Investigation the physical and mechanical properties of treated poplar wood (Populus deltoides) by wild pistachio tree resin

In this study, theeffect of Bane tree resin on the physical and mechanical properties of poplarwood was investigated. Wood samples were saturated by vacuum-pressure andimmersion methods with concentrations of 1, 3, 6, 9, 12, and 15%. Physical andmechanical tests were done according to the related standards. The highestweight gain and retention of preservative material in vacuume-pressuretreatment were 18.52% and 71.78 kg m-3 respectively at 15%concentration. The results showed that the use of Bane resin reduced wateruptake and volumetric swelling of treated samples by 35 and 24.5% over 168 hrespectively in vacuum-pressure method. The compressive strength parallel to grain of the specimens treated withvacuum-pressure method did not change significantly. The hardness resistancesof the samples saturated by vacuum-pressure method were increased by increasingof concentration up to 3% and then by increasing the preservative materialconcentration from 3 to 15% were reduced. Infrared spectroscopy results did notshow any difference between the spectrums of Bane resin saturated sample andthe control sample. Any new peak was not observed in infrared spectroscopyspectrum that indicates the Bane resin has not changed the main structure ofthe cell wall.