Premium
Structure and viscoelastic properties of segmented polyurethane blends
Author(s) -
Takigawa Toshikazu,
Oodate Masaya,
Urayama Kenji,
Masuda Toshiro
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960307)59:10<1563::aid-app9>3.0.co;2-k
Subject(s) - viscoelasticity , materials science , dissipation factor , morphology (biology) , glass transition , polyurethane , composite material , dynamic modulus , dynamic mechanical analysis , modulus , polymer blend , polymer chemistry , polymer , copolymer , dielectric , optoelectronics , biology , genetics
Structure and viscoelastic properties of segmented polyurethanurea (SPU) blends were investigated. The glass transition temperature ( T g ) of poly(tetramethylene glycohol) (PTMG) in a soft‐segment block of the component SPU increased with decreasing molecular weight of PTMG. The blend samples showed two T g s of PTMG in the temperature dispersions of the loss modulus ( E ″) and loss tangent (tan δ). The value of E ′ in the leathery region for the blend specimens was trongly affected by the morphology. The blends were considered to have a morphology where PTMG differing in molecular weight was localized. © 1996 John Wiley & Sons, Inc.