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首页> 外文期刊>Journal of Polymers and the Environment >Microcellular Foaming Behaviors of Poly (Lactic Acid)/Low-Density Polyethylene Blends Induced by Compatibilization Effect
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Microcellular Foaming Behaviors of Poly (Lactic Acid)/Low-Density Polyethylene Blends Induced by Compatibilization Effect

机译：增容作用引起的聚乳酸/低密度聚乙烯共混物的微孔起泡行为

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摘要

A facile methodology for improving the crystallization ability, rheological properties and microcellular foaming behaviors of poly (lactic acid)/low-density polyethylene (PLA/LDPE) blends through compatibilization was proposed. Poly (ethylene octene) grafted with glycidyl methacrylate (GPOE) as reactive compatibilizer was introduced into PLA/LDPE blends and the resultant PLA/LDPE/GPOE blends were foamed by supercritical CO2. Torque curves and Fourier transformation infrared spectroscopy results confirmed that GPOE reacted with PLA successfully. The crystallization ability and rheological properties of PLA was promoted obviously by the addition of LDPE and GPOE. The size of LDPE dispersion phase in PLA/LDPE blends decreased from 4.4 +/- 0.1 to 1.2 +/- 0.1 mu m, owing to the compatibility effect. When the content of GPOE reach 8 phr, microcellular structure appeared in the PLA/LDPE/GPOE blending foam. An interesting flower-like cellular structure was observed in PLA/LDPE/GPOE blending foams, with the foaming temperature at 85 and 90 degrees C. Finally, the microcellular foaming mechanism for various PLA foams was proposed and clarified using schematic diagram.
机译：提出了一种通过相容性改善聚乳酸/低密度聚乙烯（PLA / LDPE）共混物结晶能力，流变性能和微孔发泡行为的简便方法。将接枝有甲基丙烯酸缩水甘油酯（GPOE）作为反应性增容剂的聚（乙烯辛烯）引入PLA / LDPE共混物中，并通过超临界CO2将所得的PLA / LDPE / GPOE共混物发泡。扭矩曲线和傅立叶变换红外光谱结果证实GPOE与PLA成功反应。 LDPE和GPOE的加入明显提高了PLA的结晶能力和流变性能。由于相容作用，PLA / LDPE共混物中的LDPE分散相的尺寸从4.4 +/- 0.1微米减小到1.2 +/- 0.1微米。当GPOE含量达到8 phr时，PLA / LDPE / GPOE混合泡沫中出现了微孔结构。在发泡温度分别为85和90摄氏度的PLA / LDPE / GPOE混合泡沫中观察到了有趣的花状泡孔结构。最后，通过示意图提出并阐明了各种PLA泡沫的微孔发泡机理。

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  • 来源
    《Journal of Polymers and the Environment》 |2019年第8期|1721-1734|共14页
  • 作者

    Wang Xianzeng; Li Yang; Jiao Yang; Zhou Hongfu; Wang Xiangdong;

  • 作者单位

    Beijing Technol & Business Univ, Sch Mat & Mech Engn, Beijing 100048, Peoples R China|Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China;

    Beijing Technol & Business Univ, Sch Mat & Mech Engn, Beijing 100048, Peoples R China|Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China;

    Beijing Ray Appl Res Ctr, Beijing 100012, Peoples R China;

    Beijing Technol & Business Univ, Sch Mat & Mech Engn, Beijing 100048, Peoples R China|Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China;

    Beijing Technol & Business Univ, Sch Mat & Mech Engn, Beijing 100048, Peoples R China|Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Poly (lactic acid); Low-density polyethylene; Microcellular; Foam; Compatibilization;

    机译：聚乳酸;低密度聚乙烯;微孔;泡沫;相容性;

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