POLYURETHANES FROM 4,4′-DIPHENYLMETHANE DIISOCYANATE AND POLY(OXYETHYLENE) GLYCOLS. I. PREPARATION AND GENERAL PROPERTIES

Linear polyurethanes (PU) from 4,4′-diphenylmethane diisocyanate and an equimolar quantity of poly(oxyethylene) glycol (PEG) of various molecular weight (106, 200, 400, 1000, 2000, and 4000) were obtained by polymerization using 4-methylpentanone-2 as solvent at 115 °C. Alternative reaction conditio...

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Bibliographic Details
Published in:Journal of macromolecular science. Part A, Pure and applied chemistry Pure and applied chemistry, 2001-06, Vol.38 (7), p.673-680
Main Authors: Vatalis, Argyris S., Kehayoglou, Aristides H.
Format: Article
Language:English
Subjects:
Applied sciences
Degree of polymerization
Exact sciences and technology
Linear polyurethanes of poly(oxyethylene) glycols and diphenylmethane diisocyanate
Organic polymers
Physicochemistry of polymers
Polycondensation
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:Linear polyurethanes (PU) from 4,4′-diphenylmethane diisocyanate and an equimolar quantity of poly(oxyethylene) glycol (PEG) of various molecular weight (106, 200, 400, 1000, 2000, and 4000) were obtained by polymerization using 4-methylpentanone-2 as solvent at 115 °C. Alternative reaction conditions and melt polymerization were also applied. Samples were characterized by elemental analysis, solubility, I.R. spectroscopy, DSC (T m , T g ), [n] and [Mbar] n (osmotic). The results are correlated with the molecular weight of PEG and discussed.
ISSN:1060-1325
1520-5738
DOI:10.1081/MA-100103872