ABSTRACT*



The effects of Post-curing with Electron Beam Irradiation on the Mechanical Properties of room temperature cured Uusaturated Polyester and Vinyl Ester Resins


Sang-Won Park


Department of Polymer Science and Engineering,
Graduated School Chungnam National University
Daejon, Korea


(Supervised by Professor Jae-Hak Choi)



The unsaturated polyester resin(UPR) and vinyl ester resin(VER) were one of the most popular thermoset resins which have very strong mechanical properties and very easier workability in room temperature. So they were used in so many industrial fields(matrix of FRP materials, chemical plant, food industries, construction


* A dissertation submitted to the committee of Graduate School, Chungnam National University in a partial fulfillment of the requirements for the degree of Doctor of Philosophy in Polymer Engineering conferred in February 2019.
fields, etc.). Generally most of all UPR and VER were cured by room temperature curing process with promotors and catalysts. But always there was lack of curing in room temperature curing and it meant there was some amount of residual styrene monomer. So in case of UPR and VER, post-curing was essentially needed to reach their maximum physical properties. The room temperature-cured UPR and VER casting plates were post-cured by electron beam irradiation under various dose (10-200 kGy). The post-curing degree was checked by comparison of various mechanical properties with fully thermally post-cured UPR and VER. The results revealed that UPR and VER were successfully post-cured by electron beam irradiation. The mechanical properties were increased with an increasing absorbed dose. The mechanical properties of the UPR and VER post-cured by electron beam irradiation were reached specific demanded properties within very short period.