Nghiên cứu khâu mạch quang hóa của hệ khâu mạch quang trên cơ sở nhựa epoxy biến tính dầu trẩu. Phần III.

Abstract

The photopolymerization of epoxy group in the 20 mm thick film of the system containing 5% triarylsulfonium salt (TAS) and epoxy resin modified by tung oil (ETT39), monome epoxy cyracure 6105 (BCDE) with different mass ratios ETT39/BCDE 10/90, 30/70, 50/50, 70/30 have been studied. The fastest rate of the reaction was observed in the system with the weight ratio ETT39/BCDE = 50/50 leading to epoxy conversion of the ETT39 and BCDE 82% and 98% respectively after 8.4 seconds exposure under 250 mW/cm² intensity UV-lamp. The influence of the film thickness studied in range from 10 mm to 50 mm showed the decrease of the photocrosslinking rate with the increase of the film thickness.