{"title":"Dipolar relaxations in the glass transition region and in the liquid crystalline phase of two side‐chain liquid crystalline polysiloxanes","authors":"J. Ramos, J. Mano, D. Lacey, G. Nestor","doi":"10.1002/(SICI)1099-0488(19960915)34:12<2067::AID-POLB12>3.0.CO;2-#","DOIUrl":null,"url":null,"abstract":"The molecular relaxation mechanisms in the glass transition region and in the liquid crystalline phase exhibited by two side-chain liquid crystalline polysiloxanes [Si(Me) 2 O] x [Si(Me)(R)O] y (R= (CH 2 ) 8 OPhCOOPh(Me)(CN) have been studied by Thermally Stimulated Discharge Currents. These results were compared with those previously obtained by dielectric relaxation spectroscopy. It was observed that two relaxation mechanisms were present in the liquid crystalline phase, and we suggest that these might correspond to the motions of the mesogenic moieties in the liquid crystalline phase.","PeriodicalId":16853,"journal":{"name":"Journal of Polymer Science. Part B, Polymer Physics","volume":"121 1","pages":"2067-2075"},"PeriodicalIF":0.0000,"publicationDate":"1996-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"13","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Polymer Science. Part B, Polymer Physics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1002/(SICI)1099-0488(19960915)34:12<2067::AID-POLB12>3.0.CO;2-#","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Materials Science","Score":null,"Total":0}
引用次数: 13
Abstract
The molecular relaxation mechanisms in the glass transition region and in the liquid crystalline phase exhibited by two side-chain liquid crystalline polysiloxanes [Si(Me) 2 O] x [Si(Me)(R)O] y (R= (CH 2 ) 8 OPhCOOPh(Me)(CN) have been studied by Thermally Stimulated Discharge Currents. These results were compared with those previously obtained by dielectric relaxation spectroscopy. It was observed that two relaxation mechanisms were present in the liquid crystalline phase, and we suggest that these might correspond to the motions of the mesogenic moieties in the liquid crystalline phase.
用热激发放电电流研究了两种侧链液晶聚硅氧烷[Si(Me) 2o] x [Si(Me)(R)O] y (R= (CH 2) 8 OPhCOOPh(Me)(CN)在玻璃过渡区和液晶相中的分子弛豫机制。这些结果与先前用介电弛豫光谱得到的结果进行了比较。观察到液晶相中存在两种弛豫机制，我们认为这可能与液晶相中介生部分的运动相对应。
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