Anderson Gonçalves, Aloisi Somer, João Gomes Junior, Jaqueline V. Gunha, G. K. Cruz, Andressa Novatski
{"title":"Efeito da adição de BaO nas propriedades térmicas e estruturais do sistema vítreo TeO2-Li2O-BaO","authors":"Anderson Gonçalves, Aloisi Somer, João Gomes Junior, Jaqueline V. Gunha, G. K. Cruz, Andressa Novatski","doi":"10.18362/BJTA.V6.I4.24","DOIUrl":"https://doi.org/10.18362/BJTA.V6.I4.24","url":null,"abstract":"","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86731735","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}
Rafael de Godoi Machado, P. O. Ferreira, C. Gaglieri, F. Caires
: The neodymium complex with the ligand norfloxacin was synthesized in the solid state. Characterization and thermal behavior of the compounds were performed employing X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR) and Simultaneous Thermogravimetry/Derivate Thermogravimetric-Differential Thermal Analysis (TG/DTG-DTA). From the TG/DTG-DTA curves, it was possible to determine the minimum formula ([Nd(Nor)3]6H2O), thermal stability and thermal decomposition steps. XRD showed that the complex was obtained with low crystallinity and analysis of the main bands of the IR spectrum it was possible to suggest the probable sites of coordination of the ligand to the neodymium ion.
{"title":"Synthesis, Characterization and Thermoanalytical Studies of Neodymium Norfloxacinate","authors":"Rafael de Godoi Machado, P. O. Ferreira, C. Gaglieri, F. Caires","doi":"10.18362/bjta.v6.i3.19","DOIUrl":"https://doi.org/10.18362/bjta.v6.i3.19","url":null,"abstract":": The neodymium complex with the ligand norfloxacin was synthesized in the solid state. Characterization and thermal behavior of the compounds were performed employing X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR) and Simultaneous Thermogravimetry/Derivate Thermogravimetric-Differential Thermal Analysis (TG/DTG-DTA). From the TG/DTG-DTA curves, it was possible to determine the minimum formula ([Nd(Nor)3]6H2O), thermal stability and thermal decomposition steps. XRD showed that the complex was obtained with low crystallinity and analysis of the main bands of the IR spectrum it was possible to suggest the probable sites of coordination of the ligand to the neodymium ion.","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84938323","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}
{"title":"Estudo Termoanalítico e Espectroscópico de Norfloxacino-Excipientes","authors":"C. D. S. Brito, B. Costa, M. I. G. Leles","doi":"10.18362/bjta.v6.i3.17","DOIUrl":"https://doi.org/10.18362/bjta.v6.i3.17","url":null,"abstract":"","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84978529","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}
N. C. F. Stofella, L. J. Oliveira, Andressa Veiga, Mariana Mengarda, A. E. Hamasaki, M. B. Ferreira, Itamar Francisco Andreazza, M. Sato, M. A. S. Filho, Fábio S. Murakami
{"title":"Avaliação da Estabilidade Térmica da Hidroquinona em Emulsões Faramcêuticas","authors":"N. C. F. Stofella, L. J. Oliveira, Andressa Veiga, Mariana Mengarda, A. E. Hamasaki, M. B. Ferreira, Itamar Francisco Andreazza, M. Sato, M. A. S. Filho, Fábio S. Murakami","doi":"10.18362/bjta.v6.i3.18","DOIUrl":"https://doi.org/10.18362/bjta.v6.i3.18","url":null,"abstract":"","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76126413","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}
{"title":"ANALYSIS OF THERMO-OXIDATIVE STABILITY OF LUBRICANT OIL CONTAMINATED WITH BIODIESEL","authors":"T. F. Oliveira, M. Campello, J. Dweck","doi":"10.18362/BJTA.V6.I3.16","DOIUrl":"https://doi.org/10.18362/BJTA.V6.I3.16","url":null,"abstract":"","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80125939","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}
{"title":"The Thermal Decomposition of Hydrated ZrOCl2 Revisited","authors":"G. J. Puts","doi":"10.18362/BJTA.V6.I3.20","DOIUrl":"https://doi.org/10.18362/BJTA.V6.I3.20","url":null,"abstract":"","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78662999","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}
S. A. Araújo, A.G.D. Santos, A. S. Araújo, N. S. Fernandes
The aim of the current work was evaluate the process of catalytic degradation of High Density PolyEthylene (HDPE) using AlMCM-41 nanostructured catalyst. This study was carried out by thermogravimetry and pyrolysis coupled to gas chromatography. The AlMCM-41 material was synthesized from an hydrogel containing cethyltrimethylammonium bromide (CTMABr) as template, pseudobohemite, fumed silica, sodium silicate and distilled water as solvent. These reactants were mixed in order to obtain a gel with the following composition: 1CTMABr:4SiO2:0.04 Al2O3:1Na2O:200H2O. The kinetic relative to the process of HDPE degradation was evaluated using Flynn-Wall model, in order to verify the influence of the AlMCM-41 material on the process. Clear differences were observed in the thermogravimetry behavior of the samples. Results obtained shown a remarkable effect of the catalyst in the acceleration of the degradation processes. The kinetic parameters obtained revealed a reduction in the activation energy of the catalytic decomposition as compared to the thermal process.
{"title":"CATALYTIC DEGRADATION OF HIGH DENSITY POLYETHYLENE OVER NANOSTRUCTURED MATERIAL EVALUATED BY TG","authors":"S. A. Araújo, A.G.D. Santos, A. S. Araújo, N. S. Fernandes","doi":"10.18362/BJTA.V6.I2.13","DOIUrl":"https://doi.org/10.18362/BJTA.V6.I2.13","url":null,"abstract":"The aim of the current work was evaluate the process of catalytic degradation of High Density PolyEthylene (HDPE) using AlMCM-41 nanostructured catalyst. This study was carried out by thermogravimetry and pyrolysis coupled to gas chromatography. The AlMCM-41 material was synthesized from an hydrogel containing cethyltrimethylammonium bromide (CTMABr) as template, pseudobohemite, fumed silica, sodium silicate and distilled water as solvent. These reactants were mixed in order to obtain a gel with the following composition: 1CTMABr:4SiO2:0.04 Al2O3:1Na2O:200H2O. The kinetic relative to the process of HDPE degradation was evaluated using Flynn-Wall model, in order to verify the influence of the AlMCM-41 material on the process. Clear differences were observed in the thermogravimetry behavior of the samples. Results obtained shown a remarkable effect of the catalyst in the acceleration of the degradation processes. The kinetic parameters obtained revealed a reduction in the activation energy of the catalytic decomposition as compared to the thermal process.","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"17 1","pages":"13-18"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79436483","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}
Felipe Patrese R. Silva, Beatriz França Viana, J. Santos, Wilham Donizette Nunes, J. A. Teixeira, E. Ionashiro
{"title":"SÍNTESE, CARACTERIZAÇÃO E ESTUDO TERMOANALÍTICO DOS ISOFTALATOS DE Mg (II), Ca (II), Sr (II), Ba (II)","authors":"Felipe Patrese R. Silva, Beatriz França Viana, J. Santos, Wilham Donizette Nunes, J. A. Teixeira, E. Ionashiro","doi":"10.18362/BJTA.V6.I2.14","DOIUrl":"https://doi.org/10.18362/BJTA.V6.I2.14","url":null,"abstract":"","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"7 1","pages":"19-27"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88897387","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}
Pamela Geraldo Hiacuna, Ronaldo Spezia Nunes, J. Luiz
{"title":"COMPORTAMENTO TÉRMICO DE 4-AMINOBENZENOSSULFONATOS DE ALGUNS METAIS DE TRANSIÇÃO BIVALEN","authors":"Pamela Geraldo Hiacuna, Ronaldo Spezia Nunes, J. Luiz","doi":"10.18362/BJTA.V6.I2.15","DOIUrl":"https://doi.org/10.18362/BJTA.V6.I2.15","url":null,"abstract":"","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88836094","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}
Rafael Turra Alarcon, B. Holanda, Caroline Gaglieri, M. D. Almeida, Gilbert Bannach
{"title":"Recristalização do inositol pelo método por saturação de vapor com diferentes solventes: Estudo térmico, cristalográfico e morfológico","authors":"Rafael Turra Alarcon, B. Holanda, Caroline Gaglieri, M. D. Almeida, Gilbert Bannach","doi":"10.18362/BJTA.V6.I2.11","DOIUrl":"https://doi.org/10.18362/BJTA.V6.I2.11","url":null,"abstract":"","PeriodicalId":9282,"journal":{"name":"Brazilian Journal of Thermal Analysis","volume":"12 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82089521","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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