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首页> 外文期刊>Applied Surface Science >Cellulose graft copolymers toward strong thermoplastic elastomers via RAFT polymerization
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Cellulose graft copolymers toward strong thermoplastic elastomers via RAFT polymerization

机译：纤维素接枝共聚物通过筏聚合朝向强热塑性弹性体

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摘要

A novel cellulose-based macromolecular chain transfer agent (Cell-CTA) was designed to prepare cellulose graft copolymers via reversible addition-fragmentation chain transfer (RAFT) polymerization. A series of cellulose-graft-poly(n-butylacrylate-co-acrylamide) (Cell-g-P(BA-co-AM)) copolymers were synthesized as thermoplastic elastomers (TPEs). In this molecular structure, cellulose chains were used as semirigid backbones, whereas the P (BA-co-AM) side chains acted as the rubbery matrix. The glass transition temperatures (T(g)s) of Cell-g-P(BA-coAM) copolymers can be manipulated by tuning the molar ratios between BA and AM during the polymerization process. These cellulose graft copolymers show typical elastomeric behavior and can possess strong tensile strength and high toughness according to the mechanical tests. The random distributed amide groups in AM units can form strong self-complementary hydrogen bonding as supramolecular cross-linking points in the graft copolymers. Morphological results demonstrate the homogeneous state of these Cell-g-P(BA-co-AM) copolymers. This convenient and robust grafting strategy can be further utilized to generate various cellulose-based graft copolymers as sustainable materials via rational molecular design.
机译：设计了一种新的基于纤维素的大分子链转移剂（CELL-CTA），通过可逆添加 - 碎片链转移（筏）聚合来制备纤维素接枝共聚物。一系列纤维素 - 移植物（正丁基丙烯酸酯 - 共丙烯酰胺）（Cell-G-P（Ba-P（Ba-P））共聚物被合成为热塑性弹性体（TPE）。在这种分子结构中，使用纤维素链作为半骨骨，而P（Ba-Co-am）侧链用作橡胶状基质。可以通过在聚合过程中调节Ba和Am之间的摩尔比来操纵细胞-G-P（Ba-CoAM）共聚物的玻璃化转变温度（T（g））。这些纤维素接枝共聚物显示出典型的弹性体行为，并且可以根据机械测试具有强烈的拉伸强度和高韧性。 AM单元中随机分布的酰胺基团可以在接枝共聚物中形成强的自拷贝氢键，作为共分子交联点。形态学结果证明了这些细胞-G-P（Ba-Co-am）共聚物的均匀状态。这种方便且稳健的接枝策略可以进一步利用通过合理的分子设计产生各种基于纤维素的接枝共聚物作为可持续材料。

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  • 来源
    《Applied Surface Science》 |2019年第30期|162-171|共10页
  • 作者

    Jiang Feng; Pan Chenqian; Zhang Yaqiong; Fang Yanxiong;

  • 作者单位

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Guangdong Peoples R China|Univ Maryland Dept Mat Sci & Engn College Pk MD 20742 USA;

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Guangdong Peoples R China;

    Anhui Agr Univ Sch Forestry & Landscape Architecture Biomass Mol Engn Ctr Hefei 230036 Anhui Peoples R China;

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Guangdong Peoples R China;

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

    Cellulose graft copolymers; RAFT polymerization; Elastomers; Mechanical properties;

    机译：纤维素接枝共聚物;筏聚合;弹性体;机械性能;

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