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Enhanced mechanical properties of olefin block copolymer by adding a quaternary ammonium salt functionalized graphene oxide

机译：通过加入季铵盐官能化石墨烯氧化物增强烯烃嵌段共聚物的力学性能

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摘要

As a promising substitute for traditional thermoplastic elastomers, olefin block copolymers (OBCs) exhibit a marvelous application potential in many fields. To further improve the mechanical properties of OBCs, in this paper, quaternary ammonium salt cetyltrimethyl ammonium bromide (CTAB) was firstly introduced as a modifier for the non-covalent functionalization of graphene oxide (GO), then the modified GO (CTAB-GO) was used as a reinforcing agent for OBCs. With the incorporation of CTAB, a fine dispersion of GO in organic solvent and later in the OBC matrix have been achieved. As a result, the mechanical performance is largely improved, e.g., the increases of tensile strength, elongation at break and Young's modulus are 30%, 13% and 78%, respectively, with 1.0 wt% CTAB-GO incorporation. It is also observed that CTAB-GO exhibits a stronger nucleation ability on crystallization of OBC than pristine GO, which leads to a higher crystallization temperature and smaller size of crystals.
机译：作为传统热塑性弹性体的有前途的替代品，烯烃嵌段共聚物（OBC）在许多领域中表现出奇妙的应用潜力。 为了进一步改善obcs的机械性能，本文首先将季铵盐亚甲基三甲基铵（CTAB）作为石墨烯氧化物（GO）的非共价官能化的改性剂，然后改性的GO（CTAB-GO）。 用作obcs的增强剂。 随着CTAB的掺入，已经实现了在有机溶剂中的精细分散在OBC基质中。 结果，机械性能大大提高，例如，拉伸强度的增加，断裂伸长率和杨氏模量的增加分别为30％，13％和78％，掺入1.0wt％ctab-go掺入。 还观察到Ctab-Go对OBC的结晶表现出更强的成核能力，而不是原始的液体，这导致更高的结晶温度和较小的晶体尺寸。

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  • 来源
    《RSC Advances》 |2016年第60期|共8页
  • 作者

    Sui Guopeng; Zhao Yongsheng; Zhang Qin; Fu Qiang;

  • 作者单位

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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