文献类型：期刊文献

英文题名：Telomerization of butyl methacrylate and 1-octadecanethiol by reactive extrusion

作者：Chen, Jianding[2]; Chalamet, Yvan[1]; Taha, Mohamed[1]

机构：[1]Univ St Etienne, CNRS, FRE 2396, Lab Rheol Mat Plast, F-42023 St Etienne 2, France;[2]E China Univ Sci & Technol, Inst Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2003

卷号：288

期号：4

起止页码：357

外文期刊名：MACROMOLECULAR MATERIALS AND ENGINEERING

收录：;EI(收录号：2003217472691);WOS:【SCI-EXPANDED(收录号:WOS:000182694000007)】；

语种：英文

外文关键词：butyl methacrylate; kinetics (polym.); telomerization; reactive extrusion; residence time distribution

摘要：Full paper: Butylmethacrylate and 1-octadecanethiol telomers were prepared by radical reactive extrusion. The main advantages of the use of this processing technique are that mass reactions can be conducted and continuous production is achieved within a reduced reaction time and a correct temperature control. Preliminary studies concerned the choice of the reactants for the telomerization reaction and the adaptation of the telomerization reaction to the reactive extrusion process. The transfer constant to C18H37SH was measured, and then experimental studies were conducted to verify that the hypothesis and approximations made for kinetic modeling are realistic. Particularly, it was shown that the use of relatively high chain-transfer agent to monomer concentration ratio had no perceptible effect on the monomer conversion kinetic. These reaults allowed the choice of reaction extrusion conditions. Telomers were prepared using a laboratory co-rotating twin-screw extruder. The effect of reaction conditions ( temperature, 1-octadecanethiol to monomer concentration ratio) and of processing conditions ( throughout, screw rotation speed) on the residence time distributions, molar mass ams monomer conversions were examined. This study allowed the continuous synthesis of butyl methacrylate telomers having variable controlled molar masses and complete monomer conversion.