{"title":"热刺激电流技术在聚合物分子运动分析中的应用","authors":"H. Shimizu, T. Kitano, K. Nakayama","doi":"10.1109/ISE.1996.578158","DOIUrl":null,"url":null,"abstract":"The glass transition of a liquid crystalline copolyester of p-hydroxybenzoic acid (HBA) and 2-hydroxy-6-naphthoic acid (ANA) was studied by the thermally stimulated depolarization current (TSDC) and the thermal sampling (TS)-TSDC methods. The poling temperature (Tp) dependence of global TSDC spectra revealed the existence of the sub-Tg relaxation which was responsible for the apparent broadening of the glass transition of this copolyester. The TS-TSDC spectra also revealed that the temperature dependence of the relaxation times in both the sub-Tg and /spl alpha/ relaxations was ruled by the same compensation temperature (Tc). The physical meaning of Tc was discussed in relation to the thermal-expansion coefficient.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"140 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"An application of thermally stimulated current technique to molecular motion analysis of polymers\",\"authors\":\"H. Shimizu, T. Kitano, K. Nakayama\",\"doi\":\"10.1109/ISE.1996.578158\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The glass transition of a liquid crystalline copolyester of p-hydroxybenzoic acid (HBA) and 2-hydroxy-6-naphthoic acid (ANA) was studied by the thermally stimulated depolarization current (TSDC) and the thermal sampling (TS)-TSDC methods. The poling temperature (Tp) dependence of global TSDC spectra revealed the existence of the sub-Tg relaxation which was responsible for the apparent broadening of the glass transition of this copolyester. The TS-TSDC spectra also revealed that the temperature dependence of the relaxation times in both the sub-Tg and /spl alpha/ relaxations was ruled by the same compensation temperature (Tc). The physical meaning of Tc was discussed in relation to the thermal-expansion coefficient.\",\"PeriodicalId\":425004,\"journal\":{\"name\":\"9th International Symposium on Electrets (ISE 9) Proceedings\",\"volume\":\"140 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1996-09-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"9th International Symposium on Electrets (ISE 9) Proceedings\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ISE.1996.578158\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"9th International Symposium on Electrets (ISE 9) Proceedings","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISE.1996.578158","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An application of thermally stimulated current technique to molecular motion analysis of polymers
The glass transition of a liquid crystalline copolyester of p-hydroxybenzoic acid (HBA) and 2-hydroxy-6-naphthoic acid (ANA) was studied by the thermally stimulated depolarization current (TSDC) and the thermal sampling (TS)-TSDC methods. The poling temperature (Tp) dependence of global TSDC spectra revealed the existence of the sub-Tg relaxation which was responsible for the apparent broadening of the glass transition of this copolyester. The TS-TSDC spectra also revealed that the temperature dependence of the relaxation times in both the sub-Tg and /spl alpha/ relaxations was ruled by the same compensation temperature (Tc). The physical meaning of Tc was discussed in relation to the thermal-expansion coefficient.