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首页> 外文期刊>Journal of Polymers and the Environment >Rheology, Mechanical Properties and Morphology of Poly(lactic acid)/Ethylene Vinyl Acetate Blends
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Rheology, Mechanical Properties and Morphology of Poly(lactic acid)/Ethylene Vinyl Acetate Blends

机译：聚（乳酸）/乙烯乙烯酯共混物的流变学，力学性能和形态

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摘要

In this work, the effect of ethylene vinyl acetate (EVA) content on the rheology, mechanical properties, and morphology of poly (lactic acid) (PLA)/EVA blends was investigated. Differential Scanning Calorimetry (DSC) showed that the addition of EVA to PLA decreased the degree of crystallinity of PLA. Dynamic Mechanical Thermal Analysis (DMTA) results showed that the presence of EVA copolymer increased the cold crystallization temperature (T-cc) of PLA. The addition of 10% of EVA to PLA substantially increased the impact strength. Morphology analysis by Scanning Electron Microscopy (SEM) indicated the immiscibility between PLA and EVA phases and an in increase the EVA average dispersed phase domains size with the increase in EVA content. Rheological measurements under oscillatory shear flow showed that storage modulus (G) increased with the increase in the EVA content at low frequencies and is related to the increase in the EVA dispersed phase domains size, as also observed by relaxation spectrum analysis. Cole-Cole plots of imaginary viscosity () versus real viscosity () and Han plots of storage modulus (G) versus loss modulus (G) indicated that PLA and EVA phases are immiscible, as also observed by SEM.
机译：在这项工作中，研究了研究了乙烯乙烯酯（EVA）含量对聚（乳酸）/ EVA共混物的流变，力学性能和形态的影响。差分扫描量热法（DSC）表明，向PLA添加EVA降低了PLA的结晶度。动态机械热分析（DMTA）结果表明，EVA共聚物的存在增加了PLA的冷结晶温度（T-CC）。添加10％的EVA至PLA基本上增加了冲击强度。通过扫描电子显微镜（SEM）的形态分析表明PLA和EVA阶段之间不混溶，并且随着EVA含量的增加而增加EVA平均分散相结构尺寸。振荡剪切流程下的流变测量表明，储存量模（G）随着EVA含量的增加而增加，并且与EVA分散相结构域的增加有关，也通过松弛谱分析而观察到。 Mimayinary粘度（）的COLE-COLE图（）与真实粘度（）和储存模量（g）的汉族曲线图表明，PLA和EVA相也不混溶，也可以通过SEM观察。

著录项

  • 来源
    《Journal of Polymers and the Environment》 |2019年第7期|1439-1448|共10页
  • 作者

    Agrawal Pankaj; Araujo Aylanna P. M.; Lima Jessica C. C.; Cavalcanti Shirley N.; Freitas Daniel M. G.; Farias Giselly M. G.; Ueki Marcelo M.; Melo Tomas J. A.;

  • 作者单位

    Univ Fed Campina Grande Dept Engn Mat R Aprigio Veloso 882 BR-58429900 Campina Grande PB Brazil;

    Univ Fed Campina Grande Dept Engn Mat R Aprigio Veloso 882 BR-58429900 Campina Grande PB Brazil;

    Univ Fed Campina Grande Dept Engn Mat R Aprigio Veloso 882 BR-58429900 Campina Grande PB Brazil;

    Univ Fed Campina Grande Dept Engn Mat R Aprigio Veloso 882 BR-58429900 Campina Grande PB Brazil;

    Univ Fed Campina Grande Dept Engn Mat R Aprigio Veloso 882 BR-58429900 Campina Grande PB Brazil;

    Univ Fed Campina Grande Dept Engn Mat R Aprigio Veloso 882 BR-58429900 Campina Grande PB Brazil;

    Univ Fed Sergipe Dept Engn Mat Cidade Univ Prof Jose Aloisio Campos BR-49100000 Sao Cristovao SE Brazil;

    Univ Fed Campina Grande Dept Engn Mat R Aprigio Veloso 882 BR-58429900 Campina Grande PB Brazil;

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

    Poly(lactic acid); EVA; Polymer blends; Rheology; Morphology;

    机译：聚（乳酸）;EVA;聚合物共混物;流变学;形态学;

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