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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and characterization of PMMA-b-PBMA block copolymers by atom transfer radical polymerization
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Synthesis and characterization of PMMA-b-PBMA block copolymers by atom transfer radical polymerization

机译：原子转移自由基聚合法合成PMMA-b-PBMA嵌段共聚物及其表征

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The synthesis of diblock copolymers using atom transfer radical polymerization, ATRP, of n-butyl methacrylate, BMA, and methyl methacrylate, MMA, is reported. These copolymers were prepared from 2-bromoisobutyryl-terminated macroinitiators of poly(MMA) and poly(BMA), using copper chloride, CuCl,/N,N,N',N",N"-pentamethyldiethylenetretramine, PMDETA, as the catalyst system, at 100degreesC in bulk and in benzonitrile solution. The block copolymers were characterized by means of size-exclusion chromatography, SEC, and H-1-NMR spectroscopy. The SEC analysis of the synthesized diblock copolymers confirmed important differences in the molecular weight control depending on the reaction medium (solvent effect) and the chemical structure of the macroinitiator used. In addition, differential scanning calorimetry, (DSC) measurements were performed, showing for all the copolymers a phase separation, (C) 2002 Wiley Periodicals, Inc. [References: 38]
机译：据报道，使用甲基丙烯酸正丁酯（BMA）和甲基丙烯酸甲酯（MMA）的原子转移自由基聚合反应（ATRP）合成二嵌段共聚物。这些共聚物由聚（MMA）和聚（BMA）的2-溴异丁酰基封端的大分子引发剂，使用氯化铜，CuCl，/ N，N'N'，N“，N”-五甲基二亚乙基三胺，PMDETA作为催化剂体系制备，在100摄氏度下散装在苄腈溶液中。借助尺寸排阻色谱，SEC和H-1-NMR光谱对嵌段共聚物进行表征。合成二嵌段共聚物的SEC分析证实，取决于反应介质（溶剂效应）和所用大分子引发剂的化学结构，分子量控制方面存在重要差异。另外，进行了差示扫描量热法（DSC）测量，显示了所有共聚物的相分离，（C）2002 Wiley Periodicals，Inc. [参考文献：38]

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