Relationship between conformation and molecular motion of soft segment in polyurethane elastomers under elongation

Ken Kojio, Suguru Motokucho, Mutsuhisa Fumkawa

研究成果: 会議への寄与タイプ論文

抄録

In this study, the molecular aggregation state and molecular motion of the poly(oxypropylene) glycol (PPG), 1,4-butane diol and 4,4'-diphenylmethane diisocyanate (MDI) based polyurethane elastomers were investigated using dynamic viscoelastic measurement under elongation. Two PPGs with different molecular weight (Mn=2000 and 4000) were employed for the preparation of the PUEs. The peaks assigned to a relaxation of the PPG were clearly observed in the loss tangent (tan δ) curves at various strains. The onset temperature of these peaks decreased with an increasing strain. This result indicates that the size of corporate motion of glass transition decreased due to the orientation of the soft segment chains with an increasing strain. Also, the amount of temperature shift of 2000 molecular weight PPG-based PUEs were larger than that for 4000 one. This is correlated to the phase separation state of the PUEs.

元の言語英語
ページ3377-3378
ページ数2
出版物ステータス出版済み - 12 1 2005
イベント54th SPSJ Symposium on Macromolecules - Yamagata, 日本
継続期間: 9 20 20059 22 2005

その他

その他54th SPSJ Symposium on Macromolecules
日本
Yamagata
期間9/20/059/22/05

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Glycols
Elastomers
Polyurethanes
Conformations
Elongation
Molecular weight
Butane
Phase separation
Glass transition
Agglomeration
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Kojio, K., Motokucho, S., & Fumkawa, M. (2005). Relationship between conformation and molecular motion of soft segment in polyurethane elastomers under elongation. 3377-3378. 論文発表場所 54th SPSJ Symposium on Macromolecules, Yamagata, 日本.

Relationship between conformation and molecular motion of soft segment in polyurethane elastomers under elongation. / Kojio, Ken; Motokucho, Suguru; Fumkawa, Mutsuhisa.

2005. 3377-3378 論文発表場所 54th SPSJ Symposium on Macromolecules, Yamagata, 日本.

研究成果: 会議への寄与タイプ論文

Kojio, K, Motokucho, S & Fumkawa, M 2005, 'Relationship between conformation and molecular motion of soft segment in polyurethane elastomers under elongation' 論文発表場所 54th SPSJ Symposium on Macromolecules, Yamagata, 日本, 9/20/05 - 9/22/05, pp. 3377-3378.
Kojio K, Motokucho S, Fumkawa M. Relationship between conformation and molecular motion of soft segment in polyurethane elastomers under elongation. 2005. 論文発表場所 54th SPSJ Symposium on Macromolecules, Yamagata, 日本.
Kojio, Ken ; Motokucho, Suguru ; Fumkawa, Mutsuhisa. / Relationship between conformation and molecular motion of soft segment in polyurethane elastomers under elongation. 論文発表場所 54th SPSJ Symposium on Macromolecules, Yamagata, 日本.2 p.
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