writer：Lixia hu, Linbo Wu*, Fangchao Song, Bo-Geng Li*
keywords：biodegradable,polyesters,esterification,kinetics,modeling
source：期刊
specific source：Macromol Reaction Eng
Issue time：2010年

PBST is an important biodegradable aliphatic-aromatic copolyester. Its synthesis and properties have been intensively studied, but no report deals with its polymerization kinetics and modeling up to now. As the first part of a series of studies on PBST, the kinetics of the TBT-catalyzed homogeneous SA/BDO and heterogeneous TPA/BDO esterifications were investigated experimentally and theoretically in this article. A unified kinetic model considering two main esterifications as well as one reversible polycondensation and two THF-forming side reactions has been developed for the two esterification systems. The model fits well with the experimental results. The effects of reaction temperature, diol/diacid ratio, catalyst amount and heterogeneity on the esterification kinetics are simulated and discussed.