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Morphology-property relationship of segmented polyurethaneurea: Influences of soft-segment structure and molecular weight

✍ Scribed by Yuying Xiu; Dening Wang; Chunpu Hu; Shengkang Ying; Junxian Li

Book ID
102737829
Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
697 KB
Volume
48
Category
Article
ISSN
0021-8995

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✦ Synopsis

The relationships of the morphology and properties of a series of segmented polyurethaneurea ( P U U ) 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.

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