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Crystallization and Structural Analysis of Poly(trimethylene terephthalate) Film Studied by Raman Spectroscopy

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關(guān)鍵詞：

poly(trimethylene terephthalate) crystallization raman spectrum

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所屬學(xué)科：

分子表征

來(lái)源：

第六屆亞歐研討會(huì)上處理和性能增強(qiáng)聚合物會(huì)議文集（2013.6.2-6 武漢）

簡(jiǎn)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

上傳時(shí)間：

2013-07-03 14:40:14

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