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Flex‐resistant permeable PVC films
Author(s) -
Otterstedt JanErik A.
Publication year - 1977
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1977.070210723
Subject(s) - plasticizer , materials science , vinyl chloride , curing (chemistry) , microporous material , composite material , permeability (electromagnetism) , phthalate , polymer chemistry , chloride , chemical engineering , polymer , chemistry , membrane , copolymer , biochemistry , engineering , metallurgy
Microporous poly(vinyl chloride) films with flex resistance in excess of 400,000 flexes at 20°C and 65% R.H. and in excess of 30,000 flexes at −;15°C, and water vapor permeability in excess of 250 g/m 2 24 hr have been prepared from controlled expansion and curing of plastisols, which contain a poly(vinyl chloride) (PVC) resin with a K value of 75 or more and a plasticizer with a solubilizing power not greater than that of dioctyl phthalate. Controlled curing produces uniformity in the morphology of the cell walls while maintaining sufficiently high melt viscosity to retain the open structure of the porous material.