缩水甘油
单体
化学
催化作用
聚合
开环聚合
高分子化学
氰化物
支化(高分子化学)
溶剂
动力学
有机化学
聚合物
量子力学
物理
作者
Chinh Hoang Tran,Min Woong Lee,Suna Kim,Han Byul Jang,Il Kim
出处
期刊:Macromolecules
[American Chemical Society]
日期:2020-03-12
卷期号:53 (6): 2051-2060
被引量:24
标识
DOI:10.1021/acs.macromol.9b02373
摘要
Polyglycidols of tunable degree of branching (DB) have been synthesized via ring-opening multibranching polymerization (ROMBP) of glycidol in the absence of any initiators using heterogeneous double metal cyanide (DMC) catalysts. Semi-branched polyglycidols of low DB (less than 0.3) are obtained using simple solvent-free batch polymerizations, whereas hyperbranched analogues of high DB (more than 0.5) are achieved employing semi-batch (or slow monomer addition) polymerizations. The rate of DMC-catalyzed ROMBPs of glycidol shows the first-order dependences on monomer and catalyst concentrations, suggesting that the ROMBPs proceed via a coordinative mechanism. The formation of propagating species and the resultant microstructural units are clarified using a conversion versus time analysis in the NMR-scale.
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