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Effect of polyester zigzag structure on the phase segregation of polyester-based polyurethanes

✍ Scribed by K. S. Chen; T. L. Yu; Y. H. Tseng

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 192 KB
Volume: 37
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19990701)37:13<2095::aid-pola24>3.0.co;2-7

No coin nor oath required. For personal study only.

✦ Synopsis

Polyester-based polyurethanes were synthesized from 4,4Ј-methylenebis-(phenyl isocyanate) (MDI) with butanediol as a chain extender and low molecular weight polyester-diol as a soft segment. Two polyesters were used in the synthesis of polyurethanes. One of the polyesters was synthesized from adipic acid and 1,6-hexanediol, which had an even number of carbon atoms. The other polyester was synthesized from pimelic acid and 1,5-pentanediol, which had an odd number of carbon atoms. The effect of even carbon monomers and odd carbon monomers of polyester soft segments on the phase segregation of soft and hard segments was studied by DSC (differential scanning calorimetry) and FTIR (Fourier transform infrared spectroscopy).

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