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Morphology‐property relationship of segmented polyurethaneurea: Influences of soft‐segment structure and molecular weight
Author(s) -
Xiu Yuying,
Wang Dening,
Hu Chunpu,
Ying Shengkang,
Li Junxian
Publication year - 1993
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.1993.070480511
Subject(s) - morphology (biology) , adipate , polyester , materials science , copolymer , polymer chemistry , ethylene oxide , oxide , ultimate tensile strength , isocyanate , propylene oxide , phase (matter) , chemical engineering , composite material , chemistry , polyurethane , polymer , organic chemistry , genetics , metallurgy , engineering , biology
The relationships of the morphology and properties of a series of segmented polyurethaneurea (PUU) were studied in film form by using SEM and tensile stress‐strain data. The polyether‐based and polyester‐based PUU block copolymers were synthesized using poly(propylene oxide) ‐ethylene oxide polyether or poly(butylene adipate) polyester with different molecular weights, 4,4‐methylene bis(phenyl isocyanate), and diethyltoluene diamine. The extent of phase separation increased with increasing molecular weight of the soft segment. The polyether‐based PUU showed better phase separation than did polyesterbased PUU with the same molecular weight soft segment. The polyether‐ester‐based PUU showed the morphology of both polyether‐based and polyester‐based PUU but with larger domain size and interface. © 1993 John Wiley & Sons, Inc.