Effect of adding rubber powder to poplar particles on composite properties.
The effect of adding rubber powder derived from waste tires to poplar wood particles on mechanical and water-resistant properties of particleboards was examined. Sixty panels were made with rubber contents of 0-40% at hot-pressing temperatures of 140-180 °C, methylene diphenyl diisocyanate resin contents of 2-6% and panel densities of 0.6 to 1 g cm(-3). Although the modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB) strength were reduced by adding rubber powder, the thickness swelling (TS) was reduced by 7.3-61% when 10-40% rubber powder was added. Four regression equations (rubber content, pressing temperature, resin content and target panel density as functions of MOR, MOE, IB and TS) were developed and a nonlinear programing model was derived with operation research theory to obtain the most desirable panel properties under some production constraints.
Northeast Forestry University, 26 Hexing Road, Harbin 150040, PR China.
Min
M
Xu
Jian
J
Li
D055119:Elastic Modulus; D008422:Materials Testing / Q000379:methods*; D017711:Nonlinear Dynamics; D032107:Populus / Q000737:chemistry*; D011208:Powders; D012044:Regression Analysis; D012117:Resins, Synthetic / Q000737:chemistry; D012408:Rubber / Q000737:chemistry*; D013696:Temperature; D014934:Wood / Q000737:chemistry*
D011208:Powders; D012117:Resins, Synthetic; D012408:Rubber