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UV Pre-Treatment for Polycarbonate for Bonding LSR in a Multi-Component Injection Molding Process by C. U. Schlitt; M. Hartung; A. Rüppel; R.-U. Giesen; H.-P. Heim is a Materials Science article available to read on EtoBox.

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## UV Pre-Treatment for Polycarbonate for Bonding LSR in a Multi-Component Injection Molding Process In this study, the influence of UVC radiation and the influence of ozone on the surface energy of specimens made of polycarbonate were investigated. In an additional step, the peeling resistance of silicone flaps, which were overmolded, onto pre-treated PC plates of multicomponent specimens were analyzed. For this purpose, the samples were exposed to UVC radiation for different lengths of time, ranging from 5 s to 3 600 s. To further evaluate the influence of the ozone created by the UVC in the presence of oxygen, treatments were also performed in pure oxygen and nitrogen atmospheres. Contact angle measurements as well as analyses of the surface roughness were carried out to evaluate the effect of the treatment. Two phenomena were identified during the investigations. In room air and oxygen atmospheres, a short-term effect of UVC radiation was observed, which led to an increase in the surface energy, and, therefore, also to an increase in the wettability after an exposure time of only 10 s. In addition, a longterm effect was also found when tests were performed in a nitrogen atmosph

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Author

C. U. Schlitt; M. Hartung; A. Rüppel; R.-U. Giesen; H.-P. Heim

Publisher

Walter de Gruyter GmbH

Published

2019

Language

EN

Field

Materials Science (Physical Sciences)