ABSTRACT
Novel composites on the basis of dry sawdust and different organic and inorganic binders have been obtained in the spatial molds. Phenylethoxysiloxane of two types (PhES-50 and PhES-80), polyethylene, colophony, wood glue and liquid glass were used as binders, concentrations of which varied in region 3–15 wt%. Spectroscopic investigations by method FTIR have shown a presence of some chemical bonds between components of the composites in result of reactions between active groups of the ingredients. These bonds may be the main reason of improving of physical mechanical and thermal properties of obtained composites and their water resistance. It is established that these properties in general depend on the concentration of the binders. It is shown that the maximal values of the noted parameters for the composites appearance at relatively low concentrations of binders. Especially in case of PhES-50 and PhES-80 improved properties of composites are reached already at their 3–5 wt%. With rather high values of these parameters are characterized the composites, containing polyethylene due to their good wet stability and composites containing 2 binders simultaneously. The experimental results show that at right selection of the used ingredients and their concentrations the materials with rather high exploitation properties may be obtained.
