Bingtao Wang , Yanqun Pan , Liping Zhao , Juan Li , Zhenghong Guo
{"title":"富勒烯及其衍生物改性高密度聚乙烯的热降解和热氧化降解动力学与机理","authors":"Bingtao Wang , Yanqun Pan , Liping Zhao , Juan Li , Zhenghong Guo","doi":"10.1016/j.tca.2024.179871","DOIUrl":null,"url":null,"abstract":"<div><div>To investigate the effect of fullerene (C<sub>60</sub>) and its iron compound (C<sub>60</sub>-Fe) on the thermal and thermo-oxidative degradation mechanism of high-density polyethylene (HDPE), the Kissinger method, Flynn-Wall-Ozawa method and Coats-Redfern methods are used. The data of thermal and thermo-oxidative degradation are achieved through the thermogravimetric (TG) analysis, and the trapping free-radical ability and the dispersion of C<sub>60</sub> or C<sub>60</sub>-Fe in matrix are characterized by the electron spin resonance (ESR) and transmission electron microscopy (TEM). C<sub>60</sub> and C<sub>60</sub>-Fe improve effectively the thermal and thermo-oxidative stability of HDPE. In N<sub>2</sub>, C<sub>60</sub> and C<sub>60</sub>-Fe do not change the degradation mechanism of HDPE, and the degradation rate is determined by the random generation and growth of free-radicals. In air, C<sub>60</sub> changes the reaction order (<em>n</em>) of HDPE at the oxidation stage and the degradation mechanism at the random fracture. C<sub>60</sub>-Fe changes the thermo-oxidative mechanism of HDPE due to the formation of cross-linked network.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Kinetics and mechanism of thermal and thermo-oxidative degradation for high-density polyethylene modified by fullerene and its derivative\",\"authors\":\"Bingtao Wang , Yanqun Pan , Liping Zhao , Juan Li , Zhenghong Guo\",\"doi\":\"10.1016/j.tca.2024.179871\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>To investigate the effect of fullerene (C<sub>60</sub>) and its iron compound (C<sub>60</sub>-Fe) on the thermal and thermo-oxidative degradation mechanism of high-density polyethylene (HDPE), the Kissinger method, Flynn-Wall-Ozawa method and Coats-Redfern methods are used. The data of thermal and thermo-oxidative degradation are achieved through the thermogravimetric (TG) analysis, and the trapping free-radical ability and the dispersion of C<sub>60</sub> or C<sub>60</sub>-Fe in matrix are characterized by the electron spin resonance (ESR) and transmission electron microscopy (TEM). C<sub>60</sub> and C<sub>60</sub>-Fe improve effectively the thermal and thermo-oxidative stability of HDPE. In N<sub>2</sub>, C<sub>60</sub> and C<sub>60</sub>-Fe do not change the degradation mechanism of HDPE, and the degradation rate is determined by the random generation and growth of free-radicals. In air, C<sub>60</sub> changes the reaction order (<em>n</em>) of HDPE at the oxidation stage and the degradation mechanism at the random fracture. C<sub>60</sub>-Fe changes the thermo-oxidative mechanism of HDPE due to the formation of cross-linked network.</div></div>\",\"PeriodicalId\":23058,\"journal\":{\"name\":\"Thermochimica Acta\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-09-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Thermochimica Acta\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0040603124002107\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, ANALYTICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thermochimica Acta","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0040603124002107","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
Kinetics and mechanism of thermal and thermo-oxidative degradation for high-density polyethylene modified by fullerene and its derivative
To investigate the effect of fullerene (C60) and its iron compound (C60-Fe) on the thermal and thermo-oxidative degradation mechanism of high-density polyethylene (HDPE), the Kissinger method, Flynn-Wall-Ozawa method and Coats-Redfern methods are used. The data of thermal and thermo-oxidative degradation are achieved through the thermogravimetric (TG) analysis, and the trapping free-radical ability and the dispersion of C60 or C60-Fe in matrix are characterized by the electron spin resonance (ESR) and transmission electron microscopy (TEM). C60 and C60-Fe improve effectively the thermal and thermo-oxidative stability of HDPE. In N2, C60 and C60-Fe do not change the degradation mechanism of HDPE, and the degradation rate is determined by the random generation and growth of free-radicals. In air, C60 changes the reaction order (n) of HDPE at the oxidation stage and the degradation mechanism at the random fracture. C60-Fe changes the thermo-oxidative mechanism of HDPE due to the formation of cross-linked network.
期刊介绍:
Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application.
The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta.
The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas:
- New and improved instrumentation and methods
- Thermal properties and behavior of materials
- Kinetics of thermally stimulated processes