摘要
以异戊橡胶双釜凝聚为例,分别采用穷举法模拟计算和数值微分法计算机处理,对首釜温度T_1=75—105℃和首釜压力p1=0.10—0.30MPa下的凝聚参数进行了计算,计算结果基本一致,与实验数据相吻合。当p1=0.18MPa、T_1为90℃左右时,总水蒸汽耗量S为最小,若以总凝聚时间H为优化目标,则T_1=94℃,其关联式为T_1=78.979 7 R_1+57.092 4lg p1+122.2409,该式适用于以己烷为溶剂的其他合成橡胶的凝聚过程。当p1=0.10MPa、T_1=94—95℃时,H为最小;若以H为优化目标,则T_1=94℃。如综合考虑S和H,则T_1和p1的最佳值分别为80℃和0.11 MPa,其关联式为p1=0.00514 T_1-0.2986,此时S和H分别为2.61kg/kg胶和1.46h,求得综合目标函数J=Sφ+H(1-φ)。
The phase equilibrium during stripping of multiphase polymer solution system containing polymer, solvent and water was investigated.It was found that, when the conoentration of polymer in the solution was within the range of 20%-30% ( volume ), the polymer solution could be treated as a pure solvent, and the type of polymer had basically no effect on the phase equilibrium.Kinetic models were established for the constant and drop rate stages of coagulation process by using rare-earth catalyzed polyisoprene rubber solution as an instance.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1990年第2期88-93,共6页
China Synthetic Rubber Industry
关键词
聚合物溶液
凝聚
聚异戊二烯
polymer solution
stripping
phase equilibrium
chemical kinetics
mathematical model
