Preparation, structure, growth mechanisms and properties of siloxane composites containing silica, titania or mixed silica–titania phases

Reinforcement of poly(dimethylsiloxane) by sol-gel in situ generated silica and titania particles

“…The scattering profiles of fractal objects are a power law of the type described by Equation (5): where I is the scattered intensity at wave vector q and the exponent P allows to distinguish between mass and surface fractals [9,10,19]. A slope of -4 in log-log axes, indicates that the system follows the Porod's law (P = D s -6), D s being the surface fractal dimension.…”

Dependence of silica particle sizes on network chain lengths, silica contents, and catalyst concentrations inin situ-reinforced polysiloxane elastomers

“…29,34,35 In brief, the scattering studies were performed in the Department of Materials Science and Engineering laboratories, using an Anton-Parr Compact Kratky camera that has a completely evacuated beam path. CuK ␣ line radiation ( ϭ 1.542 Å) was obtained from a Rigaku 12-kW rotating anode generator operated at various power settings, with a copper target and graphite monochromator.…”

Effect of filler amount on thermoelastic properties of poly(dimethylsiloxane) networks

“…where s is the stress, r is the density of dry chains, taken as 0.97 g/cm 3 , R is the gas constant, T the absolute temperature, taken as 300 K in the present work, M c is the molecular weight of chains between two cross-links, and a is the extension ratio. The affine network assumption is plausible due to strict constraints imposed on the chains from the rigid filler particles.…”

“…The reinforcement of PDMS elastomers by fillers has been the subject of numerous studies [2,3]. Earlier work on filled PDMS concentrated on the effects of fillers on macroscopic properties several examples to which are given in [4,5].…”