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Thermodynamic study of deformation of crosslinked ethylene–propylene copolymer

✍ Scribed by Romanov, A. ;Pollák, V.

Publisher
Wiley (John Wiley & Sons)
Year
1970
Tongue
English
Weight
188 KB
Volume
8
Category
Article
ISSN
0449-2978

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✦ Synopsis

Abstract

The thermodynamics of deformation of ethylene–propylene copolymer crosslinked by dicumyl peroxide with addition of sulfur or maleic anhydride has been studied. Both the entropic (f~S~) and energetic (f~U~) components have been studied at elongations α up to 65%. It was found that the course of f~U~/f, where f is equilibrium stress, in dependence on α agrees with the determined difference in both chemical and physical bonds.

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The article describes the mechanical properties of a propylene-ethylene block copolymer (Co-PP) used as a matrix with acrylic acid (AA) and strengthened with glass fiber. Isotactic polypropylene (i-PP) is also used as a matrix to compare with the results obtained from the Co-PP grafting. Experimenta