Ahn, KD Chung, CM Kim, YH 2024-01-21T15:41:48Z 2024-01-21T15:41:48Z 2021-09-05 1999-03-21 0021-8995 https://pubs.kist.re.kr/handle/201004/142332 Two multimethacrylates having three methacrylate groups (BPA-SM) and four methacrylate groups (BPA-4M) have been prepared by reacting hydroxyl groups of 2,2-bis [4-(2&apos;-hydroxy-3&apos;-methacryloyloxypropoxy)phenyl] propane (Bis-GMA) with methacryloyl chloride. BPA-SM and BPA-4M have much lower viscosities than the starting Bis-GMA, because they have only one or no hydroxyl group. Photopolymerizations of the multifunctional methacrylates were conducted by exposure to visible light using camphorquinone and 2-(N,N-dimethylamino)ethyl methacrylate as a photoinitiating system. High conversions >50% resulted from photopolymerization of BPA-SM, whereas Bis-GMA showed lower conversions under the same condition, implying better mechanical properties for the composite resins made from BPA-3M. BPA-4M showed much lower conversions in the photopolymerization condition. Water sorption of the photocured composite of BPA-3M containing 50 wt % of inorganic fillers was found to be 0.15%, which is only one-tenth of the commercial Bis-GMA composite. (C) 1999 John Wiley & Sons, Inc. English JOHN WILEY & SONS INC REACTION BEHAVIOR COMPOSITES Synthesis and photopolymerization of multifunctional methacrylates derived from Bis-GMA for dental applications Article 10.1002/(SICI)1097-4628(19990321)71:12<2033::AID-APP13>3.0.CO;2-I 1 JOURNAL OF APPLIED POLYMER SCIENCE, v.71, no.12, pp.2033 - 2037 JOURNAL OF APPLIED POLYMER SCIENCE 71 12 2033 2037 scie scopus 000078242800013 2-s2.0-0033101945 Polymer Science Polymer Science Article REACTION BEHAVIOR COMPOSITES multifunctional methacrylates visible light curing photopolymerization water sorption dental restorative composite dental filling materials