碳氢烧蚀层的厚度对聚乙烯醇薄膜阻气性能的影响
Effect of thickness of hydrocarbon burning layer on gas barrier permeability of polyvinyl alcohol film
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摘要: 以ICF实验塑料靶丸保气的需求为背景，研究了水蒸气在低压等离子体聚合碳氢（CH）膜、聚乙烯醇（PVA）膜、聚苯乙烯（PS）膜中的扩散渗透行为。根据实验数据，算出在40℃ 90%相对湿度下,水蒸气在三种样品膜中的渗透系数分别为1.906×10-13，5.950×10-15，.432×10 -14mol·m/(m2·s·Pa)，并借助多层复合膜模型的近似算法，算出在40 ℃ 90%相对湿度的外界环境下，类似多层塑料微球结构的三层复合膜中，PVA阻气层所处环境的相对湿度为53.06%，推导出PVA所处环境的相对湿度与外层CH层厚度的关系式。研究表明：CH烧蚀层越厚，PVA所处环境的相对湿度越小，保气性能越好。Abstract: Considering gases retention in plastic microsphere in ICF experiment,the diffusion and permeation behavior of water vapor in hydrocarbon (CH) film,polyvinyl alcohol (PVA) film and polystyrene (PS) film at 40 ℃ 90% relative humidity was studied in this paper. On the basis of experimental data, the permeatibility coefficients of water vapor in three films were worked out,which are separately 1.906×10－13，5.950×10－15，3.432×10－14 mol·m/(m2·s·Pa)，.And the relative humidity of middle layer (PVA) of 53.06% in threelayer structure, which is analogous to multilayer plastic microsphere's, under 40 ℃ 90% relative humidity environmental condition was figured out using an approximate model of multilayer packaging structure. Moreover,the relationship between thickness of CH film and relat
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Key words:
- pva (polyvinyl alcohol) film /
- water vapor /
- permeability coefficient /
- relative humidity
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