125. A Novel Architecture toward Third-Generation Thermoplastic Elastomers by a Grafting Strategy
writer：Feng Jiang, Zhongkai Wang, Yali Qiao, Zhigang Wang,and Chuanbing Tang
keywords：第三代熱塑性彈性體，纖維素，力學(xué)性能
source：期刊
specific source：Macromolecules 2013, 46, 4772-4780
Issue time：2013年
摘要：一直以來，科研工作者們都在尋求如何使用簡單高效合成方法來制備性能優(yōu)異的熱塑性彈性體。第一代成功的熱塑性彈性體是基于微相分離的ABA三嵌段共聚物 (Architecture I)。近年來，將剛性支鏈分散在橡膠主鏈基體中形成了第二代熱塑性彈性體 (Architecture II)。在本文中，我們闡述了基于將剛性主鏈分散在接枝的橡膠基體中的第三代熱塑彈性體(Architecture III)這個想法。這類第三代熱塑性彈性體將無規(guī)共聚物作為側(cè)鏈, 可以制備一系列具有不同力學(xué)性能的熱塑性彈性體，這是第一代和第二代熱塑性彈性體所欠缺的。我們使用電子轉(zhuǎn)移活化再生催化劑原子轉(zhuǎn)移自由基聚合方法 (ARGET ATRP) 制備了一系列具有不同纖維素含量(0.9-3.4 wt%)基于纖維素剛性主鏈的接枝無規(guī)共聚物的熱塑性彈性體 (cellulose-g-P(BA-co-MMA) graft copolymers)，并對其進行了細致的結(jié)構(gòu)和性能關(guān)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.