Open AccessStudies of Poly(L-lactic acid) Composites: Influence of 1H-Benzotriazole on Thermal and Mechanical Performance in Matrix
Author(s) -
Lisha Zhao,
Yuanli Shen,
YanHua Cai
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/592/1/012026
Subject(s) - differential scanning calorimetry , thermogravimetric analysis , materials science , crystallization , ultimate tensile strength , thermal decomposition , composite material , elongation , lactic acid , decomposition , fourier transform infrared spectroscopy , benzotriazole , chemical engineering , chemistry , organic chemistry , metallurgy , physics , genetics , biology , bacteria , engineering , thermodynamics
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%.