通过测定压力的方法研究了乙烯、正己烷和异戊烷在三种不同结晶度聚乙烯中的溶解度,分析了结晶度、小分子物性以及温度对该过程的影响.得到温度60℃～90℃,乙烯0～2 MPa,正己烷19 kPa～100 kPa,异戊烷80 kPa～300 kPa范围内三者各自在聚乙烯样品中的溶解度数据.结果表明,乙烯溶解度呈线性,符合Henry定律;正己烷和异戊烷的溶解度呈非线性.聚乙烯结晶度20%～72%范围内,有机小分子在聚乙烯中的溶解度随结晶度的增加而减小.溶解度随压力增加和温度的减小而增加.
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