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Effects of molecular weight on selected physical properties of polyaromatic ether‐ketones
Author(s) -
Ogawa Takeshi,
Marvel C. S.
Publication year - 1987
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.1987.070330513
Subject(s) - ether , polymer , materials science , biphenylene , ultimate tensile strength , viscosity , elongation , polymer chemistry , intrinsic viscosity , chemical engineering , composite material , chemistry , organic chemistry , phenylene , engineering
Polyaromatic ether‐ketones with various inherent viscosities were prepared and their thermal properties and stress–strain relationships were studied. It was found that the polymer should have an inherent viscosity greater than 0.8 in order to give flexible films, but there was no difference in thermal and stress–strain properties among polymers with viscosities greater than 0.8. Values of 110 MPa and 13% are considered to be the standard values of tensile strength and elongation, respectively, for these polyaromatic ether‐ketones. The crosslinking effects on these properties were also studied, using polymers containing 1 and 5 mol % of crosslinkable biphenylene units, but no significant changes in the properties due to crosslinking were observed.