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Modeling of polystyrenic nanoparticles driven beta-trans-crystalline efficiency in isotactic polypropylene

机译:多苯乙烯纳米粒子的建模驱动β-反式结晶效率在全同立构聚丙烯中

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摘要

Addition of 2 wt% mono-size, 180 nm in diameter, soft nanoparticles (SNPs) of linear and cross-linked polystyrene (PS and XPS) and styrene-acrylonitrile copolymers containing 25 wt% acrylonitrile (SAN25 and XSAN25) induced relative beta-polymorphism as much as 20, 27, 34 and 10%, respectively, during 10 minutes annealing of isotactic polypropylene (iPP) at 116 degrees C. It became nil, however, by changing the annealing conditions: time and/or temperature. The beta nucleation efficiency of the studied SNPs were modeled based on their normalized phenyl groups surface accessibility to the methyl groups of matrix chains profusion divided by the main components commensuration mismatch multiplied or divided by absolute particle rigidity at the crystallization conditions. A bi-exponential function with four constants could be fitted over the extracted data points rationalizing the kinetic and thermodynamic aspects of the phenomenon.
机译:添加2wt%单尺寸,直径为180nm,直径的含有线性和交联聚苯乙烯(Ps和XPS)和苯乙烯 - 丙烯腈共聚物的含有25wt%丙烯腈(San25和Xsan25)的相对β- 多态性分别为20,27,34和10%,在10分钟内在116℃下退火的10分钟内退火,然而,通过改变退火条件:时间和/或温度变为NIL。 基于其归一化的苯基基团的β核化效率对基质链的甲基的标准化苯基基团的表面可接近性除以通过在结晶条件下的绝对粒子刚度相乘或除以绝对颗粒刚性的主要组分。 具有四个常数的双指数函数可以拟合在提取的数据点上,合理化现象的动力学和热力学方面。

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  • 来源
    《RSC Advances》 |2016年第76期|共10页
  • 作者单位

    Amirkabir Univ Technol Nano &

    Smart Polymers Ctr Excellence Dept Polymer Engn &

    Color Technol POB 15875-4413 Tehran Iran;

    Amirkabir Univ Technol Nano &

    Smart Polymers Ctr Excellence Dept Polymer Engn &

    Color Technol POB 15875-4413 Tehran Iran;

    Amirkabir Univ Technol Nano &

    Smart Polymers Ctr Excellence Dept Polymer Engn &

    Color Technol POB 15875-4413 Tehran Iran;

    Amirkabir Univ Technol Nano &

    Smart Polymers Ctr Excellence Dept Polymer Engn &

    Color Technol POB 15875-4413 Tehran Iran;

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

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