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Thermal and mechanical properties of poly(ether urethane) modified by copolyamide segments
Author(s) -
Ahn Tae Oan,
Choi Il Seok,
Lee Sang Won,
Jeong Han Mo
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021950723
Subject(s) - crystallinity , materials science , polymer chemistry , ether , thermoplastic elastomer , oligomer , copolymer , thermoplastic , chemical engineering , composite material , polymer , chemistry , organic chemistry , engineering
Thermoplastic polyurethane elastomers (TPUs) from diol‐terminated poly(tetramethylene glycol) (PTMG), 1,4‐butanediol (BD), and 4,4′‐methylenediphenyl diisocyanate (MDI) were modified by copolymerizing diamine‐terminated nylon‐6/6,6 copolyamide oligomer. In TPUs modified by the copolyamide segment, the hard segment showed decreased crystallinity and melting point depression as the content of copolyamide segment was increased, which is probably due to mixing and strong interaction between copolyamide and hard segments. As some of the hard segments were replaced by copolyamide segments, the crystallinity of PTMG segments increased. This suggests that the copolyamide‐PTMG segment interaction is weaker than the interaction between hard and PTMG segments. Tensile properties of TPUs are discussed based on the thermal properties.