Thermal Properties of Poly(L-lactide)Containing Succinic Dihydrazide Derivative

摘要

The slow crystallization speed is one of the most important factors restricting the development of Poly(L-lactide)(PLLA).In this paper,a succinic dihydrazide derivative BPASD was prepared to study its influence on the PLLA's non-isothermal crystallization behavior and thermal decomposition behavior.A comparative study on the melt-crystallization of the PLLA/BPASD and pure PLLA showed that the BPASD could promote the melt-crystallization of PLLA in cooling,and a larger amount of BPASD exhibited the better nucleation effect for PLLA.However,the cold-crystallization peak moved to the lower temperature with increasing of BPASD loading.Additionally,the cooling rate and the heating rate were two improtant factors to the crystallization process of PLLA.Thermal stability measurements showed that the pure PLLA and all PLLA/BPASD samples have only one thermal decomposition profile,but the presence of BPASD reduced the thermal stability of PLLA.