Plasma polymerization of some silicon‐ and tin‐containing monomers

Abstract

Plasma polymerization of several selected saturated and unsaturated silicon‐ and tin‐containing monomers, such as vinyltriethoxysilane (VTES), 3‐aminopropyltriethoxysilane (APTS), hexamethyldisiloxane (HMDS), hexabutyldistannoxane (HBDS) and tetraethylstannane (TES), were examined in terms of the following selected plasma operational parameters: discharge time (t), flow rate of monomer (F) and power input (W). For the initial deposition rates (DR), the following empirical equation was proposed: DR = k ta Fb Wc, from which the experimental values of the kinetic power factors (a,b,c and k) were calculated. The value of k calculated for VTES was the highest, indicating the high activity of the monomer in plasma in contrast to HBDS, which was about two orders of magnitude smaller. A modified Arrehnius equation was employed in the form of yield of deposition (DR/F) versus the specific energy (W/F), which showed that silicon‐containing monomers are more active than their organotin analogues in the chosen plasma conditions. Plasma polymers of HMDS, TES and HBDS prepared at low conversions were highly crosslinked and their structures were similar to those of crosslinked poly(dialkylsiloxane) or poly(organostannoxane) while those of VTES and APTS were primarily linear.

A novel approach to interpenetrating networks of epoxy resin and polydimethylsiloxane

“…FTIR spectra shown in Figure 1 were for c‐silica (a) and m ‐silica (b). The feature at 914 cm −1 in trace b was assigned to epoxy groups; those at 2857 and 2926 cm −1 were because of CH stretching 24–28. This indicated that SSO based on GPMS was chemically bonded to silica.…”

“…For the spectrum of IPN, i.e., the system after curing, the bands at 1855, 1777, and 921 cm −1 disappeared and the bands at 3700–3320 cm −1 (OH) and 1738 cm −1 (COO) enhanced, indicating the reaction between DGEBA and the hardener. In addition, the bands at 2160 and 1414 cm −1 disappeared, which indicated the hydrosilylation between PDMS 6, 24–29…”

Synthesis and characterization of new hydrogels on the basis of water‐soluble maleic anhydride copolymers with γ‐aminopropyltriethoxysilane

“…Silane‐based coupling agents, most frequently γ‐aminopropyltriethoxysilane (APTS), were used to improve the surface adhesion in various polymer composites,6 to modify the surface of polypropylene7 and polyethylene films,8 and for the preparation of silica hybrid materials by in situ solvent (THF) gel process using a maleic anhydride (12 wt %) styrene random copolymer/tetraethoxysilane/APTS system 9. The interactions of MA–styrene or MA–α‐olefins alternating copolymers with APTS were studied by means of FTIR–ART spectroscopy 10.…”