Simultaneous Click Chemistry and Atom Transfer Radical Emulsion Polymerization and Prepared Well-Defined Cross-Linked Nanoparticles
Simultaneous Click Chemistry and Atom Transfer Radical Emulsion Polymerization and Prepared Well-Defined Cross-Linked Nanoparticles
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DOI：
10.1021/ma901019r
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发表时间：
2009-08
期刊：
影响因子：
5.5
通讯作者：
L. Xu;F. Yao;G. Fu;Liang Shen
中科院分区：
文献类型：
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作者：
L. Xu;F. Yao;G. Fu;Liang Shen
这项工作首次报道了同时“点击化学”和原子转移自由基乳液聚合（ATREP）来制备明确的大分子和交联纳米颗粒。首先，在对二叠氮存在下，使用 2-溴异丁酸炔丙酯 (PBiB) 作为引发剂、Tween-20 作为乳化剂、溴化铜 (I) 催化剂和五甲基二乙烯三胺 (PMDETA) 作为配体，同时进行苯乙烯的“点击化学”和 ATREP。共享相同催化剂体系的同步反应产生了具有受控分子量和窄分子量分布的二嵌段聚苯乙烯（PS）。所得聚合物通过凝胶渗透色谱 (GPC)、FT-IR 和 1 H NMR 光谱进行表征。然后，使用 4,4-双((2'-溴-2'-甲基丙酰氧基)甲基)-1,6-庚二炔 (BM...
Simultaneous “click chemistry” and atom transfer radical emulsion polymerization (ATREP) to prepare well-defined macromolecules and cross-linked nanoparticles are first reported in this work. First, simultaneous “click chemistry” and ATREP of styrene were conducted in the presence of p-xylylene diazide, using propargyl 2-bromoisobutyrate (PBiB) as initiator, Tween-20 as emulsifier, copper(I) bromideas catalyst, and pentamethyldiethylenetriamine (PMDETA) as ligand. The simultaneous reactions sharing a same catalyst system gave rise to diblock polystyrene (PS) with controlled molecular weight and narrow molecular weight distribution. The resulting polymers were characterized by gel permeation chromatography (GPC), FT-IR, and 1H NMR spectroscopy. Then, well-defined cross-linked PS nanoparticles with diameter in the range of 50−150 nm were prepared from a simultaneous “click chemistry” and ATREP of a mixed styrene and 4-vinylbenzyl azide using 4,4-bis((2′-bromo-2′-methylpropionyloxy)methyl)-1,6-heptadiyne (BM...