Nonisothermal Crystallization Kinetics of Biodegradable Poly(butylene succinate)- b-Poly(diethylene glycol succinate) Multiblock Copolymers by the Avrami and the Mo’s Methods Exclusively
LI Shaolong, XU Yi, CHEN Nongtian, YANG Wenfeng
Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618307
Abstract: The polymer processing is usually operated under nonisothermal conditions, the study on nonisothermal crystallization behaviors of polymers have very importantly practical meaning for choosing suitable processing method, equipment, temperature and time to prepare polymer materials with excellent comprehensive or desired properties. We investigated the isothermal crystallization kinetics of biodegradable poly(butylene succinate)-b-poly(diethylene glycol succinate) multiblock copolymers by the Avrami and the Mo’s method. The results showed that Avrami and the Mo’s methods can be used to describe the nonisothermal crystallization behaviors of the four samples. The crystallization mechanism almost kept unchanged while the crystallization rate decreased with an increase of PDGS content. The results also demonstrated that the decrease of crystallization rates was attributed to the dilute effect of PDGS with an increase of PDGS content in PBS-b-PDGS copolyesters. The study on the nonisothermal crystallization kinetics of PBS-b-PDGS provide theory basis for the actual processing molding.
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2018, Vol. 32 
