| PHASE SEPARATION AND MICROVOID FORMATION AT PHASE INTERFACES OF HYDROPHOBIC-HYDROPHILIC POLYMER BLENDS DURING WET PROCESSING |
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| 作者姓名： | 郑亚国 周鈜 |
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| 作者单位： | Department of Textile Chemical Engineering，Department of Textile Chemical Engineering |
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| 摘 要： | In this paper,morphological structure,thermodynamic compatibility and relationship be-tween porosities and blend ratios of the wet coagulated PU/PVA sheets were studied by meansof observation of scanning electronic micrographies,tests of dynamic mechanical properties,moisture regain and vapor permeability.Furthermore,the formation of microvoids at interfacesof separated phases was discussed and a microvoid formation mechanism at phase interfaces ofhydrophobic-hydrophilic blends was suggested and compared with that ofhydrophobic-hydrophobic blends.
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PHASE SEPARATION AND MICROVOID FORMATION AT PHASE INTERFACES OF HYDROPHOBIC-HYDROPHILIC POLYMER BLENDS DURING WET PROCESSING |
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| Zheng Yaguo Zhou Hong.PHASE SEPARATION AND MICROVOID FORMATION AT PHASE INTERFACES OF HYDROPHOBIC-HYDROPHILIC POLYMER BLENDS DURING WET PROCESSING[J].Journal of Donghua University,1989(Z1). |
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| Authors: | Zheng Yaguo Zhou Hong |
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| Institution: | Department of Textile Chemical Engineering |
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| Abstract: | In this paper,morphological structure,thermodynamic compatibility and relationship be- tween porosities and blend ratios of the wet coagulated PU/PVA sheets were studied by means of observation of scanning electronic micrographies,tests of dynamic mechanical properties, moisture regain and vapor permeability.Furthermore,the formation of microvoids at interfaces of separated phases was discussed and a microvoid formation mechanism at phase interfaces of hydrophobic-hydrophilic blends was suggested and compared with that of hydrophobic-hydrophobic blends. |
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| Keywords: | phase separation interface hydrophobic hydrophilic polyurethane polyvinyl alcohol wet process porosity microvoid polymer blend |
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