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 NMR和TGA测试表明Cell-g-PI共聚物被成功制备。TEM和DMA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.