Much sawdust is treated as waste and deposited in landfills; with time, the city landfills have to be made larger and larger and/or deeper and deeper. We have created composites on the basis of dry sawdust and only 3 wt% to 15 wt% of phenylethoxysiloxane binders of two kinds under pressures up to 15 MPa and temperatures up to 220 C. Hot pressing of one of the composites containing 3 wt% of one of the polymeric binders at 110 C provides the impact viscosity = 12 kJ/m 2 while the pressing at 200 C results in the value of that viscosity = 30 kJ/m 2. Another option is using 5 wt% of the same polymer at 110 C what gives the impact viscosity = 20 kJ/m 2. Water absorption after 24 hours exposition in water for 15 wt% of the same polymer amounts to 55.5 wt% when the composite is prepared at 130 C but only 2.9% for the composite made at 170 C. Given low-to-negligible prices of sawdust, composites with useful properties and low prices can be made from it-along with mitigation of waste creation.

Summary: Hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane with allyl glycidyl ether at 1:4.1 molar ratios of initial compounds in the presence of platinum hydrochloric acid (0.1 M solution in THF), Karstedt's catalyst (Pt 2 [(VinSiMe 2 ) 2 O] 3 ) and platinum on the carbon have been studied and 2.4.6.8-tetrapropyl glycidyl-2.4.6.8-tetramethylcyclotetrasiloxane has been obtained. For hydrosilylation reaction order, rate constants and activation energy have been determined in the presence of Karstedt's catalyst. Ring-opening polymerization reaction of D 4 R in the presence of catalytic amount of powder-like potassium hydroxide has been carried out. Linear methylsiloxane oligomer with regular arrangement of propyl glycidyl groups in the side chain has been obtained. The reaction of epoxy group containing compounds with primary and secondary amines has been carried out and corresponding amino hydroxyl groups containing compounds have been obtained. The synthesized organosiloxanes were studied by FTIR, 1 H, 13C and 29 Si NMR spectroscopies. Comb-type oligomers were characterized by sizeexclusion chromatography, wide-angle X-ray methods. Via sol-gel processes of 2.4.6.8-tetrapropyl glycidyl-2.4.6.8-tetramethylcycltetrasiloxane, ethylene diamine and tetraethoxysilane doped with lithium trifluoromethylsulfonate (triflate) or lithium bis(trifluoromethylsulfonyl)imide solid polymer electrolyte membranes have been obtained. The dependence of ionic conductivity as a function of temperature and salt concentration has been studied. It is shown that the conductivity of membrane containing 15 wt % of triflate type salt concentration is higher on the 3 orders than analogous containing the same amount of the salt lithium bis(trifluoromethylsulfonyl)imide. The difference is described in terms of ion mobilities in the polymer matrix.

We have obtained composites on the basis of dry bamboo powders and in turn several binders, including polyethylene (PE) and alkoxysilanes. The composites were studied by Fourier transformation infrared spectroscopy (FTIR), optical and scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Some mechanical properties were determined along with thermal stability by thermogravimetry; water absorption was also determined. FTIR results show formation of primary chemical bonds between bamboo surface active groups and the binders. Mechanical property improvement goes symbatically with the thermal stability.

Hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane (D4H) with allyl acetoacetate at 1:4.1 molar ratios of initial compounds in the presence of platinum hydrochloric acid (0.1 M solution in THF), Karstedt’s catalyst (Pt2[(VinSiMe2)2O]3) and platinum on the carbon have been carried out and D4R type compounds obtained. Reaction order, rate constants and activation energies for hydrosilylation reactions in the presence of Karstedt’s catalyst have been determined. Ring-opening polymerization reaction of D4R in the presence of catalytic amounts of powder-like potassium hydroxide has been carried out. A linear methylsiloxane oligomer with regular arrangement of propyl acetoacetate groups in the side chain has been obtained. The synthesized methylorganocyclotetrasiloxane and oligomers were studied by FTIR, 1H, 13C and 29Si NMR spectroscopy. Comb-type oligomers were characterized by gel-permeation chromatography, wide-angle X-ray diffractometry and differential scanning calorimetry. Solid oligomer electrolyte membranes have been obtained via sol–gel processes involving lithium trifluoromethylsulfonate (triflate) or lithium bis(trifluoromethylsulfonyl)imide. The specific volumetric electrical conductivity of the membranes at room temperature covers a wide range, from 10−10 to 10−4 S · cm−1, and depends on the structures of grafted anion receptors and the polymer backbones. Higher values of the specific conductivity are seen for the membranes containing triflate.

Hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane with allyl acetoacetate and vinyltriethoxysilane at 1:3:1 ratio of initial compounds in the presence of Karstedt's catalyst (Pt 2 [(VinSiMe 2 ) 2 O] 3 ), platinum hydrochloric acid (0.1 M solution in THF) and platinum on the carbon have been studied and D 4 R,R' type methylorganocyclotetrasiloxane has been obtained. Ring-opening co-polymerization reactions of methylorganocyclotetrasiloxane and hexamethyldisiloxane, in the presence of catalytic amount of powder-like potassium hydroxide, have been carried out and linear methylsiloxane oligomer with regular arrangement of propyl acetoacetate and triethoxysilane groups in the side chain has been obtained. The synthesized methylorganocyclotetrasiloxane and oligomers were studied by FTIR, 1 H, 13 C, 29 Si NMR spectroscopy. Comb-type oligomers were characterized by gel-permeation chromatography, wide-angle X-ray and differential scanning calorimetric methods. Via sol-gel processes of doped with lithium trifluoromethylsulfonate (triflate) or lithium bis-(trifluoromethylsulfonyl)imide oligomer systems solid polymer electrolyte membranes have been obtained. The dependence of ionic conductivity as a function of temperature and salt concentration has been studied. The electrical conductivity of these materials at room temperature belongs to the range of 7x10 -8 to 4x10 -6 S cm -1 and depends on the structures of grafted anion receptors and the polymer backbones.