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首页> 外文期刊>Journal of Applied Polymer Science >Effect of core-shell rubber toughening on mechanical, thermal, and morphological properties of poly(lactic acid)/multiwalled carbon nanotubes nanocomposites
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Effect of core-shell rubber toughening on mechanical, thermal, and morphological properties of poly(lactic acid)/multiwalled carbon nanotubes nanocomposites

机译：核 - 壳橡胶增韧对聚（乳酸）/多壁碳纳米管纳米复合材料的机械，热和形态学性能的影响

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摘要

The effect of core-shell rubber (CSR) toughening on mechanical and thermal properties of poly(lactic acid)/multiwalled carbon nanotubes (PLA/CNT) nanocomposites were investigated. The nanocomposites were prepared by direct melt blending method in a counter-rotating twin-screw extruder. The contents of CSR were varied between 5 and 20 wt % while the content of CNT was kept at 5 phr. The extruded samples were injection molded into the desired test specimens for mechanical and thermal properties analysis. The impact strength of PLA/CNT increased with increasing CSR content with concomitant decrease in tensile strength and modulus. Interestingly, the flexural strength increased at low CSR content before decreasing at 15 and 20% content. Differential scanning calorimetry analysis on the second heating cycle shows no crystallinity content for PLA/CNT and all CSR toughened PLA/CNT nanocomposites, while thermogravimetric analysis shows lower thermal degradation of all CSR toughened PLA/CNT as compared to PLA/CNT nanocomposite. This study reveals significant correlation between CSR loading with the mechanical and thermal properties of the nanocomposites. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47756.
机译：研究了核心 - 壳橡胶（CSR）增韧对聚（乳酸）/多晶碳纳米管（PLA / CNT）纳米复合材料的机械和热性质的影响。通过在反向旋转双螺杆挤出机中直接熔融混合方法制备纳米复合材料。 CSR的含量在5到20wt％之间变化，而CNT的含量保持在5phr。将挤出的样品注射成用于机械和热性能分析的所需试样。 PLA / CNT的冲击强度随着CSR含量的增加而增加，CSR含量随着拉伸强度和模量而降低。有趣的是，在低CSR含量下弯曲强度在15％和20％的含量下降之前增加。第二加热循环的差分扫描量热法分析显示PLA / CNT和所有CSR增韧PLA / CNT纳米复合材料的结晶性含量，而热重分析显示与PLA / CNT纳米复合材料相比所有CSR增韧PLA / CNT的热降解。该研究揭示了CSR加载与纳米复合材料的机械和热性能之间的显着相关性。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,4756。

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