Abstract
In order to improve dental resin was synthesized EpDMA with different molecular lengths, which is alternatingly composed of rigid and water-resistant bisphenol A units and flexible alkoxide units in the main chain.Such molecular structure of EpDMA was considered to be suitable for improvement of dental resin.It was found that the longer the molecular length of EpDMA, the more favorable properties were endowed for dental use, though rather the softer it became;such properties as polymerization shrinkage, thermal expansion, water sorption, transverse strength, flexibility and abrasion resistance were improved as the molecular lengths of EpDMA increased.The copolymer of EpDMA and TEDMA was prepared at various comonomer rations.And it was found that such properties as polymerization shrinkage, thermal expansion, water sorption, transverse strength, elastic modulas and hardness were improved as the monomer ratio of EpDMA increased and that the abrasion resistance was the highest around 50mole% of EpDMA concentration.
