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Structure-property relationship of nitramino oxetane polymers: a computational study on the effect of pendant chains

机译:硝基氨基氧乙烷聚合物的结构 - 性质关系:吊坠链效应的计算研究

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摘要

A comprehensive study of the effect of the structure of pendant chains on the energetic and mechanical properties of nitramino oxetane polymers has been conducted. Enthalpy of formation (EOF), density, glass transition temperature, and elastic moduli were calculated via quantum mechanics and molecular dynamic simulations. It is shown in this study that -CH2 groups are unfavorable for EOFs, densities, and elastic moduli of the polymers, whereas -NCH3NO2 groups are favorable for these parameters. The glass transition temperature (T-g) shows non-monotonic features with increasing -CH2 groups; it reaches a minimum value when the pendant chains consist of 1 or 2 -CH2 groups. Moreover, the location of the pendant chains can strongly affect T-g of the polymers. Our study suggests that the asymmetric structure, distantly located pendant chains and appropriate length of the pendant chains can effectively reduce T-g of the polymers with negligible compromise to other properties.
机译:已经进行了对悬垂链结构对硝基氧乙烷聚合物的能量和力学性能的综合研究。 通过量子力学和分子动态模拟计算形成(EOF),密度,玻璃化转变温度和弹性模量的焓。 在该研究中显示,-CH2基团对于聚合物的EOF,密度和弹性模量不利,而-NCH3NO2基团是有利的这些参数。 玻璃化转变温度(T-G)显示非单调的特征,随着-CH2组; 当吊坠链包括1或2 -CH2组时,它达到最小值。 此外,侧链的位置可以强烈影响聚合物的T-G。 我们的研究表明,不对称结构,远处定位悬挂链和垂直链的适当长度可以有效地降低与其他性质可忽略不计的聚合物的T-G。

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  • 来源
    《RSC Advances》 |2019年第6期|共8页
  • 作者单位

    Xian Modern Chem Res Inst Xian 710065 Shaanxi Peoples R China;

    Xian Modern Chem Res Inst Xian 710065 Shaanxi Peoples R China;

    Xian Modern Chem Res Inst Xian 710065 Shaanxi Peoples R China;

    Xian Modern Chem Res Inst Xian 710065 Shaanxi Peoples R China;

    Xian Modern Chem Res Inst Xian 710065 Shaanxi Peoples R China;

    Northwest Univ Sch Phys Xian Shaanxi Peoples R China;

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