| BARRIER PROPERTIES OF VINYLIDENE CHLORIDE COPOLYMERS |
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| 作者姓名： | 李悦生 翁志学 黄志明 潘祖仁 |
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| 作者单位： | Changchun Institute of Applied Chemistry，Chinese Academy of Sciences，Changchun 130022，Institute of Polymer Science and Engineering，Zhejiang University，Hangzhou 310027，Institute of Polymer Science and Engineering，Zhejiang University，Hangzhou 310027，Institute of Polymer Science and Engineering，Zhejiang University，Hangzhou 310027 |
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| 基金项目： | The project is supported by the National Natural Science Foundation of China and the Natural Science Foundation of Postdoctoral Project. |
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| 摘 要： | The permeability coefficients of a series of copolymers of vinylidene chloride (VDC)with methyl acrylate (MA), butyl acrylate (BA) or vinyl chloride (VC) (as comonomer)to oxygen and carbon dioxide have been measured at 1.0 MPa and 30℃, while those towater vapor have been measured at 30℃ and 100% relative humidity All the copolymersare semicrystalline. VDC/MA copolymers have lower melting temperature compared withVDC/BA copolymers, while that melting temperature of VDC/VC copolymer is higherthan that of VDC/acrylate copolymers with the same VDC content. The barrier propertyof the copolymers is predominantly controlled by crystallite, free volume fraction, andcohesive energy The permeability coefficients of VDC/MA copolymers to oxygen, carbondioxide, and water vapor were successfully correlated with the ratio of free volume tocohesive energy.
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| 收稿时间： | 1994-10-18 |
BARRIER PROPERTIES OF VINYLIDENE CHLORIDE COPOLYMERS |
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| LI Yuesheng,WENG Zhixue,HUANG Zhiming,PAN Zuren.BARRIER PROPERTIES OF VINYLIDENE CHLORIDE COPOLYMERS[J].Chinese Journal of Polymer Science,1996,0(2):105-110. |
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| Authors: | LI Yuesheng WENG Zhixue HUANG Zhiming PAN Zuren |
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| Institution: | Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 Inetitute of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 |
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| Abstract: | The permeability coefficients of a series of copolymers of vinylidene chloride (VDC)with methyl acrylate (MA), butyl acrylate (BA) or vinyl chloride (VC) (as comonomer)to oxygen and carbon dioxide have been measured at 1.0 MPa and 30℃, while those towater vapor have been measured at 30℃ and 100% relative humidity. All the copolymersare semicrystalline. VDC/MA copolymers have lower melting temperature compared with VDC/BA copolymers, while that melting temperature of VDC/VC copolymer is higherthan that of VDC/acrylate copolymers with thesame VDC content.The barrier property of the copolymers is predominantly controlled by crystallite,free volume fraction,and cohesive energy.The permeability coefficients of VDC/MA copolymers to oxygen,carbon dioxide,and water vapor were successfully correlated with the ratio of free volume to cohesive energy. |
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| Keywords: | VDC copolymers modified Barrier films Permeability |
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