過酸化物-ジビニルモノマー系によって鋼状化されたカーボンブラック・グラフトポリマーの電気的特性

概要

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The polymers containing furnace black grafted with n-butyl acrylate or acrylic acid were cured with a peroxide (di-t-butyl peroxide, cummene hydroperoxide of di-cumyl peroxide) and a divinyl monomer (ethylene dimethacrylate), and their degree of crosslinking was determined by the measurement of gel fraction. Di-cumyl peroxide-ethylene dimethacrylate system was found to show the highest crosslinking efficiency. Then, the resistors were made from the polymers with different degrees of crosslinking by coating the carbon black-graft polymers dispersed in acetone on porcelain plates and heating them at 150℃ for 5 hr., and their electric resistance were measured. The following results were obtained: (1) The volume resistivity was in the range 6〜8 Ωcm. (2) The temperature coefficient was nearly equal to zero, regardless of the degree of crosslinking. (3) The hysteresis of resistance against temperature was smaller than that of the resistors made from the polymers crosslinked with epoxy resin and it decreased with increasing crosslinking.
社団法人日本材料学会の論文
1976-10-15