Reaserch of UV-curing acrylates

• Main Author: 王沛雯
• Other Authors: 何志松
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/03564945698761523459

碩士 === 東海大學 === 化學工程與材料工程學系 === 98 === The UV-A ultraviolet was applied to cure acrylate resins which are composed of different components and different compositions, respectively. The samples were completely cured at a fixed UV-exposure time of 20 minutes under a circulating nitrogen atmosphere during UV irradiating. When the photoinitiator content was fixed at 1 wt. % and the ratio between oligomers and monomers changed, the temperatures of maximum rate of degradation of the resins with 80MFA oligomer decreased with increasing oligomer percentage. No matter which oligomer is used, the coefficients of thermal expansion of the samples remain constant while the oligomer percentage increases. The glass transition temperatures of the samples with 3000A oligomer increase slightly with increasing oligomer percentage. When the photoinitiator content increased and the amounts of oligomers and monomers were fixed, the temperatures of maximum rate of degradation and the coefficients of thermal expansion of the resins didn’t change regardless of which oligomer is used. The glass transition temperatures of the samples with 3000A oligomer decrease slightly with increasing amount of photoinitiator. Except for the resins with 3000A oligomer, the average surface roughness of the other samples are about 0.3 ~ 0.8 nm, which are quite small, indicating a uniform coating.