Molecular design of environmentally benign segmented polyurethane(urea)s: Effect of the hard segment component on the molecular aggregation states and biodegradation behavior

Yoshihiko Oniki, Ken Suzuki, Yuji Higaki, Ryohei Ishige, Noboru Ohta, Atsushi Takahara

研究成果: ジャーナルへの寄稿学術誌査読

16 被引用数 (Scopus)

抄録

We investigated the molecular aggregation states, mechanical properties, and biodegradability of environmentally benign segmented polyurethane(urea)s [SPU(U)s], which contained bio-based monomers of an α-amino acid lysine-based diisocyanate (LDI). The SPU(U)s consisted of an aliphatic diisocyanate (LDI or 1,4-butanediisocyanate (BDI)), a chain extender (1,4-butanediamine (BDA) or 1,4-butanediol (BDO)), and a poly-ε- caprolactone (PCL) segment. Four SPU(U)s, LDI-BDA, LDI-BDO, BDI-BDA, and BDI-BDO, were prepared by a standard two-step prepolymer method. Fourier transformed infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and small-angle X-ray scattering (SAXS) measurement indicated that the LDI-series SPU(U)s formed weakly aggregated hard segment domains, which readily dissociated under mechanical deformation and heating. The diamine chain extender, BDA, enhanced the stability of the hard segment domains, and the BDA-series SPU(U)s exhibited better mechanical properties than the BDO-series. The LDI-series SPU(U)s have notable biodegradability, and the BDI-based hard segments delayed the degradation rate because of the strongly segregated hard segment.

本文言語英語
ページ(範囲)3735-3743
ページ数9
ジャーナルPolymer Chemistry
4
13
DOI
出版ステータス出版済み - 7月 7 2013

!!!All Science Journal Classification (ASJC) codes

  • バイオエンジニアリング
  • 生化学
  • ポリマーおよびプラスチック
  • 有機化学

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