Determining of Basic Science and Applied Science Properties of Paulownia.

In this research paulownia wood in particleboards , wood plastics composites , morphological , physical and Chemical properties were investigated. 1-Particleboard: paulownia wood in particleboards industry prepared at four different level of combination contents of 25,50,75,and 100 percent (Base of paulownia )and three level of press times of 4 , 5 and 6 minutes. Based on the DIN-68763 standard physical and mechanical properties including MOR, MOE, IB, and thickness swelling and water absorption (after 2 and 24 immersion in water) were tested. Based on the factorial experimental design at completely random test was analysis. The results showed that optimum condition of paulownia wood in particleboard including: press time (5 min.), paulownia wood content was optimum condition in up to 75% and had the better of particleboards properties. 2-Physical ,Chemical and Morphological Properties: Cross sectional disks were cut at breast height from three 6-year-old trees of paulownia wood grown in Chamestan research station in Mazandaran province. Ring width, wood density, and fiber dimension were measured for each rings from pith to the bark. Overall average disks, fiber length, fiber width, lumen diameter, and cell wall thickness were measured at 1020, 35.44, 26.49, and 4.47 micrometer respectively. Mean values for the oven dry and green density were 0.33 g/cm3 and 0.28 g/cm3. Chemical compositions of the wood consist of cellulose, lignin, extractives (in acetone soluble) and ash were measured at 52.58%, 24.64%, 3.39%, and 0.25% respectively. 3-wood plastics composites : This study investigated the effect of maleic anhydride polypropylene (MAPP) addition as a coupling agent at three levels and also the chemical tereatments type of palownia wood as a nonexteractive and verigin fibers on processing and mechanical properties of modified fiber/ polypropylene composites. The results indicate that the interfacial bond between reinforcing fiber and matrix show great influence on the mechanical properties of composites. Furthermore it has been demonstrated that the addition of coupling agent during processing significantly improves the mechanical properties of fiber/ polypropylene composites. The results of this investigation indicates that the highest the mechanical properties of composites are as followThe mechanical properties of the poplar fiber with 1.5 and 2.5 % MAPP is higher than without MAPP, which proves that the addition of functional group C=O acts as a good bonding agent.