食品用聚烯烃的自由体积对迁移物扩散系数的影响

1.江南大学包装工程系,江苏,无锡,214122

2.江南大学包装工程系,江苏,无锡,214122;暨南大学包装工程研究所,广东,珠海,519070

基金项目: 广东省珠海市科技计划(PB20051013) 北京市重点实验室基金(KF060402)

Effect of Free Volume in Polyolefins on Diffusion Coefficient of Migratory Substances

根据Vrentas-Duda自由体积理论,从"微观"角度解释了渗透质在结晶聚烯烃中的扩散.从自由体积的角度借助于已公开发表的实验数据分析了温度、聚合物密度、迁移物分子结构和溶胀对扩散系数的影响.阐述了迁移物在聚烯烃薄膜中的扩散机理.

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