One-pot synthesis of ABC type triblock copolymers via in situ click [3+2] and Diels-Alder [4+2] reactions
One-pot synthesis of ABC type triblock copolymers via in situ click [3+2] and Diels-Alder [4+2] reactions
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DOI：
10.1021/ma061819l
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发表时间：
2007-01-23
期刊：
影响因子：
5.5
通讯作者：
Tunca, Umit
中科院分区：
文献类型：
--
作者：
Durmaz, Hakan;Dag, Aydan;Tunca, Umit
本文报道了一锅法合成聚（乙二醇）-（PEG-）聚苯乙烯-（PS-）聚（甲基丙烯酸甲酯）（PMMA）和聚（ε-己内酯）-（PCL-）PS-PMMA ABC三嵌段共聚物的方法。为此目的，将呋喃保护的马来酰亚胺末端官能化的PMMA、具有α-蒽和ω-叠氮化物末端官能度的PS以及具有炔末端官能团的PEG或PCL在N，N-二甲基甲酰胺（DMF）中在120 ° C下反应36小时，以得到相应的三嵌段共聚物。除了PEG，所有具有窄分子量分布和明确的链端官能度的聚合物前体都是通过活性聚合方法实现的。所得聚合物通过H-1 NMR（250 MHz）、凝胶渗透色谱（GPC）和差示扫描量热法（DSC）测量进行表征。
We report a one-pot synthesis of ABC triblock copolymers of poly(ethylene glycol)- (PEG-) polystyrene- (PS-) poly(methyl methacrylate) (PMMA), and poly(epsilon-caprolactone)- (PCL-) PS-PMMA by combining in situ click [3 + 2] and Diels-Alder [4 + 2] reactions. For this purpose, furan-protected maleimide end-functionalized PMMA, PS with alpha-anthracene and omega-azide end-functionality, and PEG or PCL with an alkyne end-functional group were reacted in N,N-dimehtylformamide (DMF) for 36 h at 120 degrees C in order to give the corresponding triblock copolymers. All polymeric precursors with narrow molecular weight distribution and well-defined chain-end functionalities were achieved from living polymerization methods, except PEG. The obtained polymers were characterized by H-1 NMR (250 MHz), gel permeation chromatography (GPC), and differential scanning calorimetry (DSC) measurements.