ステアロイル基を結合したシスポリイソプレンの合成および結晶化挙動 [in Japanese] Synthesis and Characterization of cis-1, 4 Poliysoprene Esterified with Stearic Acid [in Japanese]
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Synthetic <i>cis</i>-1, 4 polyisoprene (IR) was esterified with Stearic acid selectively at 3, 4 units by hydroboration with 9-borabicycro[3.3.1]nonane (9-BBN) followed by esterification with stearoyl chloride. The hydroxylation suppressed the crystallization of IR. The esterification of hydroxylated IR with 0.53wt% stearoyl group resulted in an increase in the rate of crystallization at -25°C, but not with 0.34wt% stearoyl group. A similar stimulation effect was observed by mixing stearic acid of 0.53wt%. The effect of mixed stearic acid on the rate of crystallization of IR was dependent on the amount of mixed or linked stearic acid.
GOMU 72(10), 620-625, 1999-10-15
THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN