Pub Date : 2024-04-21DOI: 10.31044/1994-6260-2024-0-4-2-6
S. Polunin, Irina Gorbunova, Michael Kerber
In this work, the viscoelastic properties of epoxy polymers modified with hexagonal boron nitride were studied. The calculated elastic modulus is compared with its experimental value. It has been established that boron nitride does not significantly affect the glass transition temperature of epoxy polymers
{"title":"The properties of epoxy matrix modified by boron nitride","authors":"S. Polunin, Irina Gorbunova, Michael Kerber","doi":"10.31044/1994-6260-2024-0-4-2-6","DOIUrl":"https://doi.org/10.31044/1994-6260-2024-0-4-2-6","url":null,"abstract":"In this work, the viscoelastic properties of epoxy polymers modified with hexagonal boron nitride were studied. The calculated elastic modulus is compared with its experimental value. It has been established that boron nitride does not significantly affect the glass transition temperature of epoxy polymers","PeriodicalId":166286,"journal":{"name":"All the Materials. Encyclopedic Reference Book.","volume":"106 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140678592","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 : 2024-01-01DOI: 10.31044/1994-6260-2024-0-1-26-30
A. V. Dedov, N. Chernousova, V. A. Zakharova
Using the literature data, a model has been developed to predict the kinetics of desorption of a drug from a tablet based on hydroxypropyl methylcellulose at different water mixing rates. Upon contact of the tablet with gastric juice, the polymer swelled with the formation of a gel-like shell, which prevents the transfer of gastric juice into the tablet and determines the release rate of the drug into the human body. An equation was used that describes the kinetic dependences of the desorption of a drug in the coordinate system of a conditional time equal to the square root of the observation time. The dependence of the coefficients of the equation on the mixing rate was established, which made it possible to obtain a model for predicting the kinetics of drug desorption from the time of contact with water and the water mixing rate.
{"title":"Modeling of kinetics of drug desorption from tablet based on polymer matrix","authors":"A. V. Dedov, N. Chernousova, V. A. Zakharova","doi":"10.31044/1994-6260-2024-0-1-26-30","DOIUrl":"https://doi.org/10.31044/1994-6260-2024-0-1-26-30","url":null,"abstract":"Using the literature data, a model has been developed to predict the kinetics of desorption of a drug from a tablet based on hydroxypropyl methylcellulose at different water mixing rates. Upon contact of the tablet with gastric juice, the polymer swelled with the formation of a gel-like shell, which prevents the transfer of gastric juice into the tablet and determines the release rate of the drug into the human body. An equation was used that describes the kinetic dependences of the desorption of a drug in the coordinate system of a conditional time equal to the square root of the observation time. The dependence of the coefficients of the equation on the mixing rate was established, which made it possible to obtain a model for predicting the kinetics of drug desorption from the time of contact with water and the water mixing rate.","PeriodicalId":166286,"journal":{"name":"All the Materials. Encyclopedic Reference Book.","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140522237","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 : 2022-11-01DOI: 10.31044/1994-6260-2022-0-11-24-30
A. Vertepa, I. Starostina, N. Kuzina, Y.V. Perukhin, O. Stoyanov
Composites based on high-pressure polyethylene and ethylene-vinyl acetate copolymer, containing sepiolite clay powder with a chain-layered structure have been investigated, and their physical-mechanical properties have been analyzed. When using sepiolite, the organomodification and compatibilization are not required. It is shown, that composite materials with the addition of sepiolite are superior in a number of characteristics to those containing traditionally applied layered clay powders.
{"title":"Modification of high-density polyethylene and ethylene-vinyl acetate copolymer by chain-layered silicate «sepiolite»","authors":"A. Vertepa, I. Starostina, N. Kuzina, Y.V. Perukhin, O. Stoyanov","doi":"10.31044/1994-6260-2022-0-11-24-30","DOIUrl":"https://doi.org/10.31044/1994-6260-2022-0-11-24-30","url":null,"abstract":"Composites based on high-pressure polyethylene and ethylene-vinyl acetate copolymer, containing sepiolite clay powder with a chain-layered structure have been investigated, and their physical-mechanical properties have been analyzed. When using sepiolite, the organomodification and compatibilization are not required. It is shown, that composite materials with the addition of sepiolite are superior in a number of characteristics to those containing traditionally applied layered clay powders.","PeriodicalId":166286,"journal":{"name":"All the Materials. Encyclopedic Reference Book.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114488353","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 : 2021-06-21DOI: 10.31044/1994-6260-2021-0-6-3-13
D. Reshetnyak, E. S. Zhavoronok, O. Legonkova, A. S. Ogannisyan, A. Panov, S. Kedik
Analysis of published information on polymer-based liquid embolizing agents is carried out in this review. The registered and used brands are described: Onyx™, PHIL™ and Squid, as well as less well-known Easyx™ and Menox™. Data on their composition, properties and application are given. The advantages and the disadvantages of the described embolizing agents are discussed.
{"title":"Modern liquid embolizing agents based on polymers: composition, properties and applications (review)","authors":"D. Reshetnyak, E. S. Zhavoronok, O. Legonkova, A. S. Ogannisyan, A. Panov, S. Kedik","doi":"10.31044/1994-6260-2021-0-6-3-13","DOIUrl":"https://doi.org/10.31044/1994-6260-2021-0-6-3-13","url":null,"abstract":"Analysis of published information on polymer-based liquid embolizing agents is carried out in this review. The registered and used brands are described: Onyx™, PHIL™ and Squid, as well as less well-known Easyx™ and Menox™. Data on their composition, properties and application are given. The advantages and the disadvantages of the described embolizing agents are discussed.","PeriodicalId":166286,"journal":{"name":"All the Materials. Encyclopedic Reference Book.","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127313228","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 : 1900-01-01DOI: 10.31044/1994-6260-2022-0-13-43-49
D. G. Slobodinyuk, I. Lunegov, O.A. Majorova, E. Shklyaeva, G. Abashev
{"title":"NEW SYNTHETIC APPROACH TO THE PREPARATION OF 2,4,6-TRISUBSTITUTED PYRIMIDINE AND INVESTIGATION OF ITS THERMAL, OPTICAL AND ELECTROCHEMICAL AND ELECTROPHYSICAL PROPERTIES","authors":"D. G. Slobodinyuk, I. Lunegov, O.A. Majorova, E. Shklyaeva, G. Abashev","doi":"10.31044/1994-6260-2022-0-13-43-49","DOIUrl":"https://doi.org/10.31044/1994-6260-2022-0-13-43-49","url":null,"abstract":"","PeriodicalId":166286,"journal":{"name":"All the Materials. Encyclopedic Reference Book.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124829464","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 : 1900-01-01DOI: 10.31044/1994-6260-2021-0-7-33-37
E. Cherezova, Y. Karaseva, K. Momzyakova
It has been established that the introduction of powdered cellulose, obtained by chemo-mechanical destruction from oat straw, into the composition of rubbers as a hydrosorption filler increases the conditional tensile strength of vulcanizates in comparison with samples without this filler. It was revealed that the degree of swelling of rubbers containing powdered cellulose from oat straw, the pH of the aqueous medium and the degree of mineralization have little effect.
{"title":"HYDROPHILIC RUBBER BASED ON BUTADIENE-NITRILE RUBBER AND POWDER CELLULOSE OF PLANT ORIGIN","authors":"E. Cherezova, Y. Karaseva, K. Momzyakova","doi":"10.31044/1994-6260-2021-0-7-33-37","DOIUrl":"https://doi.org/10.31044/1994-6260-2021-0-7-33-37","url":null,"abstract":"It has been established that the introduction of powdered cellulose, obtained by chemo-mechanical destruction from oat straw, into the composition of rubbers as a hydrosorption filler increases the conditional tensile strength of vulcanizates in comparison with samples without this filler. It was revealed that the degree of swelling of rubbers containing powdered cellulose from oat straw, the pH of the aqueous medium and the degree of mineralization have little effect.","PeriodicalId":166286,"journal":{"name":"All the Materials. Encyclopedic Reference Book.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126593497","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 : 1900-01-01DOI: 10.31044/1994-6260-2023-0-6-21-29
A. Chepurnenko, Tatiana Kondratieva, Timur Deberdeev, V. Akopyan, A. Avakov, V. Chepurnenko
The article deals with the problem of determining the rheological parameters of polymers from stress relaxation curves using the CatBoost machine learning algorithm. The model is trained on theoretical curves constructed using the non-linear Maxwell-Gurevich equation. A comparison is made with other methods, including the classical algorithm, non-linear optimization methods and artificial neural networks.
{"title":"Prediction of rheological parameters of polymers, using gradient boosting algorithm CatBoost","authors":"A. Chepurnenko, Tatiana Kondratieva, Timur Deberdeev, V. Akopyan, A. Avakov, V. Chepurnenko","doi":"10.31044/1994-6260-2023-0-6-21-29","DOIUrl":"https://doi.org/10.31044/1994-6260-2023-0-6-21-29","url":null,"abstract":"The article deals with the problem of determining the rheological parameters of polymers from stress relaxation curves using the CatBoost machine learning algorithm. The model is trained on theoretical curves constructed using the non-linear Maxwell-Gurevich equation. A comparison is made with other methods, including the classical algorithm, non-linear optimization methods and artificial neural networks.","PeriodicalId":166286,"journal":{"name":"All the Materials. Encyclopedic Reference Book.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121677717","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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