Non-isothermal crystallization kinetics of biodegradable poly(butylene succinate-co-diethylene glycol succinate) copolymers

Autor: Shao-Long Li, Yu-Zhong Wang, Jian-Bing Zeng, Chang-Lian Xu, Fang-Yang Liu
Rok vydání: 2013
Předmět:
Zdroj: Thermochimica Acta. 568:38-45
ISSN: 0040-6031
DOI: 10.1016/j.tca.2013.06.025
Popis: We have modified the properties of biodegradable poly(butylene succinate) (PBS) by incorporation of diethylene glycol to form poly(butylene succinate-co-diethylene glycol succinate) (P(BS-co-DEGS)) copolymers and investigated the fundamental properties and isothermal crystallization behaviors of P(BS-co-DEGS) in previous study. The non-isothermal crystallization is also important for the practical use since they are usually processed under non-isothermal conditions. Therefore, in the present paper we exclusively investigated the non-isothermal crystallization kinetics of P(BS-co-DEGS) and compared with that of neat PBS using differential scanning calorimeter. Three classical methods including Avrami, Ozawa, and Mo's equations have been used to analyze the non-isothermal crystallization kinetics of neat PBS and P(BS-co-DEGS) copolymers. The results suggest that both Avrami and Mo's methods are suitable while Ozawa method is not suitable to describe the non-isothermal crystallization of the polymers. The crystallization rate decreased gradually with increase in the content of DEGS while the crystallization mechanism almost kept unchanged. The non-isothermal crystallization activation energies were evaluated by Vyazovkin method and the results are in accordance with those obtained by other methods.
Databáze: OpenAIRE
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