聚苯基甲基硅氧烷分子量-折射率模型研究  

Study on molecular weight-refractive index model of polymethylphenylsiloxane

作　　者：钟东霖 介素云[1] 杜淼[3] 潘鹏举[1,2] 单国荣 ZHONG Donglin;JIE Suyun;DU Miao;PAN Pengju;SHAN Guorong(State Key Laboratory of Chemical Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;Institute of Zhejiang University-Quzhou,Quzhou 324000,Zhejiang,China;Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China)

机构地区：[1]化学工程联合国家重点实验室,浙江大学化学工程与生物工程学院,浙江杭州310058 [2]浙江大学衢州研究院,浙江衢州324000 [3]浙江大学高分子科学与工程学系,浙江杭州310058

出　　处：《化工学报》2024年第1期190-196,共7页CIESC Journal

基　　金：国家自然科学基金面上项目(52173024);山西浙大新材料与化工研究院研发项目(2022SZ-TD008)。

摘　　要：聚硅氧烷是应用广泛的一种特种有机硅材料,折射率是衡量聚硅氧烷性能的重要指标。应用基团贡献法建立了适用于聚苯基甲基硅氧烷体系的分子量-折射率模型,结合自由体积理论对模型进行了修正。修正后的模型能够根据分子量和温度有效地预测聚苯基甲基硅氧烷的折射率,相对误差在±0.2%范围内。根据修正后的模型阐述了分子量、温度对折射率的影响:折射率随着分子量的增大而升高,最终趋于一定值;折射率随着温度的升高明显下降。研究结果可为高折射率聚硅氧烷的设计与合成提供参考。Polysiloxane is a special silicone material that is widely used.The refractive index is an important indicator for measuring the performance of polysiloxane.A molecular weight-refractive index model suitable for polymethylphenylsiloxanes has been established by using the group contribution method and optimized based on the free volume theory.The optimized model can effectively predict the refractive index of polymethylphenylsiloxanes from molecular weight and temperature,with a relative error within±0.2%.The influence of molecular weight and temperature on refractive index has been explained by the optimized model:the refractive index increases with the increase of molecular weight and eventually tends to a certain value;the refractive index decreases significantly with the increase of temperature.The relevant results are significant for the design and synthesis of polysiloxanes with high refractive index.

关 键 词：基团贡献 折射率 模型 聚苯基甲基硅氧烷 分子量 

分 类 号：TQ314.2[化学工程—高聚物工业]