T. Sasuga et H. Kudoh, Ion irradiation effects on thermal and mechanical properties of poly(ether-ether-ketone) (PEEK), POLYMER, 41(1), 2000, pp. 185-194
The change in thermal properties induced by irradiation of 10 MeV H+, 20 Me
V He2+ and 2 MeV electron were studied for noncrystalline and crystalline p
oly(ether-ether-ketone) (PEEK), PEEK-a and PEEK-c, by differential scanning
calorimetry (DSC). It was revealed from the analysis of thermal parameter
changes that crosslinking proceeds by irradiation in all cases studied. The
comparison of effects between ion and electron irradiations led to a concl
usion that probability of crosslinking in the ion irradiation is extremely
large compared with that in the electron irradiation. It was clarified from
isothermal crystallization that ion gives more severe damage to crystallit
e than electron. The tensile properties for PEEK-a were varied in accord wi
th difference in thermal properties between ion and electron irradiations,
whereas for PEEK-e the difference in those between ion and electron irradia
tions was scarcely observed. (C) 1999 Published by Elsevier Science Ltd. Al
l rights reserved.