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Structure and viscoelastic properties of segmented polyurethane blends

✍ Scribed by Toshikazu Takigawa; Masaya Oodate; Kenji Urayama; Toshiro Masuda

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
489 KB
Volume
59
Category
Article
ISSN
0021-8995

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✦ Synopsis

Structure and viscoelastic properties of segmented polyurethanurea (SPU) blends were investigated. The glass transition temperature (T,) of poly(tetramethy1ene glycohol) (PTMG) in a soft-segment block of the component SPU increased with decreasing molecular weight of PTMG. The blend samples showed two T8 of PTMG in the temperature dispersions of the loss modulus (E") and loss tangent (tan 6). The value of E' in the leathery region for the blend specimens was strongly affected by the morphology. The blends were considered to have a morphology where PTMG differing in molecular weight was localized.

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