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首页> 外文期刊>Journal of Polymers and the Environment >Grafting of Glycidyl Methacrylate onto Poly(lactide) and Properties of PLA/Starch Blends Compatibilized by the Grafted Copolymer
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Grafting of Glycidyl Methacrylate onto Poly(lactide) and Properties of PLA/Starch Blends Compatibilized by the Grafted Copolymer

机译：甲基丙烯酸缩水甘油酯在聚丙交酯上的接枝以及与接枝共聚物相容的PLA /淀粉共混物的性能

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摘要

Poly(lactide)-graft-glycidyl methacrylate (PLA-g-GMA) copolymer was prepared by grafting GMA onto PLA in a batch mixer using benzoyl peroxide as an initiator. The graft content was determined with the 'H-NMR spectroscopy by calculating the relative area of the characteristic peaks of PLA and GMA. The result shows that the graft content increases from 1.8 to 11.0 wt% as the GMA concentration in the feed varies from 5 to 20 wt%. The PLA/starch blends were prepared by the PLA-g-GMA copolymer as a compatibilizer, and the structure and properties of PLA/starch blends with or without the PLA-g-GMA copolymer were characterized by SEM, DSC, tensile test and medium resistance test. The result shows that the PLA/starch blends without the PLA-g-GMA copolymer show a poor interfacial adhesion and the starch granules are clearly observed, nevertheless the starch granules are better dispersed and covered by PLA when the PLA-g-GMA copolymer as a compatibilizer. The mechanical properties of the PLA/starch blends with the PLA-g-GMA copolymer are obviously improved, such as tensile strength at break increasing from 18.6 ± 3.8 MPa to 29.3 ± 5.8 MPa, tensile modulus from 510 ± 62 MPa to 901 ± 62 MPa and elongation at break from 1.8 ± 0.4 % to 3.4 ± 0.6 %, respectively, for without the PLA-g-GMA copolymer. In addition, the medium resistance of PLA/starch blends with the PLA-g-GMA copolymer was much better than PLA/ starch blends.
机译：聚（丙交酯）-接枝-甲基丙烯酸缩水甘油酯（PLA-g-GMA）共聚物是通过在间歇混合器中使用过氧化苯甲酰作为引发剂将GMA接枝到PLA上而制备的。用1 H-NMR光谱通过计算PLA和GMA特征峰的相对面积来确定接枝物含量。结果表明，随着进料中GMA浓度从5到20 wt％变化，接枝含量从1.8到11.0 wt％增加。以PLA-g-GMA共聚物为增容剂制备PLA /淀粉共混物，并通过SEM，DSC，拉伸试验和介质表征了有无PLA-g-GMA共聚物的PLA /淀粉共混物的结构和性能。电阻测试。结果表明，不含PLA-g-GMA共聚物的PLA /淀粉共混物显示出差的界面粘合性，并且清楚地观察到淀粉颗粒，但是当PLA-g-GMA共聚物用作淀粉时，淀粉颗粒可以更好地被PLA分散和覆盖。增容剂。含PLA-g-GMA共聚物的PLA /淀粉共混物的机械性能得到明显改善，例如断裂抗张强度从18.6±3.8 MPa增加到29.3±5.8 MPa，拉伸模量从510±62 MPa增加到901±62对于没有PLA-g-GMA共聚物的MPa，断裂伸长率分别从1.8±0.4％到3.4±0.6％。另外，PLA /淀粉共混物与PLA-g-GMA共聚物的中等耐性远好于PLA /淀粉共混物。

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  • 来源
    《Journal of Polymers and the Environment》 |2012年第3期|p.810-816|共7页
  • 作者

    Junshao Liu; Huihua Jiang; Liangbi Chen;

  • 作者单位

    Department of Environment and Architectural Engineering, Wuyi University, Wuyishan 354300, China,Key Laboratory of Green Chemical Industry and Technology of Fujian Province, Wuyishan 354300, China;

    Department of Environment and Architectural Engineering, Wuyi University, Wuyishan 354300, China;

    Department of Environment and Architectural Engineering, Wuyi University, Wuyishan 354300, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    starch; PLA-g-GMA; compatibilizer; grafting polymerization;

    机译：淀粉;PLA-g-GMA;相容剂接枝聚合;

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