Pub Date : 2021-06-30DOI: 10.51580/2021-1/2710-1185.25
L. Kayukova, G. Baitursynova, E. Yergaliyeva, B. A. Zhaksylyk, N. Yelibayeva, A. Kurmangaliyeva, Almaty Kazakhstan Jsc «Al-Farabi KazNU»
Pyrazolinium structures have practically valuable biological properties. Their methods of synthesis mainly consist in the reactions of cyclization of steroid compounds containing an enone fragment with a variety of hydrazines. We have previously obtained new spiropyrazolinium compounds by hydrolysis of 3-(β-heteroamino)ethyl-5-aryl-1,2,4-oxadiazoles and by arylsulfochlorination of β-aminopropioamidoximes. The aim of the work is to reveal the dependence of the structure of the final β-aminopropioamidoximes tosylation products from the structure of the starting amidoxime and strength of base. Methodology. The tosylation of β-aminopropioamidoximes was carried out in chloroform using diisopropylethylamine as a base. The synthesis was carried out at room temperature for 15–20 h. The progress of the reaction was monitored by TLC. After completion of the reaction, the precipitate was filtered off, followed by evaporation of the filtrate and additional precipitation of the product; the combined precipitates were recrystallized from isopropanol. Results and discussion. The products of tosylation of β-aminopropioamidoximes were obtained in 45‒65% yields and identified using physicochemical and spectral [IR, NMR (1H and 13C)] characteristics, tosylation of β-aminopropioamidoximes (β-amino group: piperidin-1-yl, morpholine -1-yl, thiomorpholin-1-yl, 4-phenyl-piperazin-1-yl) proceeds with the formation of spirocyclic compounds ‒ arylsulfonates of 2-amino-1,5-diazaspiro [4.5]-dec-1-ene-5-ammonium; tosylation of β-(benzimidazol-1-yl)propioamidoxime gives the product on the oxygen atom of the amidoxime group.
{"title":"ARYLSULPHONATES OF SPIROPYRAZOLINES AND O-TOSILATE-β-(BENZIMIDAZOL-1-YL)PROPIOAMIDOXYME AS THE PRODUCTS OF β-AMINOPROPIOAMIDOXIMES TOSYLATION","authors":"L. Kayukova, G. Baitursynova, E. Yergaliyeva, B. A. Zhaksylyk, N. Yelibayeva, A. Kurmangaliyeva, Almaty Kazakhstan Jsc «Al-Farabi KazNU»","doi":"10.51580/2021-1/2710-1185.25","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.25","url":null,"abstract":"Pyrazolinium structures have practically valuable biological properties. Their methods of synthesis mainly consist in the reactions of cyclization of steroid compounds containing an enone fragment with a variety of hydrazines. We have previously obtained new spiropyrazolinium compounds by hydrolysis of 3-(β-heteroamino)ethyl-5-aryl-1,2,4-oxadiazoles and by arylsulfochlorination of β-aminopropioamidoximes. The aim of the work is to reveal the dependence of the structure of the final β-aminopropioamidoximes tosylation products from the structure of the starting amidoxime and strength of base. Methodology. The tosylation of β-aminopropioamidoximes was carried out in chloroform using diisopropylethylamine as a base. The synthesis was carried out at room temperature for 15–20 h. The progress of the reaction was monitored by TLC. After completion of the reaction, the precipitate was filtered off, followed by evaporation of the filtrate and additional precipitation of the product; the combined precipitates were recrystallized from isopropanol. Results and discussion. The products of tosylation of β-aminopropioamidoximes were obtained in 45‒65% yields and identified using physicochemical and spectral [IR, NMR (1H and 13C)] characteristics, tosylation of β-aminopropioamidoximes (β-amino group: piperidin-1-yl, morpholine -1-yl, thiomorpholin-1-yl, 4-phenyl-piperazin-1-yl) proceeds with the formation of spirocyclic compounds ‒ arylsulfonates of 2-amino-1,5-diazaspiro [4.5]-dec-1-ene-5-ammonium; tosylation of β-(benzimidazol-1-yl)propioamidoxime gives the product on the oxygen atom of the amidoxime group.","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91450146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.51580/2021-1/2710-1185.31
A. Sabitov, S. Turganbay, A. Dzhumagazieva
New organic iodine complex in the amino acid - alkali metal salt - iodine - water systemwas synthesized. The physico-chemical properties of complexdi- ((2S) -2-amino-3- (1H-indol-3-yl) propionate)-dihydro-tetraiodide were studied. Microscopic analysis shows that particles of complex have elongated needle-like linear stick-like shapes with average size 2.50-4.00 µm. The cytotoxicity test on MDCK cell culture, antimicrobial activity on S. aureus ATCC 6538-Р (museum susceptible strain); S. aureus ATCC-BAA-39 (museum multiresistant strain); E. coli ATCC 8739 (museum susceptible strain); E. coli ATCC-BAA-196 (museum multiresistant strain); P. aeruginosa ATCC 9027 (museum susceptible strain); P. aeruginosa TA2were observed. Complex has low cytotoxicity, direct antiviral effect, and antimicrobial activity against antibiotic-resistant strains of microorganisms. Di- ((2S) -2-amino-3- (1H-indol-3-yl) propionate)-dihydro-tetraiodide does not cause any mutagenic effect on mammalian cells of the L5178Y line, both in the presence and in the absence of metabolic activation.
{"title":"Structure and Properties of the di- ((2S) -2-amino-3- (1H-indol-3-yl)propionate)-dihydro-tetraiodide","authors":"A. Sabitov, S. Turganbay, A. Dzhumagazieva","doi":"10.51580/2021-1/2710-1185.31","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.31","url":null,"abstract":"New organic iodine complex in the amino acid - alkali metal salt - iodine - water systemwas synthesized. The physico-chemical properties of complexdi- ((2S) -2-amino-3- (1H-indol-3-yl) propionate)-dihydro-tetraiodide were studied. Microscopic analysis shows that particles of complex have elongated needle-like linear stick-like shapes with average size 2.50-4.00 µm. The cytotoxicity test on MDCK cell culture, antimicrobial activity on S. aureus ATCC 6538-Р (museum susceptible strain); S. aureus ATCC-BAA-39 (museum multiresistant strain); E. coli ATCC 8739 (museum susceptible strain); E. coli ATCC-BAA-196 (museum multiresistant strain); P. aeruginosa ATCC 9027 (museum susceptible strain); P. aeruginosa TA2were observed. Complex has low cytotoxicity, direct antiviral effect, and antimicrobial activity against antibiotic-resistant strains of microorganisms. Di- ((2S) -2-amino-3- (1H-indol-3-yl) propionate)-dihydro-tetraiodide does not cause any mutagenic effect on mammalian cells of the L5178Y line, both in the presence and in the absence of metabolic activation.","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85853711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.51580/2021-1/2710-1185.23
G. Mukanova, M. A. Tileuzhanova, K. Sadykov
The water management Basin is a geoecological system, the core of which is rivers, and the connecting elements are waste water. Therefore, it is very important to study and recognize not only the Basic Laws of the functioning of this geosystem, but also the processes that ensure its Sustainable Development and dynamics of evolution and allow us to develop reliable and at the same time safe water use management methods for Natural Resources. The article considers the geoecological situation of the Alakol watershed. Physical and chemical studies of the Alakol Basin, the lake system located on the territory of two administrative districts of East Kazakhstan region and Alakol District of Almaty region were carried out according to St RK 1432-2005. Territorial recreational systems located on the shores of the lake near the villages of Akshi, Koktuma, Kabanbai, Koktal are subject to the greatest anthropogenic impact in the process of recreational use, so the basis of our research is an assessment of their geoecological state. According to the results of research in the waters of the Alakol water reservoir on hydromorphological parameters, a large number of dangerous pollutants, including compounds of heavy metals, pesticides, ammonia, ammonium, ammonium, ammonium, ammonium. Based on this analysis, it is possible to determine the specifics of the formation of the level of contamination in the basin of Lake Alakol, as well as to compare the level of contamination and classify the range of concentrations of the element under study. This, in turn, will allow the public to assess the level of pollution of water resources and adopt appropriate solutions.
{"title":"THE ECOLOGICAL CONDITION OF THE GEOSYTEMS OF THE LAKE ALAKOL","authors":"G. Mukanova, M. A. Tileuzhanova, K. Sadykov","doi":"10.51580/2021-1/2710-1185.23","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.23","url":null,"abstract":"The water management Basin is a geoecological system, the core of which is rivers, and the connecting elements are waste water. Therefore, it is very important to study and recognize not only the Basic Laws of the functioning of this geosystem, but also the processes that ensure its Sustainable Development and dynamics of evolution and allow us to develop reliable and at the same time safe water use management methods for Natural Resources. The article considers the geoecological situation of the Alakol watershed. Physical and chemical studies of the Alakol Basin, the lake system located on the territory of two administrative districts of East Kazakhstan region and Alakol District of Almaty region were carried out according to St RK 1432-2005. Territorial recreational systems located on the shores of the lake near the villages of Akshi, Koktuma, Kabanbai, Koktal are subject to the greatest anthropogenic impact in the process of recreational use, so the basis of our research is an assessment of their geoecological state. According to the results of research in the waters of the Alakol water reservoir on hydromorphological parameters, a large number of dangerous pollutants, including compounds of heavy metals, pesticides, ammonia, ammonium, ammonium, ammonium, ammonium. Based on this analysis, it is possible to determine the specifics of the formation of the level of contamination in the basin of Lake Alakol, as well as to compare the level of contamination and classify the range of concentrations of the element under study. This, in turn, will allow the public to assess the level of pollution of water resources and adopt appropriate solutions.","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85053610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.51580/2021-1/2710-1185.27
Z. Myltykbayeva, Z. Yeshova, A. Seisembekova, M. Smaiyl
Oil vanadylporphyrin complexes were obtained by extraction in the presence of N-N-dimethylformamide. In the chromatographic separation of vanadylporphyrin complexes, four main fractions were obtained from the oils of the oil field “North Buzachi” , where all types of known oil porphyrin structures were identified, dominated by deoxophylloerythroethioporphyrin – types with two absorption maxima of 534 Nm and 573 nm. It was found that the total concentration of vanadylporphyrin complexes registered in the absorption zone of 534 nm and 573 nm is 11 times higher than the concentration of nickelporphyrin complexes characteristic of the absorption zone of 550 nm. The ratio of vanadylporphirins of the etio - and deoxo-phylloerythroethioporphyrin (DPEP) type was 0.11. The results of the research allow us to conclude that the oil of the “North Buzachi” oil and gas district is a promising raw material for obtaining vanadylporphyrin complexes.
在n - n -二甲基甲酰胺存在下，通过萃取得到油钒基卟啉配合物。在“北布扎奇”油田油中钒基卟啉络合物的色谱分离中，得到了4个主要组分，鉴定出了已知的所有类型的油卟啉结构，以脱氧叶红-型卟啉为主，最大吸收峰分别为534 Nm和573 Nm。结果表明，在534 nm和573 nm的吸收区，钒基卟啉配合物的总浓度比550 nm的吸收区镍基卟啉配合物的浓度高11倍。四、脱氧叶状红埃塞俄比亚卟啉(DPEP)型钒基卟啉的比值为0.11。研究结果表明，“北布扎赤”油气区的石油是制备钒基卟啉配合物的理想原料。
{"title":"DETERMINATION OF THE CONCENTRATION AND SEPARATION OF VANADYLPORPHYRIN COMPLEXES BY EXTRACTION FROM OIL OF THE OIL AND GAS DISTRICT “NORTH BUZACH”","authors":"Z. Myltykbayeva, Z. Yeshova, A. Seisembekova, M. Smaiyl","doi":"10.51580/2021-1/2710-1185.27","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.27","url":null,"abstract":"Oil vanadylporphyrin complexes were obtained by extraction in the presence of N-N-dimethylformamide. In the chromatographic separation of vanadylporphyrin complexes, four main fractions were obtained from the oils of the oil field “North Buzachi” , where all types of known oil porphyrin structures were identified, dominated by deoxophylloerythroethioporphyrin – types with two absorption maxima of 534 Nm and 573 nm. It was found that the total concentration of vanadylporphyrin complexes registered in the absorption zone of 534 nm and 573 nm is 11 times higher than the concentration of nickelporphyrin complexes characteristic of the absorption zone of 550 nm. The ratio of vanadylporphirins of the etio - and deoxo-phylloerythroethioporphyrin (DPEP) type was 0.11. The results of the research allow us to conclude that the oil of the “North Buzachi” oil and gas district is a promising raw material for obtaining vanadylporphyrin complexes.","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73026864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.51580/2021-1/2710-1185.32
A. Niyazbekova, T. Shakirov, G.N. Urinbaeva
Corrosion leads to huge losses every year, and solving this problem is an important task.One of the effective methods of corrosion protection of equipment and pipelines in the oil industry is the use of corrosion inhibitors.Inhibitory protection is the most technological and effective way to control corrosion of oilfield equipment.The article deals with phosphate corrosion inhibitors of complex action in a carbon dioxide environment.The method of corrosion testing is generally accepted. Quantitative indi-cators of corrosion processes were calculated using formulas, and the measurement uncertainty was estimated using an algorithm using the Student's coefficient with a confidence probability of 0.95. In the course of the work, potentiometric determination of the pH of corrosive media using a combined glass electrode and an ionomerand photocolorimetric determination of the content of iron (III) with potassium rhodanide, as well as methods of infrared spectroscopy and electron microscopy were carried out.
{"title":"INVESTIGATION OF VARIOUS PHOSPHATE CORROSION INHIBITORS IN CARBON DIOXIDE","authors":"A. Niyazbekova, T. Shakirov, G.N. Urinbaeva","doi":"10.51580/2021-1/2710-1185.32","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.32","url":null,"abstract":"Corrosion leads to huge losses every year, and solving this problem is an important task.One of the effective methods of corrosion protection of equipment and pipelines in the oil industry is the use of corrosion inhibitors.Inhibitory protection is the most technological and effective way to control corrosion of oilfield equipment.The article deals with phosphate corrosion inhibitors of complex action in a carbon dioxide environment.The method of corrosion testing is generally accepted. Quantitative indi-cators of corrosion processes were calculated using formulas, and the measurement uncertainty was estimated using an algorithm using the Student's coefficient with a confidence probability of 0.95. In the course of the work, potentiometric determination of the pH of corrosive media using a combined glass electrode and an ionomerand photocolorimetric determination of the content of iron (III) with potassium rhodanide, as well as methods of infrared spectroscopy and electron microscopy were carried out.","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89728009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.51580/2021-1/2710-1185.28
A. Tarbanov, A. Khabiev, Y. Ayapbergenov
Development of the oil industry in Kazakhstan at the current stage is characterized by a decrease in the quality of the raw material base. In the total balance of fields under development, the fields that have entered the late stage of development prevail and, consequently, there is a significant deterioration in their structure, an increase in the share of hard-to-recover oil reserves, watering of beds and well production.One of the main challenges during the development of the field is the deposition of inorganic salts in the oilfield equipment. This article describes the main reasons for the formation of solid inorganic deposits in oil fields, methods of scale inhibitors, as well as the classification of scale inhibitors. Presents the physical and chemical characteristics of the objects under study: the properties of oils and watersof Uzen and Zhetybai oil fields and the chemical reagents – inhibitors of scale formations. Based on the results of laboratory studies, scale inhibitors were selected, which showed high efficiency (90 - 100 %) to prevent the precipitation of CaCO3, CaSO4 and BaSO4 under the conditions of Uzen and Zhetybai oil fields. The study was conducted in the center of scientific and laboratory research branch of KMG Engineering LLP "KazNIPImunaygas".
{"title":"PREVENTING INORGANIC SCALE FORMATION IN THE UZEN AND ZHETYBAI FIELDS BY USING SCALE INHIBITORS","authors":"A. Tarbanov, A. Khabiev, Y. Ayapbergenov","doi":"10.51580/2021-1/2710-1185.28","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.28","url":null,"abstract":"Development of the oil industry in Kazakhstan at the current stage is characterized by a decrease in the quality of the raw material base. In the total balance of fields under development, the fields that have entered the late stage of development prevail and, consequently, there is a significant deterioration in their structure, an increase in the share of hard-to-recover oil reserves, watering of beds and well production.One of the main challenges during the development of the field is the deposition of inorganic salts in the oilfield equipment. This article describes the main reasons for the formation of solid inorganic deposits in oil fields, methods of scale inhibitors, as well as the classification of scale inhibitors. Presents the physical and chemical characteristics of the objects under study: the properties of oils and watersof Uzen and Zhetybai oil fields and the chemical reagents – inhibitors of scale formations. Based on the results of laboratory studies, scale inhibitors were selected, which showed high efficiency (90 - 100 %) to prevent the precipitation of CaCO3, CaSO4 and BaSO4 under the conditions of Uzen and Zhetybai oil fields. The study was conducted in the center of scientific and laboratory research branch of KMG Engineering LLP \"KazNIPImunaygas\".","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76033156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.51580/2021-1/2710-1185.34
A. V. Druzhinina, M. Suleimenova, O. A. Almabekov, A. K. Kusainova
The article describes methods for producing polymeric materials based on tetra-carboxylic acid dianhydrides obtained by photochemical or solar irradiation from furan and maleic anhydride. The procedure of synthesis of aryl-alicyclic polyimides based on 7-оxsоdiciklo (2,2,1)-gepten -2,3- dicarboxylic acid(MAF) and diaminodiphenyl oxide diamines (DADFO) and dioxytriphenyldiamine (DOTFDA) in polar aprotic amide-type solvents has been studied in detail in the presence of a basic catalyst type: trimethyl-amine.The nature and reactivity of staring monomers affect the process of obtaining polyimides. The optimal conditions for obtaining polyimides with intrinsic viscosity values of 1.30-1.64 dl/g have been found. Physicochemical, electrical and thermal proper-ties of the synthesized polyimides have been investigated. It was found that they have increased elasticity, high tensile strength. Elongation at break of polyimide films reaches 30-43%, tensile strength is 130-180 MPa. According to their electrical properties, these polyimides are classified as medium-frequency dielectrics. In addition, they differ in thermoplasticity in the range from 210 ºС to 250 ºС, have thermal stability and do not decompose at heating in air to temperatures of 335-390 ºС, and the presence of oxide groups in the structure of polymers increases the solubility of polyimides.
本文介绍了以呋喃和马来酸酐为原料，光化学或太阳辐照法制备四羧酸二酐聚合物材料的方法。详细研究了在极性非质子酰胺型溶剂中，以7- k - k (2,2,1)-gepten -2,3-二羧酸(MAF)和二氨基二苯基氧化二胺(DADFO)和二氧三苯基二胺(DOTFDA)为原料合成芳基脂环聚酰亚胺的工艺过程。起始单体的性质和反应性影响聚酰亚胺的制备过程。得到了特性粘度为1.30 ~ 1.64 dl/g的聚酰亚胺的最佳工艺条件。研究了合成的聚酰亚胺的理化、电学和热学性能。结果表明，它们具有较高的弹性和抗拉强度。聚酰亚胺薄膜的断裂伸长率可达30-43%，抗拉强度为130- 180mpa。根据它们的电性能，这些聚酰亚胺被归类为中频电介质。此外，它们在210ºС至250ºС范围内的热塑性不同，具有热稳定性，在空气中加热至335-390ºС时不会分解，并且聚合物结构中氧化基团的存在增加了聚酰亚胺的溶解度。
{"title":"SYNTHESIS OF POLYIMIDES OF ARILACYCLIC STRUCTURE","authors":"A. V. Druzhinina, M. Suleimenova, O. A. Almabekov, A. K. Kusainova","doi":"10.51580/2021-1/2710-1185.34","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.34","url":null,"abstract":"The article describes methods for producing polymeric materials based on tetra-carboxylic acid dianhydrides obtained by photochemical or solar irradiation from furan and maleic anhydride. The procedure of synthesis of aryl-alicyclic polyimides based on 7-оxsоdiciklo (2,2,1)-gepten -2,3- dicarboxylic acid(MAF) and diaminodiphenyl oxide diamines (DADFO) and dioxytriphenyldiamine (DOTFDA) in polar aprotic amide-type solvents has been studied in detail in the presence of a basic catalyst type: trimethyl-amine.The nature and reactivity of staring monomers affect the process of obtaining polyimides. The optimal conditions for obtaining polyimides with intrinsic viscosity values of 1.30-1.64 dl/g have been found. Physicochemical, electrical and thermal proper-ties of the synthesized polyimides have been investigated. It was found that they have increased elasticity, high tensile strength. Elongation at break of polyimide films reaches 30-43%, tensile strength is 130-180 MPa. According to their electrical properties, these polyimides are classified as medium-frequency dielectrics. In addition, they differ in thermoplasticity in the range from 210 ºС to 250 ºС, have thermal stability and do not decompose at heating in air to temperatures of 335-390 ºС, and the presence of oxide groups in the structure of polymers increases the solubility of polyimides.","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81119354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.51580/2021-1/2710-1185.24
A. Imangazy
This article presents the results of research on mesophase pitch production from coal tar. The preparation of mesophase pitch was carried out by heat treatment in an argon atmosphere at temperatures of 300, 350, and 400 °C. The resulting carbon pitches were analyzed by scanning electron microscopy, Raman spectroscopy, and energy-dispersive analysis. An increase in the degree of surface degradation and the number of mesophase centers per unit area was observed with an increase in the treatment temperature to 300 °C. At 350 °C, a transition from an isotropic to an anisotropic structure was observed, where the mesophase centers were about 2 μm in size. A similar anisotropic structure was observed for a sample of coal tar obtained at 400 °C, and in some areas, a layered structure was observed, which could be associated with an increase in the graphitization degree of the samples. The particle size of the mesophase increases to 3.5-5 microns. The results of energy dispersive analysis showed that an increase in temperature leads to a decrease in the sulfur content. At 400 °C, sulfur is completely removed from the coal tar pitch composition. A correlation between the heat treatment temperature and the structure of the obtained pitch was established.
{"title":"OBTAINING MESOPHASE PITCHES FROM COAL TAR","authors":"A. Imangazy","doi":"10.51580/2021-1/2710-1185.24","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.24","url":null,"abstract":"This article presents the results of research on mesophase pitch production from coal tar. The preparation of mesophase pitch was carried out by heat treatment in an argon atmosphere at temperatures of 300, 350, and 400 °C. The resulting carbon pitches were analyzed by scanning electron microscopy, Raman spectroscopy, and energy-dispersive analysis. An increase in the degree of surface degradation and the number of mesophase centers per unit area was observed with an increase in the treatment temperature to 300 °C. At 350 °C, a transition from an isotropic to an anisotropic structure was observed, where the mesophase centers were about 2 μm in size. A similar anisotropic structure was observed for a sample of coal tar obtained at 400 °C, and in some areas, a layered structure was observed, which could be associated with an increase in the graphitization degree of the samples. The particle size of the mesophase increases to 3.5-5 microns. The results of energy dispersive analysis showed that an increase in temperature leads to a decrease in the sulfur content. At 400 °C, sulfur is completely removed from the coal tar pitch composition. A correlation between the heat treatment temperature and the structure of the obtained pitch was established.","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88597917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-14DOI: 10.51580/2021-1/2710-1185.14
T. Jumadilov, B. Totkhuskyzy, L. Yskak, J. Gražulevičius
The extraction of yttrium ions by interpolymer systems based on industrial ionites: KU 2-8 cationite and AB-17 anionite was studied. The dependences of the yttrium content in the aqueous medium after sorption by the interpolymer system were studied KU 2-8:AB17-8 depending on the time, the degree of binding of the polymer chain (with respect to yttrium ions) by the initial ionites and interpolymer systems KU 2-8: AB-17-8. The maximum content of yttrium ions in the aqueous medium after sorption is observed at ratios of 3:3 and 4: 2 and the duration of remote interaction is 88 hours. At the same time, the content of yttrium in the aqueous medium after sorption is 60 mol.% and 56.4 mol.%, respectively. High values of the degree of binding of the polymer chain with respect to yttrium are observed at the ratios KU 2-8: AB-17-8=3:3
{"title":"EXTRACTION OF YTTRIUM IONS BY INTERPOLYMER SYSTEMS BASED ON INDUSTRIAL IONITES","authors":"T. Jumadilov, B. Totkhuskyzy, L. Yskak, J. Gražulevičius","doi":"10.51580/2021-1/2710-1185.14","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.14","url":null,"abstract":"The extraction of yttrium ions by interpolymer systems based on industrial ionites: KU 2-8 cationite and AB-17 anionite was studied. The dependences of the yttrium content in the aqueous medium after sorption by the interpolymer system were studied KU 2-8:AB17-8 depending on the time, the degree of binding of the polymer chain (with respect to yttrium ions) by the initial ionites and interpolymer systems KU 2-8: AB-17-8. The maximum content of yttrium ions in the aqueous medium after sorption is observed at ratios of 3:3 and 4: 2 and the duration of remote interaction is 88 hours. At the same time, the content of yttrium in the aqueous medium after sorption is 60 mol.% and 56.4 mol.%, respectively. High values of the degree of binding of the polymer chain with respect to yttrium are observed at the ratios KU 2-8: AB-17-8=3:3","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74750826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-14DOI: 10.51580/2021-1/2710-1185.11
T. Jumadilov, R. Kondaurov, A. Imangazy, Khuangul Khimersen
Molecularly imprinted polymers (MIPs) based on methacrylic acid (MAA) and 4-vinylpyridine (4VP) of two types have been synthesized (the difference in types is based on the use of ethylene glycol dimethacrylate (EGDMA) and diethylene glycol dimethacrylate (DEGDMA) as a crosslinking agent). Salts of cerium, praseodymium, neodymium, samarium, and europium were used as templates for the synthesis. Control samples of Molecularly imprinted polymers were also synthesized (samples synthesized in exactly the same way, but without the templates).Electrochemical and conformational behavior of the synthesized structures in an aqueous medium was studied. Molecularly imprinted polymers are weakly exposed to swelling and ionization due to tight crosslinking, while it should be noted that a high degree of crosslinking leads to high mechanical strength of macromolecular structures.Comparison of the measured parameters (electrical conductivity, pH) of molecularly imprinted polymers containing a template with control samples of MIP indicate the presence of cavities complementary to the template (rare-earth metal ion) used in their synthesis. In the presence of MIP synthesized in the presence of EGDMA (MIP-1) higher values of electrical conductivity and pH are observed as compared to MIP synthesized in the presence of DEGDMA (MIP-2) due to less tight crosslinking.
{"title":"INFLUENCEOFCROSSLINKINGAGENTON ELECTROCHEMICAL AND CONFORMATIONAL BEHAVIOR OF MOLECULARLY IMPRINTED POLYMERS BASED ON METHACRYLIC ACID AND 4-VINYLPYRIDINE IN AN AQUEOUS MEDIUM","authors":"T. Jumadilov, R. Kondaurov, A. Imangazy, Khuangul Khimersen","doi":"10.51580/2021-1/2710-1185.11","DOIUrl":"https://doi.org/10.51580/2021-1/2710-1185.11","url":null,"abstract":"Molecularly imprinted polymers (MIPs) based on methacrylic acid (MAA) and 4-vinylpyridine (4VP) of two types have been synthesized (the difference in types is based on the use of ethylene glycol dimethacrylate (EGDMA) and diethylene glycol dimethacrylate (DEGDMA) as a crosslinking agent). Salts of cerium, praseodymium, neodymium, samarium, and europium were used as templates for the synthesis. Control samples of Molecularly imprinted polymers were also synthesized (samples synthesized in exactly the same way, but without the templates).Electrochemical and conformational behavior of the synthesized structures in an aqueous medium was studied. Molecularly imprinted polymers are weakly exposed to swelling and ionization due to tight crosslinking, while it should be noted that a high degree of crosslinking leads to high mechanical strength of macromolecular structures.Comparison of the measured parameters (electrical conductivity, pH) of molecularly imprinted polymers containing a template with control samples of MIP indicate the presence of cavities complementary to the template (rare-earth metal ion) used in their synthesis. In the presence of MIP synthesized in the presence of EGDMA (MIP-1) higher values of electrical conductivity and pH are observed as compared to MIP synthesized in the presence of DEGDMA (MIP-2) due to less tight crosslinking.","PeriodicalId":9856,"journal":{"name":"Chemical Journal of Kazakhstan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85834338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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