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134. Synthesis and characterization of designed cellulose-graft-polyisoprene copolymers
作者:Zhongkai Wang, Yaqiong Zhang, Feng Jiang, Huagao Fang and Zhigang Wang*
關(guān)鍵字:纖維素接枝聚異戊二烯,合成,表征
論文來源:期刊
具體來源:Polym. Chem., 2014, 5(10), 3379-3388
發(fā)表時間:2014年

在本文中我們報道了一種精心設(shè)計的新型接枝共聚物,該共聚物源自具備相反物理性質(zhì)的兩種豐富的天然高分子:剛性且親水的纖維素和柔性且疏水的合成聚異戊二烯(天然橡膠的類似物),該接枝共聚物將剛性和柔性,疏水性和親水性有機(jī)結(jié)合在一個大分子中。所設(shè)計的纖維素-接枝-聚異戊二烯共聚物(Cell-g-PI)是通過均相補充催化劑和還原劑原子轉(zhuǎn)移自由基聚合(SARA ATRP)合成的。FT-IR, 1H NMR,13C NMRTGA測試表明Cell-g-PI共聚物被成功制備。TEMDMA實驗結(jié)果說明在Cell-g-PI共聚物中發(fā)生微相分離。水接觸角測試證明Cell-g-PI的疏水性隨著聚異戊二烯側(cè)鏈長度增加而增大。此外,通過自組織沉淀法可以制備水相中的核-殼結(jié)構(gòu)的Cell-g-PI納米粒子。



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.

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