| 溶剂分子透过HDPE/MPA层状共混物的扩散模型 |
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| 引用本文： | 王车礼,承民联,裘兆蓉. 溶剂分子透过HDPE/MPA层状共混物的扩散模型[J]. 化工学报, 2002, 53(11): 1160-1163 |
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| 作者姓名： | 王车礼 承民联 裘兆蓉 |
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| 作者单位： | 江苏石油化工学院化工系 |
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| 基金项目： | 中国石油化工 (集团 )公司资助项目 (No 4960 0 7)~~ |
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| 摘 要： | 建立了溶剂分子透过聚合物层状共混物的扩散模型 ,给出了溶剂分子相对有效扩散系数D0 /D与分散相体积分数、不可透薄片形状参数α以及薄片接头缺口参数δ之间的关系式 .经采用不同值及α值共混物得到的实验数据证明 ,该模型与实验结果吻合良好.
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| 关 键 词： | 溶剂分子 层状共混物 聚合物共混物 HDPE／MPA 阻透性能 层状结构 扩散模型 改性尼龙 高密度聚乙烯 |
| 文章编号： | 0438-1157(2002)11-1160-04 |
| 修稿时间： | 2001-03-13 |
DIFFUSION MODEL IN BARRIER MEMBRANES |
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| WANG Cheli,CHENG Minlian,QIU Zhaorong. DIFFUSION MODEL IN BARRIER MEMBRANES[J]. Journal of Chemical Industry and Engineering(China), 2002, 53(11): 1160-1163 |
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| Authors: | WANG Cheli CHENG Minlian QIU Zhaorong |
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| Abstract: | Membranes which contain impermeable flakes or lamellae can show permeabilities much lower than conventional membranes. The variation of membrane permeability with flake volume fraction φ,flake aspect ratio α and slit aspect ratio δ is studied in this paper,and a new diffusion model in the barrier membranes is suggested:D 0/D=1/δ+α2φ2/(1-φ).This model is verified by the diffusion experiments of varying flake volume fraction φ and varying aspect ratio α . It can be concluded that the diffusion is greatly retarded by two factors: the tight slits between the flakes,and the tortuous wiggles to get around the flakes. The 1/δ is the effect of the slits which decreases the cross-sectional area through which diffusion can occur,while the α2φ2/(1-φ) is the effect of the wiggles which both decrease the cross-sectional area and increase the length for diffusion through the barrier membrane. |
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| Keywords: | polymer blends HDPE/MPA barrier property laminar structure diffusion model |
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