摘要
用Voigt蠕变模型和Flory-Huggins混合模型分别计算溶剂在高分子膜中吸收和解吸过程高分子的蠕变及与溶剂混合的吉氏函数变化,结合质量守恒建立了一个小分子在玻璃态聚合物中吸收和解吸的传递模型,模拟计算结果和对实际系统的吸收和解吸曲线的关联和预测结果表明,模型能很好地描述实验中常遇到的S形吸收曲线,并能根据吸收曲线的实验信息预测相应的解吸曲线。与Crank模型比较,此模型具有参数少而灵活的优点。
Combining the Voigt creep model of viscoelastic solid and Flory - Huggins mixing model which are used to calculate the Gibbs free energy contributed by creep of polymer and mixing of polymer and penetrants, respectively, a transport model of penetrants in polymer membrane was established. The effect of model parameters on the sorption and desorption curves was simulated. The model can satisfactorily correlate the experimental sigmoid sorption curves and predict the corresponding desorption curves. It is shown that this model is more flexible and fewer model parameters are required as compared with Crank's model.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1997年第6期653-659,共7页
CIESC Journal
基金
国家自然科学基金资助项目(No.29506044)
关键词
传递模型
蠕变
吸收
解吸
高分子膜
溶剂
transport model, diffusion coefficient, creep, sorption, desorption, polymer membrane
