The manufacturing process of poly（vinylidene fluoride） microporous films containing through flow channels and permeable to liquids has been elaborated. The process is based on polymer melt extrusion with subsequent stages of annealing, uniaxial extensions（"cold" and "hot" drawing）, and thermal stabilization. The effect of orientation parameters（melt draw ratio and extension degrees） on overall porosity, permeability, morphology, and content of polar piezoactive β-phase in crystalline structure of the films was investigated by filtration porosimetry, sorptometry, scanning electron microscopy, X-ray scattering, and mechanical properties measurements. It is shown that the through pores were formed by a percolation mechanism. It is observed that permeability and the β-phase content increased with the growth of extension degree at the pore formation stages but the portion of β-crystallites decreased with increasing melt draw ratio at extrusion, which permitted to regulate the combination of through permeability and piezoactivity values by variation of the preparation process parameters.
类型: 期刊论文
作者: G.K.Elyashevich,I.S.Kuryndin,I.Yu.Dmitriev,V.K.Lavrentyev,N.N.Saprykina,V.Buko?ek
来源: Chinese Journal of Polymer Science 2019年12期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 有机化工
单位: Institute of Macromolecular Compounds, Russian Academy of Sciences,Faculty for Natural Sciences and Engineering, University of Ljubljana
分类号: TQ325.4
页码: 1283-1289
总页数: 7
文件大小: 770K
下载量: 9
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