Abstract
Interpenetrating polymer networks (IPNs) that have silane resins as one of their components are industrially important due to their physical and chemical properties. The current study included preparation and characterization of two types of unsaturated silane monomers in order to prepare new types of IPNs with unsaturated polyesters (palatal). These monomers were characterized with Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy (<SUP>1</SUP>H NMR), and their molecular weights were determined by cryoscopy technique. The curing properties of the silane monomers and the IPNs were observed by differential scanning calorimetry (DSC), and several of thermal curing functions were determined, such as the initial curing temperature, optimum curing temperature, curing energy, activation energy and rate of curing. There was a significant decrease in the initial and maximum curing temperatures compared with the unsaturated polyester resin (palatal) due to the decrease in the activation energy from 105.4 to 77.3 ºC when the allyoxy silane monomer percentage was shifted from 5 to 20%. Meanwhile, the activation energy for the IPNs based on α-methyl-butenoxy silane decreased from 96.8 to 55.8 kJ/mol.
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