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134. Synthesis and characterization of designed cellulose-graft-polyisoprene copolymers
writer:Zhongkai Wang, Yaqiong Zhang, Feng Jiang, Huagao Fang and Zhigang Wang*
keywords:纤维素接枝聚异戊二烯,合成,表征
source:期刊
specific source:Polym. Chem., 2014, 5(10), 3379-3388
Issue time:2014年

在本文中我们报道了一种精心设计的新型接枝共聚物,该共聚物源自具备相反物理性质的两种丰富的天然高分子:刚性且亲水的纤维素和柔性且疏水的合成聚异戊二烯(天然橡胶的类似物),该接枝共聚物将刚性和柔性,疏水性和亲水性有机结合在一个大分子中。所设计的纤维素-接枝-聚异戊二烯共聚物(Cell-g-PI)是通过均相补充催化剂和还原剂原子转移自由基聚合(SARA ATRP)合成的。FT-IR, 1H NMR,13C NMRTGA测试表明Cell-g-PI共聚物被成功制备。TEMDMA实验结果说明在Cell-g-PI共聚物中发生微相分离。水接触角测试证明Cell-g-PI的疏水性随着聚异戊二烯侧链长度增加而增大。此外,通过自组织沉淀法可以制备水相中的核-壳结构的Cell-g-PI纳米粒子。



In this work, we report an elegant design of novel graft copolymers based on two natural abundant biopolymers with opposite physical properties: rigid and hydrophilic cellulose, and flexible and hydrophobic synthesized polyisoprene (analogue of natural rubber), which combines rigidity and flexibility, hydrophobicity and hydrophilicity all in one macromolecule. These cellulose-graft-polyisoprene (Cell-g-PI) copolymers were synthesized via homogenous supplemental activator and reducing agent atom transfer radical polymerization (SARA ATRP). FT-IR, 1H NMR, 13C NMR and TGA measurements demonstrate that Cell-g-PI copolymers are successfully prepared. TEM and DMA results illustrate that phase separation occurs in Cell-g-PI copolymers. Water contact angle measurements verify that their hydrophobicity increases with increasing polyisoprene side chain length. In addition, the core–shell Cell-g-PI nanoparticles in water can be prepared via a self-organized precipitation (SORP) method.