Ternary Graft Copolymers and Their Use in Nanocapsule Preparation
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- 作者：Feng Liu ; Jiwen Hu ; Guojun Liu ; Chengmin Hou ; Shudong Lin ; Hailiang Zou ; Ganwei Zhang ; Jianping Sun ; Hongsheng Luo ; Yuanyuan Tu
- 刊名：Macromolecules
- 出版年：2013
- 出版时间：April 9, 2013
- 年：2013
- 卷：46
- 期：7
- 页码：2646-2657
- 全文大小：573K
- 年卷期：v.46,no.7(April 9, 2013)
- ISSN：1520-5835
文摘
Grafting three types of polymer chains onto the backbone of a fourth polymer yielded a ternary graft copolymer. The copolymer dispersed oil droplets in water with one type of graft stretching into the oil phase, the second type forming a thin membrane separating the two phases, and the third type stretching into the water phase. Since the second type was also photo-cross-linkable, shining UV light on the system produced permanent nanocapsules. To produce the graft copolymer, the backbone polymer used was poly(3-azido-2-hydroxypropyl methacrylate), P(GMA-N3). The grafts used were all end-functionalized by alkyne groups, and the polymers were poly(ethylene glycol) methyl ether (MPEG), polystyrene (PS), and poly(2-cinnamoyloxyethyl methacrylate) (PCEMA), respectively. Evidently, MPEG was water-soluble, PS was soluble in the used oil decahydronaphthalene (DN), and PCEMA was photo-cross-linkable and soluble in neither water nor DN. The grafts denoted as MPEG鈥揅鈮H, PS鈥揅鈮H, and PCEMA鈥揅鈮H were coupled to P(GMA-N3) via click chemistry between the azide and alkyne units. Under the used conditions, the one-pot grafting reactions were quantitative.