Citation:
LI Yuesheng, WENG Zhixue, HUANG Zhiming, PAN Zuren. BARRIER PROPERTIES OF VINYLIDENE CHLORIDE COPOLYMERS[J]. Chinese Journal of Polymer Science,
1996, 14(2): 105-110.
BARRIER PROPERTIES OF VINYLIDENE CHLORIDE COPOLYMERS
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 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.
English
BARRIER PROPERTIES OF VINYLIDENE CHLORIDE COPOLYMERS
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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