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首页> 外文期刊>Journal of Applied Polymer Science >Online monitoring of reaction temperature during cationic ring opening polymerization of epichlorohydrin in presence of BF_3 and 1,4-butanediol
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Online monitoring of reaction temperature during cationic ring opening polymerization of epichlorohydrin in presence of BF_3 and 1,4-butanediol

机译：在BF_3和1,4-丁二醇存在下环氧氯丙烷阳离子开环聚合反应温度的在线监测

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摘要

This work introduces cationic ring opening polymerization of polyepichlorohydrin (PECH) produced under various reaction conditions (set temperature: -10 to 40°C, [C]/[I] ratio: 0.1-1, monomer feed rate: 1-4 mL/min). In addition, a correlation between the exothermic reaction temperature and the performance of the PECH was obtained by utilizing a reaction temperature monitoring system, GPC, ~1H-NMR, and FTIR. During the polymerization, an induction period which affects the polydispersity was observed below 10°C. At lower temperatures and lower [C]/[I] ratios, a higher induction period was observed. The monomer feed rate did not affect the induction period but it highly affected the polydispersity when the induction period occurred. The total molecular weight of PECH increased with decreasing set temperature even though the amount of low molecular weight cyclic oligomer increased.
机译：这项工作介绍了在各种反应条件下（设定温度：-10至40°C，[C] / [I]比例：0.1-1，单体进料速率：1-4 mL /分钟）。此外，通过利用反应温度监测系统，GPC，〜1H-NMR和FTIR获得了放热反应温度与PECH性能之间的相关性。在聚合过程中，在10℃以下观察到影响多分散性的诱导期。在较低的温度和较低的[C] / [I]比下，观察到较高的诱导期。单体进料速率不影响诱导期，但是当诱导期发生时，它极大地影响多分散性。即使低分子量环状低聚物的量增加，PECH的总分子量也随着设定温度的降低而增加。

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