The effects of cross-linking agents on some properties of HEMA-based resins.
The use of 2-hydroxyethyl methacrylate (HEMA)-based polymer as a biocompatible material has been well-established. HEMA-based resins containing cross-linking agents have several potential clinical applications. It is hypothesized that the incorporation of cross-linking agent will improve the mechanical properties of HEMA-based polymers while reducing water absorption and solubility. The purpose of the work reported here was to test this hypothesis and to determine the most effective cross-linking agent. A relationship among flexural strength, modulus, water absorption and solubility, and concentration of cross-linking agent was demonstrated. Strength and modulus tend to increase as the cross-linking agent concentration is increased, up to about 50%, after which the values level out or begin to fall. Water absorption drops with increasing cross-linking agent over the whole range of concentrations. Solubility tends to show a small decrease initially (up to 40%), followed by a noticeable increase as cross-linking agent concentration is increased. The trends were similar for all cross-linking agents, although there were differences in the absolute values in all properties depending upon the type of cross-linking agent used.
Arima
T
T
Department of Prosthetic Dentistry, Hiroshima University, School of Dentistry, Japan.
Hamada
T
T
McCabe
J F
JF
D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry*; D000704:Analysis of Variance; D002072:Butylene Glycols / Q000737:chemistry; D003432:Cross-Linking Reagents / Q000737:chemistry*; D004548:Elasticity; D005026:Ethylene Glycols / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D018583:Pliability; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D012995:Solubility; D014867:Water
D000180:Acrylic Resins; D002072:Butylene Glycols; D003432:Cross-Linking Reagents; D005026:Ethylene Glycols; D008689:Methacrylates; D011109:Polymethacrylic Acids; D014867:Water; C022288:butanediol diacrylate; C020946:triethylene glycol dimethacrylate; C024546:diethylene glycol dimethacrylate polymer; D011092:Polyethylene Glycols; C005044:hydroxyethyl methacrylate; C004919:ethylene dimethacrylate; C090921:1,6-hexanediol dimethacrylate; C028643:trimethylolpropane trimethacrylate