文献类型：期刊文献

中文题名：NKC-9催化环硅氧烷开环聚合动力学及其建模研究

英文题名：Kinetics and modeling of NKC-9-catalyzed ring-opening polymerization of cyclosiloxanes

作者：朱文豪[1];罗琦[1];张寅旭[2];李锦锦[1];奚桢浩[1];赵玲[1]

机构：[1]化学工程与低碳技术全国重点实验室,华东理工大学化工学院,上海200237;[2]合盛硅业鄯善有限公司,新疆吐鲁番838200

年份：2026

卷号：77

期号：1

起止页码：406

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：;EI(收录号：20262621014920);北大核心:【北大核心2023】；

基金：新疆科技厅/自治区重点研发任务专项(2022B01030-2);国家自然科学基金项目(22378116)。

语种：中文

中文关键词：环硅氧烷;开环聚合;动力学模型;可控制备

外文关键词：cyclosiloxane;ring-opening polymerization;kinetic modeling;controlled preparation

摘要：环硅氧烷开环聚合是制备聚二甲基硅氧烷等有机硅材料的主要方法,其动力学行为直接影响产品性能。本文以大孔型强酸性阳离子交换树脂NKC-9为催化剂,通过^(1)H NMR测定不同反应时间的单体转化率,基于建立的聚合动力学模型,拟合获得正、逆反应速率常数及活化能,揭示温度对聚合速率及控制步骤的影响。基于动力学规律,进一步建立简化模型,系统考察了温度、催化剂用量对单体转化率的影响,并基于Arrhenius方程计算表观增长速率常数的活化能。结果表明,反应符合一级动力学。研究为固体酸催化环硅氧烷聚合工艺优化以及聚二甲基硅氧烷的可控制备提供了理论依据。
Ring-opening polymerization of cyclosiloxane is a facile approach for the preparation of organosilicon materials such as polydimethylsiloxane,and its kinetic behavior directly affects the product properties.In this work,a kinetic model was established for the polymerization system using macroporous acidic cation exchange resin NKC-9 as catalyst.The monomer conversion was measured by ^(1)H NMR,and the kinetic model was applied to obtain the forward and reverse reaction rate coefficients and activation energies,which reveal the effect of temperature on the polymerization rate and the control steps.Based on the kinetic laws,a simplified model was further established to systematically investigate the effects of temperature and catalyst dosage on the monomer conversion rate.The activation energy of the apparent growth rate constant was calculated based on the Arrhenius equation.The results show that the polymerization follows first-order kinetics.This study provides a theoretical basis for process optimization of solid acid-catalyzed polymerization of cyclosiloxane and the controlled preparation of polysiloxanes.