Synthesis and kinetic studies of UV-curable urethane-acrylates
Journal
Journal of Applied Polymer Science
Journal Volume
91
Journal Issue
5
Pages
3162-3166
Date Issued
2004
Author(s)
Abstract
Abstract The UV?curable urethane?acrylates based on 2?hydroxyethyl methacrylate (HEMA)?terminated polyurethane (PU) for lithographic and coating applications are investigated in this study. Series of PU prepolymers were made from 4,4?diphenyl methane diisocyanate (MDI), poly(propylene oxide) glycol (PPG 400), poly(butylene adipate)glycol (PBA 500), or poly(tetramethylene oxide) glycol (PTMO 1000) and are terminated with HEMA. The 2,2?azobisisobutyronitrile (AIBN) was used as a UV?initiator under air atmosphere. The curing kinetics of HEMA?terminated PU film were studied. The curing analysis, using FTIR and reaction kinetics, indicate the reaction rate equation correlates well with the film thickness [ T ], initiator concentration [ I ], unreacted double bond concentration [C?C], and exposed energy [ E ] of the reaction system. The kinetic rate equation for the UV?curable reaction can be written as equation image ? 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 3162�V3166, 2004
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Type
journal article
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