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首页> 外文期刊>RSC Advances >Influence of different beta-nucleation agents on poly(L-lactic acid): structure, morphology, and dynamic mechanical behavior
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Influence of different beta-nucleation agents on poly(L-lactic acid): structure, morphology, and dynamic mechanical behavior

机译：不同β成核试剂对聚（L-乳酸）的影响：结构，形态和动态力学行为

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摘要

The effects of rare earth based beta-nucleating agent (WBG-II) and aryl amide derivative nucleating agent (TMB-5000) on the crystal structure, morphology, and dynamic mechanical behavior of poly(L-lactic acid) (PLLA) were systematically investigated. The presence of beta-form crystal in PLLA composites has been confirmed through various techniques including wide-angle X-ray diffraction (WAXD), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The crystallization behaviors of WBG-II and TMB-5000 nucleated PLLA were studied via WAXD and polarized optical microscope (POM) techniques. The experimental results convincingly reveal that WBG-II and TMB-5000 not only accelerate the crystallization rate, but also alter the packing structure of PLLA chains in the crystals. Furthermore, a significant difference in crystal dimensions and nucleation density was observed clearly. Moreover, the effect of different beta-nucleating agents on the storage modulus (E') and dynamic loss (tan delta) of pure PLLA, PLLA/TMB-5000(0.25) and PLLA/WBG-II0.25 were investigated by dynamic mechanical analysis (DMA).
机译：基于稀土的β-成核剂（WBG-II）和芳基酰胺衍生物成核剂（TMB-5000）对聚（L-乳酸）（PLLA）的晶体结构，形态和动态力学行为的影响系统调查。通过包括广角X射线衍射（WAXD），傅里叶变换红外光谱（FTIR）和拉曼光谱，通过各种技术证实了PLLA复合材料中β形成晶体中的存在。通过WAXD和偏振光显微镜（POM）技术研究了WBG-II和TMB-5000核PLLA的结晶行为。实验结果令人信服地揭示了WBG-II和TMB-5000不仅加速结晶速率，而且还改变了晶体中PLLA链的包装结构。此外，清楚地观察到晶体尺寸和核切割密度的显着差异。此外，通过动态机械研究了纯PLLA，PLLA / TMB-5000（0.25）和PLLA / WBG-II0.25的不同β成核试剂对储存模量（E'）和动态损失（TAN DELTA）的影响分析（DMA）。

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  • 来源
    《RSC Advances》 |2017年第87期|共7页
  • 作者

    Su Lele; Zou Jun; Dong Shengtao; Hao Niyuan; Xu Haiqing;

  • 作者单位

    Jiangsu Univ Sci &

    Technol Sch Mat Sci &

    Engn Zhenjiang 212003 Peoples R China;

    Jiangsu Univ Sci &

    Technol Sch Mat Sci &

    Engn Zhenjiang 212003 Peoples R China;

    Jiangsu Univ Sci &

    Technol Sch Mat Sci &

    Engn Zhenjiang 212003 Peoples R China;

    Jiangsu Univ Sci &

    Technol Sch Mat Sci &

    Engn Zhenjiang 212003 Peoples R China;

    Huaiyin Inst Technol Jiangsu Prov Engn Lab Adv Mat Salt Chem Ind Huaian 223003 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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