基于Simha Somcynsky状态方程的高分子.pdf

58 1 Vol1 58 No1 1 2007 1 Journal of Chemical Industry and Engineering ( China) January 2007 imha- omcynsky - 吕宏凌, 王保国, 杨基础 ( , 100084) : imha- omcynsky Vrentas-Duda , , , , , : ; ; ; : T Q 0281 8 : A : 0438- 1157 (2007) 01- 0010- 05 A diffusion coefficient model for polymer-solvent systems based on imha- omcynsky equation-of-state LB Hongling, WANG Baoguo, YA NG Jichu ( Dep artment of Chemical E ngineering , Tsinghua Univ ersity , Beij ing 100084, China) Abstract: With the introduction of the imha- omcynsky ( ) equation-of-state ( EO ) into the Vrentas-Duda model, a modified diffusion coefficient model based on the EO w as developed for polymer- solvent systems1 In the modified model, the measurement of polymer viscoelasticity w as not required, and the parameters related to the polymer could be determined solely by the characteristic parameters of temperature and volume in the EO 1Therefore, it has better predictive capability compared w ith the original model1T he calculated diffusion coefficients of benzene, toluene, ethylbenzene and chloroform in polystyrene, polyisobutylene and poly( vinyl acetate) indicated that predictions of the modified model w ere consistent w ith the experimental results. Key w ords: polymer; solvent; diffusion coefficient; equation-of-state ( EO ) , , , , , , 2005- 12- 11 , 2006- 04- 24