4-Vinylbenzyl thymine (VBT), a synthetic monomer designed with the ability to photo-dimerize was copolymerized with a positively charged, water-soluble monomer, 4-vinylbenzyl trialkyl ammonium chloride (VBA), resulting in VBT/VBA copolymer. Due to the thymine moiety in VBT, the copolymer has the ability to photo-crosslink upon irradiation with short-wavelength ultraviolet light, and due to VBA, it is water-soluble. One of the main applications of the VBT/VBA copolymer is as a photoresist that can be used to manufacture semiconductors. In this study, first, the molecular weights for VBT/VBA copolymers with 1 to 4 ratios were determined via Gel Permeation Chromatography (GPC). Second, the photo-induced immobilization process of the VBT/VBA copolymer was monitored using both UV-Vis Spectrophotometry (UV-VIS) and GPC to determine the gel point of the copolymer at which optimal crosslinking is achieved.

Study of the photodimerization of 4-vinylbenzylthymine and 4-vinylbenzyl trialkyl ammonium chloride using UV-Vis spectrophotometry and gel permeation chromatography

249th National Meeting (2015)

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