Influence of Side Group Contents of Polycarbonate Glycol on Aggregation Structures and Mechanical Properties of Polyurethane Elastomers

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  • 共重合ポリカーボネートグリコールの側鎖アルキル基含有率がポリウレタンエラストマーの凝集構造と力学物性へ及ぼす影響
  • キョウ ジュウゴウ ポリカーボネートグリコール ノ ソクサ アルキルキ ガンユウリツ ガ ポリウレタンエラストマー ノ ギョウシュウ コウゾウ ト リキガク ブッセイ エ オヨボス エイキョウ

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Abstract

Polycarbonate (PC) glycol synthesized from 1,6-hexanediol and 2-butyl-2-ethyl-1,3-propanediol (BEPD) with various ratios were employed to control the mechanical property of PC-glycol-based polyurethane elastomers (PUEs). The PUEs were synthesized from PC-glycol, 4,4’-diphenylmethane diisocyanate and 1,4-butanediol by a one-shot method. The degree of microphase separation became weaker with an increase in the BEPD content. This trend results in a decrease in Young’s modulus due to the lack of the formation of crystallized hard segment domains in the PUEs. Tensile strength and strain at break decreased and increased with increasing BEPD content, respectively. This result clearly suggests that butyl and ethyl groups of the BEPD part suppressed the packing of the soft segment under elongation.

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 85 (5), 151-156, 2012

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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