writer：Yang Jinjun, Liang Rong, Kong Rui, Chen Yichun, Wang Xiaomin, Yin Jing, Wan Jiping, Wang Xiaoli, Bi
keywords：Crystal morphology, Polymorphism, Thermal stability
source：期刊
specific source：Polymer Degradation and Stability
Issue time：2017年

In this work, a oxalamide derivative, N1,N10-(ethane-1,2-diyl)bis(N2-phenyloxalamide) (EDPO) was synthesized

successfully to prepare the poly(1,4-butylene adipate) PBA/EDPO composite. The EDPO first

crystallized into the rod-like (shish) and induced the PBA crystal aligned perpendicularly to the EDPO rod

axis. As an effective nucleating agent, the EDPO highly increased the crystallization rate and shortened

the crystallization time of the PBA. The EDPO not only facilitated the formation of the PBA a-crystal and

modulated the polymorphic crystalline structure of the PBA, but also accelerated the b-to-a phase

transition of the PBA. Upon the extremely low (such as 0.1%) weight fraction of the EDPO, the thermal

stability of the PBA increased pronouncedly. The mechanisms on the nucleation and growth of the PBA,

the preferential formation of the a-crystal, accelerated phase transition and enhanced thermal stability of

the PBA were also proposed and discussed.