Crystallization behavior and mechanical properties of Poly(L-lactic acid)/Talc /EBS composites
Talc is very effective on the enhancement of crystallization of poly(L-lactic acid)(PLLA), and PLLA can retain fine mechanical properties with addition of ethylene bis-stearamide(EBS), Thus, PLLA /Talc/EBS composites were prepared to improve the crystallization rate and retain fine mechanical properties of material. Compared to the neat PLLA at 110 ℃ (optimal crystallization temperature), upon the addition of 10% Talc and 3% EBS, the induction period of PLLA decreased from 4 min to 0.4 min and halftime of overall crystallization decreased from 10 min to 1.8 min at 101 ℃, and degree of crystallinity of PLLA improved from 28% to 37.7%. The morphology was investigated by scanning electron microscopy, which showed that addition of Talc reduced the domain size of phase-separated particles EBS and enhanced compatibility between PLLA and EBS, which might be caused by the intercalation of both PLLA, EBS and Talc. The tensile and impact properties of PLLA/Talc/EBS composites were future investigated. The result shown that addition of high content of Talc significantly weakened the mechanical properties of biodegradable PLLA. However, Adding EBS to PLLA/Talc composites can retain fine mechanical properties of biodegradable PLLA. Compared to the neat PLLA, PLLA/EBS or PLLA/Talc composites, PLLA/Talc/EBS composites not only has crystallization rate, but also retain fine mechanical properties of material.
Cai Yan-Hua Yin Jing-Bo Fan Yan-Qing Yan Shi-Feng
Department of Polymer, School of Material Science and Engineering, Shanghai University,Shanghai, 201800, China
国际会议
桂林
英文
1-4
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）