Crystallization, Melting Process and Optical Property of PLLA/PABBH System

2019 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

无线电电子学;计算机科学;材料科学

Zhao, Lisha^1 ; Cai, Yanhua^1

College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Yongchuan

402160, China^1

关键词: Cold crystallization;    Crystallization time;    Melt crystallization;    Melting behavior;    Nonisothermal crystallization;    Nucleating agents;    Poly L lactic acid;    Promoting effect;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/563/2/022020/pdf
DOI  :  10.1088/1757-899X/563/2/022020

来源: IOP

【 摘 要 】

The goal of this research was developing a new organic nucleating agent and investigating its influence on the non-isothermal crystallization including melt-crystallization and cold-crystallization, melting behavior and optical property of Poly(L-lactic acid) (PLLA). The results from the melt-crystallization indicated that the N, N′-bis(benzoyl) phenylmalonic acid dihydrazide (PABBH) could be used as an effective role in nucleation, and 2 wt% PABBH had the best crystallization promoting effect for PLLA. However, the increase of PABBH content made the cold-crystallization peak shift toward the higher temperature. The melting behavior of PLLA/PABBH sample depended on the crystallization time, and the double-melting peaks were ascribed to the melting-recrystallization. The introduction of PABBH seriously decreased the transmittance of PLLA resulting from an increase of crystallinity and the yellowish-brown of PABBH itself.