writer：Feng Jiang, Zhongkai Wang, Yali Qiao, Zhigang Wang,and Chuanbing Tang
keywords：第三代热塑性弹性体，纤维素，力学性能
source：期刊
specific source：Macromolecules 2013, 46, 4772-4780
Issue time：2013年

摘要：一直以来，科研工作者们都在寻求如何使用简单高效合成方法来制备性能优异的热塑性弹性体。第一代成功的热塑性弹性体是基于微相分离的ABA三嵌段共聚物 (Architecture I)。近年来，将刚性支链分散在橡胶主链基体中形成了第二代热塑性弹性体 (Architecture II)。在本文中，我们阐述了基于将刚性主链分散在接枝的橡胶基体中的第三代热塑弹性体(Architecture III)这个想法。这类第三代热塑性弹性体将无规共聚物作为侧链, 可以制备一系列具有不同力学性能的热塑性弹性体，这是第一代和第二代热塑性弹性体所欠缺的。我们使用电子转移活化再生催化剂原子转移自由基聚合方法 (ARGET ATRP) 制备了一系列具有不同纤维素含量(0.9-3.4 wt%)基于纤维素刚性主链的接枝无规共聚物的热塑性弹性体 (cellulose-g-P(BA-co-MMA) graft copolymers)，并对其进行了细致的结构和性能关系研究。

ABSTRACT: Thermoplastic elastomers (TPEs) are ever sought using a simple robust synthetic approach. Widely successful first-generation TPEs rely on microphase-separated ABA triblock copolymers (Architecture I). Recent multigraft copolymers represent the second-generation TPEs in which multiple branched rigid segments are dispersed in a rubbery backbone matrix　(Architecture II). This paper reports our discovery of the third-generation TPEs that are based on rigid backbone dispersed in a soft grafted matrix. This Architecture III allows the use of random copolymers as side chains to access a wide spectrum of TPEs that cannot be achieved by architecture designs of the first two generations. In this report, random copolymer-grafted cellulose, cellulose-graft-poly(n-butyl acrylate-co-methyl methacrylate) copolymers with only 0.9−3.4 wt % cellulose prepared by activators regenerated by electron transfer for atom transfer radical polymerization (ARGET ATRP), as novel thermoplastic elastomers are investigated.