化工学报2013，Vol.64Issue(2)：725-729,5.DOI:10.3969/j.issn.0438-1157.2013.02.043
4,4'/2,4'-二苯基甲烷二异氰酸酯/多元醇本体聚合流变动力学
Rheokinetics of 4,4'/2,4'-diphenylmethane diisocyanate/polyols bulk polymerization
郭俊溢 1包永忠1
作者信息
- 1. 浙江大学,化学工程联合国家重点实验室,浙江杭州310027
- 折叠
摘要
Abstract
Bulk polymerizations of 4, 4'/2·4'-diphenylmethane diisocyanate/polytetramethylene ether glycol/1,4-butylene glycol without and with the addition of Bi/Zn composite catalyst were carried out to synthesize thermoplastic polyurethane (TPU) in a torque rheometry to simulate twin-screw extruder conditions, and the rheokinetics of polymerization process was investigated. The relations between torque and weight average molecular weight (Mw) of TPU were corrected based on two-dimensional flow simplification, correction between melt viscosity and molecular weight, and Arrhenius equation. The rheokinetics model was used to fit the variation of Mw of TPU during polymerization. The fitted Mwof TPU showed good agreement with that determined by gel permeation chromatography. The rheokinetic model could quickly provide real-time fitting results of Mw of TPU from the torque for the whole synthesis process.关键词
4,4'/2,4'-二苯基甲烷二异氰酸酯/热塑性聚氨酯/转矩流变仪/流变动力学/平均分子量Key words
4, 4'/2, 4'-diphenylmethane diisocyanate/thermoplastic polyurethane/torque rheometer/rheokinetics/average molecular weight分类
化学化工引用本文复制引用
郭俊溢,包永忠..4,4'/2,4'-二苯基甲烷二异氰酸酯/多元醇本体聚合流变动力学[J].化工学报,2013,64(2):725-729,5.
