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Crystallization and Structural Analysis of Poly(trimethylene terephthalate) Film Studied by Raman Spectroscopy  
Crystallization and Structural Analysis of Poly(trimethylene terephthalate) Film Studied by Raman Spectroscopy
资料类型: PDF文件
关键词: poly(trimethylene  terephthalate)  crystallization  raman  spectrum  
资料大小: 101K
所属学科: 分子表征
来源: 第六届亚欧研讨会上处理和性能增强聚合物会议文集(2013.6.2-6 武汉)
简介:
Poly(trimethyleneterephthalate)(PTT)exhibitsexcellenthighbirefringence,luminoustransmittance,resilienceandprocessingpropertieswhichcanbeappliedinopticalcommunications,fiberandthermoplasticengineering.ThemacroscopicpropertiesofsemicrystallinePTT,suchasdegreeofcrystallizationanddevelopmentofthespheruliteshavecloserelationswithitsmicrostructureandspecificmorphologies.Althoughitiswellestablishedreliabletheoriesenablingthepredictionofcrystallizationkinetics,butchanginginstructureandpropertiesduringcoldcrystallizationhasremainedasubjectofspeculationandcontroversy.Inthisstudy,thedynamicprocessofcoldcrystallizationofamorphousPTTwasinvestigatedbyRamanspectrum.Theinformationofeachphaseduringcrystallization,includinginduction,nucleation,nucleusgrowthandsecondarycrystallizationwasrevealedbyRamanspectrum.TheexperimentalresultsindicatedthatthekineticsparametersmeasuredbytheRamanmethodwereingoodagreementwiththoseobtainedbydifferentialscanningcalorimetry(DSC).Inaddition,theRamanmethodwascapableofprovidingmoredetailedinformationaboutmoleculemovementandvariationinfinestructures,suchasmoleculearrangementandorientationfluctuationsofrigidsegmentsinthecourseofglasstransitionandcrystallizationinduction.
作者: C. L. Hu,J. Y. Liu, L. Wang
上传时间: 2013-07-03 14:40:14
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