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Synthesis and kinetic studies of UV-curable urethane-acrylates

✍ Scribed by K. H. Hsieh; C. H. Kuo; C. A. Dai; W. C. Chen; T. C. Peng; G. H. Ho

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
112 KB
Volume
91
Category
Article
ISSN
0021-8995

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✦ Synopsis

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: 3162–3166, 2004

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