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
Key words
group contribution/refractive index/model/polymethylphenylsiloxane/molecular weight
维普
万方数据