Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior
Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior
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叶片挤出机制备的聚乳酸/聚丙烯和增容聚乳酸/聚丙烯共混物：机械性能、形态和热行为分析
DOI：
10.1515/polyeng-2014-0312
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发表时间：
2015-10
影响因子：
2
通讯作者：
Qu Jin-ping
中科院分区：
文献类型：
--
作者：
Chen Rong-yuan;Zou Wei;Zhang Hai-chen;Zhang Gui-zhen;Yang Zhi-tao;Qu Jin-ping
摘要采用新型叶片挤出机，制备了不同质量分数的聚乳酸/聚丙烯共混物。研究了共混物的力学性能、形态结构、结晶行为和热稳定性。当PP含量不超过50wt%时，拉伸强度、弯曲强度和断裂伸长率呈非线性下降，然后随PP含量的增加而增加。弯曲弹性模量随PP质量分数的增加而降低。聚乳酸/PP 90：10共混物具有最佳的冲击强度。扫描电子显微镜测试表明，共混物是不相容的。当共混比为50：50时，发生明显的相分离。对于聚乳酸/PP 90：10共混物，分散相PP粒子的平均直径在1.11μm处最小。差示扫描量热仪测量表明，低含量的PP促进了聚乳酸的结晶。以PP为基质时，共混物中的聚乳酸组分阻碍了PP的结晶。热重分析测量涉及共混物的两步分解过程。通过与PP共混，提高了共混物的耐热性。马来酸酐接枝PP和乙烯/丙烯酸丁酯/甲基丙烯酸缩水甘油酯三元共聚物作为相容剂有助于提高共混物的力学性能、结晶性能和耐热性。
Abstract Poly(lactic acid) (PLA)/polypropylene (PP) blends with different weight fractions were prepared by a novel vane extruder. The mechanical properties, morphology, crystallization behavior and thermal stability of the blends were investigated. The tensile strength, flexural strength and elongation at break decreased nonlinearly when the PP content was not more than 50 wt% and then increased with an increase in the PP content. The flexural modulus decreased with increasing PP weight fraction. The PLA/PP 90:10 blend exhibited the optimum impact strength. Scanning electron microscopy measurements revealed that the PLA/PP blends were immiscible. Phase separation occurred significantly at a blend ratio of 50:50. Regarding the PLA/PP 90:10 blend, the mean diameter of the disperse-phase PP particles was the smallest at 1.11 μm. Differential scanning calorimetry measurements showed that low content of PP enhanced the crystallization of PLA. The PLA component in the blends impeded the crystallization of PP when PP was used as the matrix. The thermogravimetric analysis measurement involved a two-step decomposition process of the blends. The thermal resistance of the blends was improved by compounding with PP. As compatibilizers, both the maleic anhydride-grafted PP and the ethylene/n-butyl acrylate/glycidyl methacrylate terpolymer helped improve the mechanical properties, crystallization property and thermal resistance of the PLA/PP blends.
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影响因子：
3.2
作者：
Shikui Jia;J. Qu;Weifeng Liu;Chengran Wu;Rongyuan Chen;Shufeng Zhai;Z. Huang
通讯作者：
Shikui Jia;J. Qu;Weifeng Liu;Chengran Wu;Rongyuan Chen;Shufeng Zhai;Z. Huang
影响因子：
56.9
作者：
Gross, RA;Kalra, B
通讯作者：
Kalra, B
马来酸酐接枝聚乙烯-辛烯弹性体增容的聚酰胺-6/聚乳酸共混物
影响因子：
--
作者：
Li, Zhong-Ming;Wang, Yu-Ling;Hu, Xiao;Ji, Xu;Li, Hai
通讯作者：
Li, Hai
影响因子：
5.4
作者：
M. Todo;Sang Dae Park;T. Takayama;K. Arakawa
通讯作者：
M. Todo;Sang Dae Park;T. Takayama;K. Arakawa
影响因子：
4.6
作者：
Shibata, M;Inoue, Y;Miyoshi, M
通讯作者：
Miyoshi, M