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Sawdust based composites
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DOI：10.1002/pat.4965.png)
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Abstract
En 中文
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 degrees C. Hot pressing of one of the composites containing 3 wt% of one of the polymeric binders at 110 degrees C provides the impact viscosity = 12 kJ/m(2)while the pressing at 200 degrees C results in the value of that viscosity = 30 kJ/m(2). Another option is using 5 wt% of the same polymer at 110 degrees 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 degrees C but only 2.9% for the composite made at 170 degrees 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.
Keywords:
composite water absorption
phenylethoxysiloxane
polymeric binders
sawdust composites
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