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首页> 外文期刊>Journal of Applied Polymer Science >Interfacial compatibility of super-tough poly(lactic acid)/polyurethane blends investigated by positron annihilation lifetime spectroscopy
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Interfacial compatibility of super-tough poly(lactic acid)/polyurethane blends investigated by positron annihilation lifetime spectroscopy

机译：通过正电子湮没寿命光谱研究超强坚硬的聚（乳酸）/聚氨酯共混物的界面兼容性

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摘要

Supertough polylactide (PLA)/polyurethane (PU) blends were prepared by reactive blending of PLA with polyester polyol and toluene-2,4-diisocyanate. The free volume and interfacial compatibility between the two polymers were investigated by positron annihilation lifetime spectroscopy. The PU particles dispersed homogeneously in the PLA matrix and self-assembled into a subinclusion microstructure, resulting in fibrils and significant plastic deformation occurs during impact process. More phase interface and free volume cavities formed between PLA and PU boundary because of a good interfacial compatibility between the two polymers, leading to smaller sizes of free volume cavities, and the increasing of the number of these cavities. Therefore, the toughness of PLA was greatly improved by blending PU. (C) 2018 Wiley Periodicals, Inc.
机译：通过用聚酯多元醇和甲苯-2,4-二异氰酸酯，通过用聚酯多元醇和甲苯-2,4-二异氰酸酯反应性混合来制备Supertogl聚丙酯（PLA）/聚氨酯（PU）共混物。 通过正电子湮没寿命光谱研究了两种聚合物之间的自由体积和界面相容性。 PU颗粒在PLA基质中均匀地分散并自组装成水性化微结构，导致抗冲击过程中发生原纤维和显着的塑性变形。 由于两种聚合物之间的良好界面相容性，在PLA和PU边界之间形成更多相界面和自由体积空腔，导致较小的自由体积腔，以及这些空腔的数量的增加。 因此，通过混合PU，PLA的韧性大大提高。 （c）2018 Wiley期刊，Inc。

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  • 来源
    《Journal of Applied Polymer Science》 |2018年第32期|共6页
  • 作者

    Zhao Xipo; Yu Xiaolei; Chen Hao; Zhou Weiyi; Fang Pengfei; Peng Shaoxian;

  • 作者单位

    Hubei Univ Technol Collaborat Innovat Ctr Green Light Weight Mat &

    P Hubei Prov Key Lab Green Mat Light Ind Wuhan 430068 Hubei Peoples R China;

    Hubei Univ Technol Collaborat Innovat Ctr Green Light Weight Mat &

    P Hubei Prov Key Lab Green Mat Light Ind Wuhan 430068 Hubei Peoples R China;

    Hubei Univ Technol Collaborat Innovat Ctr Green Light Weight Mat &

    P Hubei Prov Key Lab Green Mat Light Ind Wuhan 430068 Hubei Peoples R China;

    Hubei Univ Technol Collaborat Innovat Ctr Green Light Weight Mat &

    P Hubei Prov Key Lab Green Mat Light Ind Wuhan 430068 Hubei Peoples R China;

    Wuhan Univ Sch Phys &

    Technol Wuhan 430072 Hubei Peoples R China;

    Hubei Univ Technol Collaborat Innovat Ctr Green Light Weight Mat &

    P Hubei Prov Key Lab Green Mat Light Ind Wuhan 430068 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    biodegradable; mechanical properties; structure-property relationships; surfaces and interfaces;

    机译：可生物降解;机械性能;结构性质关系;表面和界面;

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