Studies of Poly(L-lactic acid) Composites: Influence of 1H-Benzotriazole on Thermal and Mechanical Performance in Matrix

International Conference on Manufacturing Technology, Materials and Chemical Engineering

材料科学;化学工业

Zhao, Lisha^1 ; Shen, Yuanli^1 ; Cai, Yanhua^1

Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing

402160, China^1

关键词: Accelerating effect;    Crystallization process;    Differential scanning calorimeters;    Elongation at break;    Functional additives;    Mechanical performance;    Onset decomposition temperatures;    Poly L lactic acid;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/592/1/012026/pdf
DOI  :  10.1088/1757-899X/592/1/012026

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This study reported the effect of the functional additive 1H-benzotriazole (BTA) on the thermal behaviour and mechanical properties of Poly(L-lactic acid) (PLLA) through differential scanning calorimeter (DSC), infrared spectra (IR), thermogravimetric analysis (TGA) and tensile testing. The DSC measurement showed that both BTA and cooling rate greatly affected the crystallization process of PLLA, the introduction of BTA leaded to a positive effect on promoting PLLA's crystallization, but an increase of a cooling rate was negative. Compared with other concentration of BTA, 0.5 wt% BTA had the best crystallization accelerating effect. Second, thermal decomposition indicated that the onset decomposition temperatures of all PLLA/BTA composites were higher than that of BTA at same heating rate; as well as the onset decomposition temperature of BTA increased with increasing of the heating rate. Third, the mechanical performance showed that PLLA/BTA samples presented the irregular trend in the elongation at break with increasing of BTA content, and the PLLA/3%BTA had the maximum value 2.87%.