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I. Yamaguchi, Yasumasa Takenaka, K. Osakada, Takakazu Yamamoto (1998)
Synthesis and thermal properties of poly(urethane)s containing soft and flexible chain as the diols partPolymer Bulletin, 41
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Two series of new optically active poly(amide-imide-ether-urethane)s (PAIEU)s based on polytetrahydrofuran (PTHF), of Mn=1000 as soft segment were synthesized. These copolymers were prepared via direct polycondensation reaction of an aromatic diacid based on L-leucine with preformed imide ring, 4,4’-methylene-bis-(4-phenylisocyanate) (MDI) and PTHF-1000. The effects of different reaction conditions and method of preparation (one-step vs. two-step method) on the physical properties of these new PAIEUs have been investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), wide angle X-ray scattering (WAXS), FTIR spectroscopy, and dynamic mechanical thermal analysis (DMTA). The effect of the introduction of bis(p-amido benzoic acid)-N-trimellitylimido-L-leucine (BPABTL) (1) into PU back-bone on their properties was also studied.
Polymer Bulletin – Springer Journals
Published: Aug 21, 2006
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