Abstract
This paper presents a factorial design (mixture design) used to analyze the hardness and degree of monomer conversion into composites containing conventional monomers and an organic-inorganic hybrid polymer-based methacryloyloxypropyl trimethoxysilane (MEMO). For this purpose, resins (composites with SiO
Highlights
Composites are materials prepared by mixing two or more components at macroscopic level and formed by distinct phases
The band relative to the symmetric stretching of the C-H bonds of the methoxy groups at 2840 cm–1 shown in plot (A) of methacryloyloxypropyl trimethoxysilane (MEMO) before its hydrolysis is not observed in spectrum (B), indicating that the hydrolysis process effectively converted the methoxy groups bound to silica into Si-OH with the release of methanol[12]
The signal associated with the nine hydrogens of the methoxy groups of alkoxysilane at d = 3.55 ppm is not observed in the spectrum of polycondensed (3-methacryloyloxypropyl)trimethoxysilane (pMEMO) (B)[14], indicating the effective reaction
Summary
Composites are materials prepared by mixing two or more components at macroscopic level and formed by distinct phases. Class II hybrid polymers are homogeneous materials that have an inorganic network covalently bonded to polymerizable carbon chains, which, under appropriate conditions, produce a polymer network in the hybrid system and form an Organically Modified Ceramic (ORMOCER )[1]. These materials can be prepared through a sol-gel process by using liquid precursors, leading to systems with chemical and mechanical performances that are higher than those of mixtures of organic matrixes and inorganic inclusions[2]. Studies have demonstrated that comparatively to dental restorative resins based on
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