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首页> 外文期刊>Journal of Applied Polymer Science >The chain microstructure and condensed structure of polyethylene resin used for Biaxially stretched film
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The chain microstructure and condensed structure of polyethylene resin used for Biaxially stretched film

机译：用于双轴拉伸薄膜的聚乙烯树脂的链微观结构和冷凝结构

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摘要

To explore the desirable chain structure and condensed structure of polyethylene used for biaxial stretching, the blends of two polyethylenes (PE1 and PE2) with different molecular weight and branch distribution were investigated. Their condensed structure including relaxation and crystallization behavior was studied by rheology, dynamic mechanical analysis (DMA), and non-isothermal crystallization kinetics. And the chain microstructure was characterized by preparative temperature rising elution fractionation (P-TREF), and successive self-nucleation and annealing (SSA). It was demonstrated that the structural variables were not changing monotonically with the increment of the PE1 content. The longest relaxation time, lowest and less varied crystallization rate always appeared when the blend contained 15 wt% of PE1. This excellent structure was owing to the formation of more branches on the short chains, resulting in the uniform distribution of lamellae size and thus showing the widest biaxial stretchable temperature range (i.e., 8 degrees C).
机译：为了探索用于双向拉伸的聚乙烯的理想链结构和凝聚结构，研究了两种不同分子量和分支分布的聚乙烯（PE1和PE2）的共混物。通过流变学、动态力学分析（DMA）和非等温结晶动力学研究了它们的凝聚结构，包括弛豫和结晶行为。通过制备升温洗脱分馏（P-TREF）和连续自成核退火（SSA）表征了链的微观结构。结果表明，结构变量不随PE1含量的增加而单调变化。当PE1质量分数为15%时，共混物的松弛时间最长，结晶速率最低且变化较小。这种优异的结构是由于短链上形成了更多的分支，导致片晶尺寸的均匀分布，从而显示出最宽的双轴拉伸温度范围（即8摄氏度）。

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  • 来源
    《Journal of Applied Polymer Science》 |2021年第2期|共12页
  • 作者

    Li Yu; Jiang Binbo; Li Wei; Wang Jingdai; Yang Yongrong;

  • 作者单位

    Zhejiang Univ Dept Chem &

    Biol Engn State Key Lab Chem Engn Hangzhou 310027 Peoples R China;

    Zhejiang Univ Dept Chem &

    Biol Engn State Key Lab Chem Engn Hangzhou 310027 Peoples R China;

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo Key Lab Specialty Polymers Ningbo 315211 Peoples R China;

    Zhejiang Univ Dept Chem &

    Biol Engn State Key Lab Chem Engn Hangzhou 310027 Peoples R China;

    Zhejiang Univ Dept Chem &

    Biol Engn State Key Lab Chem Engn Hangzhou 310027 Peoples R China;

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  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
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