Computation of durability of particle boards based on biobinders during thermal aging

摘要

The change in the strength of particle boards made using nontoxic-modified residual brewer's yeast as a biobinder during thermal aging was studied. It was shown that the strength of the particle boards increased during the first 24 h when the boards were exposed to temperatures of + 50 and + 80 degrees C, and then the strength decreased. Through the approximation of the experimental results for the changes in strength during thermal aging using polynomial and power functions, the aging period (durability) of the particle boards under accelerated testing conditions was determined. The calculated values for the activation energy of the thermal degradation processes and the values of the actual (equivalent) operating temperature of the pressed products were used to calculate the durability of the wood composites under operating conditions. It was found that the estimated durability of particle boards made with brewer's yeast as a biobinder was 11 months and slightly lower than that of particle boards made with toxic synthetic resins.