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Study on Synthesis and Performance of the Composite Resin for Dental Materials

Author: WangJing
Tutor: WangZhongHui
School: Wuhan University of Technology
Course: Materials Science
Keywords: low-viscosity PMMA Epoxy Resin Composite Particles Semi-IPN complex
CLC: R318.08
Type: Master's thesis
Year: 2009
Downloads: 65
Quote: 0
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Abstract


Epoxy resin is one of the most common used polymer materials because its excellent overall performance. But it brings some inconvenience to the RTM, casting, injection process because epoxy resin system is viscosity. In this paper we prepared two kinds of low-viscosity epoxy curing agent (XCT-802、XCT-804) through the modification of ordinary epoxy resin curing agent.And several low-viscosity epoxy resin system was prepared. The viscosity of the epoxy resin curing agent was tested. The physical mechanical properties and hardness were studied. The optimum amount of the curing agent was obtained. The results showed that the resin system had low viscosity, good mechanical properties and high hardness.It is suitable for liquid molding process.Thermoplastic Polymethylmethacrylate(PMMA) is a commonly used material of manufacturing clinical artificial teeth. It is still widely used clinically due to the advantages of easy processing, better mechanical properties, and similar color to gingivas etc.In this paper, PMMA/epoxy semi-IPN complex was prepared by appropriate ratio and conditions.Three different IPN structure complexes were obtained by using three different initiators.The mechanical properties of the PMMA/epoxy composites were improved by adjusting the type of the initiator and the type and the amount of the epoxy resin curing agent.The effect of different proportions of the amount of epoxy resin and PMMA on the mechanical properties of the composites was discussed.And the complex was characterized by SEM, Pakistan hardness analysis and impact strength analysis.Composite particles/PMMA/epoxy semi-IPN complex was prepared by appropriate ratio and conditions.Two different IPN structure complexes were obtained by using two different curing agents. The mechanical properties of the PMMA/epoxy composites were improved by adjusting the type of the initiator and the type and the amount of the curing agent.The effect of different proportions of the amount of composite particles on the Pakistan-hardness of the composites was discussed.And the complex was characterized by SEM, Pakistan-hardness analysis and impact strength analysis.Two kinds of low-viscosity epoxy curing agents XCT-802、XCT-804、PMMA/epoxy semi-IPN complex and hydrophobic composite particles/PMMA/epoxy semi-IPN structure complex were synthesized. The synthetic mechanism is studied, and structural characteristics are also analyzed by SEM and Pakistan-hardness analysis in this paper, which showed that the two complexes have excellent mechanical properties and can be used as dental filling materials.

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CLC: > Medicine, health > Basic Medical > Medical science in general > Biomedical Engineering > General issues > Biomaterial
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