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Thermal and mechanical properties of thermoplastic polyurethane elastomers from different polymerization methods
Author(s) -
Ahn Tae Oan,
Choi Ii Seok,
Jeong Han Mo,
Cho Kilwon
Publication year - 1993
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990310404
Subject(s) - materials science , prepolymer , thermoplastic elastomer , elastomer , ultimate tensile strength , composite material , oligomer , polymerization , thermoplastic polyurethane , polyurethane , polymer chemistry , thermoplastic , polymer , copolymer
Abstract Thermoplastic polyurethane elastomers (TPUs) based on 4,4′‐methylene‐diphenyl diisocyanate, poly(tetramethylene glycol), diamine‐terminated aliphatic nylon oligomer, and 1,4‐butanediol were synthesized by two different polymerization methods, i.e. one shot and prepolymer methods. The effects of the polymerization method on the thermal and mechanical properties of the TPUs have been studied. A broader distribution of hard segment lengths in TPUs prepared by the one shot method was observed from thermal and tensile property measurements, compared with those prepared by the prepolymer method. TPUs by the one shot method showed a higher T m of the hard segments and better tensile properties when soft‐hard segment interaction was relatively small. However, inferior tensile properties were observed when the soft‐hard segment interaction was high; typically when nylon oligomer was used as a soft segment.