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

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3735-3743
Number of pages9
JournalPolymer Chemistry
Volume4
Issue number13
DOIs
Publication statusPublished - Jul 7 2013

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Polyurethanes
Biodegradation
Urea
Agglomeration
Lysine
Biodegradability
Mechanical properties
Diamines
Putrescine
Differential Scanning Calorimetry
Dynamic mechanical analysis
X ray scattering
Heating
lysine diisocyanate
Amino acids
Differential scanning calorimetry
Infrared spectroscopy
Spectrum Analysis
Monomers
X-Rays

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Biochemistry
  • Biomedical Engineering
  • Bioengineering

Cite this

Molecular design of environmentally benign segmented polyurethane(urea)s : Effect of the hard segment component on the molecular aggregation states and biodegradation behavior. / Oniki, Yoshihiko; Suzuki, Ken; Higaki, Yuji; Ishige, Ryohei; Ohta, Noboru; Takahara, Atsushi.

In: Polymer Chemistry, Vol. 4, No. 13, 07.07.2013, p. 3735-3743.

Research output: Contribution to journalArticle

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