摘要
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。
Migration of monomers, oligomers, additives and degradation product of macromolecule from plastic packaging materials into food will produce potential damage for human body, thus it is of universal significance to study on it. This paper explained the diffusion of migratory substances from crystalline polyolefins from microcosmic view according to Vrentas-Duda free-volume theory, discussed the effect of temperature, density of polyolefins, molecular structure of migratory substances and swelling on diffusion coefficient. In addition, this paper also narrated the diffusion mechanism.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第4期19-22,共4页
Polymer Materials Science & Engineering
基金
珠海市科技计划项目(PB20051013)
北京市重点实验室开放研究课题基金(KF060402)
关键词
聚烯烃
自由体积
扩散系数
迁移
polyolefins
free-volume
diffusion coefficient
migration
