橋かけ高分子の誘電分散

概要

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The dielectric behavior of crosslinked polymers containing 11-membered ring (β-relaxation) has been investigated in connection with the dynamic mechanical properties. Control of the mobility of the ring structure and its homologous involved in the cross linked polymers was attempted by modification of the substituents at the 1-or 1, 2-position of diallyl succinate, and the diallyl succinate monomers were derived from the succinic acid and its derivatives : succinic acid (designated as DASu), methyl succinic (DAMeSu) acid ; cis-1, 2-dicarboxylic acid of cryclopropane (30 C), cyclobutane (40 C) and cyclohexane (60 C) ; dihydrohymic acid and phthalic acid (HHAC and DAP). The results of the investigation are as follows : All the cross linked polymers exhibit β-relaxation as 20℃ when measured at 30 KHz, which is presumably associated with the local motion of side chains of the polymers. The energy of activation is ⊿H^≠=11-14 Kcal/mole, ⊿S^≠=10-20 cal/mole, 60 C shows an abomalous behavior presumably owing to the existence of cyclohexyl ring which flips between the chair-chair forms.
社団法人日本材料学会の論文
1971-05-15