Effect of side groups of polymer glycol on microphase-separated structure and mechanical properties of polyurethane elastomers

Ken Kojio, Sadaharu Nakamura, Mutsuhisa Furukawa

研究成果: ジャーナルへの寄稿記事

27 引用 (Scopus)

抄録

The effect of side methyl and dimethyl groups of the soft segment component on the microphase-separated structure and mechanical properties of Polyurethane elastomers (PUEs) was investigated. Poly(oxytetramethylene) glycol (PTMG), and PTMG incorporating dimethyl groups (PTG-X) and methyl side groups (PTG-L) were used as a polymer glycol, which forms a soft segment in the PUEs. The PUEs were synthesized with 4,4′-dipheylmethane diisocyanate [1, 1′- methylenebis(4-isocyanatobenzene)], 1,4-butane diol, and 1,1,1-trimethylol propane by a prepolymer method. The degree of microphase separation of the PUEs became weaker with increasing side group content in polymer glycols. Dynamic viscoelastic properties measurement showed reorganized-crystallization and melting of the soft segment for the PUEs based on PTMG, PTG-L, and PTG-X with a lower content of the side groups, but not for a PTG-L and PTG-X with higher content of the side groups. Tensile testing revealed that increasing methyl group concentration made the PUEs soften and weaken. The PTMG-based PUEs obviously exhibited strain-induced crystallization of the soft segment chains during elongation process. In contrast, for the PTG-L and PTG-X-based PUEs, crystallinity decreased with increasing side group content, and the PUEs with PTG-L and PTG-X with highest methyl group content did not crystallize even at a large strain.

元の言語英語
ページ(範囲)2054-2063
ページ数10
ジャーナルJournal of Polymer Science, Part B: Polymer Physics
46
発行部数19
DOI
出版物ステータス出版済み - 10 1 2008

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Elastomers
Glycols
Polyurethanes
elastomers
glycols
Polymers
mechanical properties
Mechanical properties
polymers
Crystallization
crystallization
prepolymers
diisocyanates
Microphase separation
Propane
Tensile testing
Butane
butanes
propane
elongation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

これを引用

Effect of side groups of polymer glycol on microphase-separated structure and mechanical properties of polyurethane elastomers. / Kojio, Ken; Nakamura, Sadaharu; Furukawa, Mutsuhisa.

:: Journal of Polymer Science, Part B: Polymer Physics, 巻 46, 番号 19, 01.10.2008, p. 2054-2063.

研究成果: ジャーナルへの寄稿記事

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abstract = "The effect of side methyl and dimethyl groups of the soft segment component on the microphase-separated structure and mechanical properties of Polyurethane elastomers (PUEs) was investigated. Poly(oxytetramethylene) glycol (PTMG), and PTMG incorporating dimethyl groups (PTG-X) and methyl side groups (PTG-L) were used as a polymer glycol, which forms a soft segment in the PUEs. The PUEs were synthesized with 4,4′-dipheylmethane diisocyanate [1, 1′- methylenebis(4-isocyanatobenzene)], 1,4-butane diol, and 1,1,1-trimethylol propane by a prepolymer method. The degree of microphase separation of the PUEs became weaker with increasing side group content in polymer glycols. Dynamic viscoelastic properties measurement showed reorganized-crystallization and melting of the soft segment for the PUEs based on PTMG, PTG-L, and PTG-X with a lower content of the side groups, but not for a PTG-L and PTG-X with higher content of the side groups. Tensile testing revealed that increasing methyl group concentration made the PUEs soften and weaken. The PTMG-based PUEs obviously exhibited strain-induced crystallization of the soft segment chains during elongation process. In contrast, for the PTG-L and PTG-X-based PUEs, crystallinity decreased with increasing side group content, and the PUEs with PTG-L and PTG-X with highest methyl group content did not crystallize even at a large strain.",
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