Citation: LI Tuesheng, WENG Zhixue, PAN Zuren. BARRIER PROPERTIES OF VINYLIDENE CHLORIDE/METHYL ACRYLATE COPOLYMER*[J]. Chinese Journal of Polymer Science, ;1997, 15(4): 319-324. shu

BARRIER PROPERTIES OF VINYLIDENE CHLORIDE/METHYL ACRYLATE COPOLYMER*

Received Date: 8 July 1996

A series of vinylidene dichloride (VDC) copolymers with methyl acrylate (MA) ascomonomer (3--12wt%), was prepared by free-radical suspension copolymerization. Thepermeability coefficients of the copolymers to oxygen and carbon dioxide were measured at1.0 MPa and at 30℃, and those to water vapor were measured at 30℃ and 100% relativehumidity All the VDC/MA copolymers studied are semicrystalline. As the MA contentincreases, the permeability coefficients of the copolymers to oxygen, carbon dioxide, and water vapor are progressively increased,caused by decrease in crystalline fraction and increase in free volume of VDC/MA copolymers.
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