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The properties of polyurethanes with mixed chain extenders and mixed soft segments
Author(s) -
Ahn Tae Oan,
Jung SoonUk,
Jeong Han Mo,
Lee Sang Won
Publication year - 1994
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/app.1994.070510105
Subject(s) - differential scanning calorimetry , polymer chemistry , materials science , polyurethane , ether , copolymer , ultimate tensile strength , elastomer , chemical engineering , chemistry , polymer , composite material , organic chemistry , physics , engineering , thermodynamics
Series of polyurethaneurea elastomers were prepared from 4,4′‐diphenylmethane diisocyanate, poly(teuramethylene ether) glycol and poly(hexamethylene carbonate) glycol for mixed soft segments, and 1,4‐butanediol and isophoronediamine for mixed chain extenders. Characteristics of the copolymers related with compositions were examined. FT‐IR spectra showed that most of the urea carbonyl groups associated in hydrogen bonding, while urethane carbonyls only partially did so. Thermal and mechanical properties were investigated through differential scanning calorimetry and tensile testing. These thermal and mechanical properties are discussed from the viewpoint of microphase domain separation of hard and soft segments. © 1994 John Wiley & Sons, Inc.