Title: SYNTHESIS, MECHANISMS AND KINETICS OF FORMATION OF BI-COMPONENT POLYURETHANES
Page Range: p.645-665
Author(s): Ketata N; Sanglar C; Waton H; Alamercery S; Delolme F; Paisse O; Raffin G; Grenier-Loustalot M F
File size: 357K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 12
Issue No: No. 8
Abstract
The polyaddition reactions of bi-component polyurethane systems are characterised in this work. In order to characterise the reactivities of different polyethers towards 4,4′-diphenylmethane-diisocyanate, the mechanisms and kinetics of formation of polyurethanes were modelled by using the p-tolylisocyanate. Two types of polyethers were used: polyethylene glycol and polypropylene glycol with variable macromolecular chains and structures. The results were obtained by using a variety of analytical techniques, (NMR, FTIR, HPLC/UV/MS, ESI/MS, DSC, and MALDI-TOF). This work illustrates the need to use several complementary techniques in order to understand the molten state reaction mechanisms and kinetics of these complex PU systems. 30 refs.