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2002•Journal of Hunan UniversityRequires access

Comparative Study between Free Radical and Cationic UV Curable Coatings

Xun Tang

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Abstract

By comparative study between free radical and cationic UV curable coatings, the effect of temperature on cure speed and the influence of O 2 on cure speed and films properties have been investigated. The curing rate of both the free radical and cationic UV curable coatings are accelerated with the rise of temperature, and the former's cure speed is higher than the latter. The free radical curable film has strong shrink, so it's adhesive is poor. To the contrary, the cationic UV curable coatings have feeble shrink and good adhesive. The oxygen has an obvious inhibition to the free radical curable coatings,whereas it does not act to the cationic curable coatings. Furthermore the cationic curable coatings have a dark reaction, when the UV light has been removed ,the films will be still curing.

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What this paper is about

By comparative study between free radical and cationic UV curable coatings, the effect of temperature on cure speed and the influence of O 2 on cure speed and films properties have been investigated. The curing rate of both the free radical and cationic UV curable coatings are accelerated with the rise of temperature, and the former's cure speed is higher than the latter. The free radical curable film has strong shrink, so it's adhesive is poor. To the contrary, the cationic UV curable coatings have feeble shrink and good adhesive. The oxygen has an obvious inhibition to the free radical curable coatings,whereas it does not act to the cationic curable coatings. Furthermore the cationic curable coatings have a dark reaction, when the UV light has been removed ,the films will be still curing.

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Available abstract

By comparative study between free radical and cationic UV curable coatings, the effect of temperature on cure speed and the influence of O 2 on cure speed and films properties have been investigated. The curing rate of both the free radical and cationic UV curable coatings are accelerated with the rise of temperature, and the former's cure speed is higher than the latter. The free radical curable film has strong shrink, so it's adhesive is poor. To the contrary, the cationic UV curable coatings have feeble shrink and good adhesive. The oxygen has an obvious inhibition to the free radical curable coatings,whereas it does not act to the cationic curable coatings. Furthermore the cationic curable coatings have a dark reaction, when the UV light has been removed ,the films will be still curing.

Key concepts: Cationic polymerization, Adhesive, UV curing, Materials science, Curing (chemistry), Radical initiator, Composite material, Polymer chemistry

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