| Abstrakt: |
The composite samples were prepared by extrusion using atactic polypropylene and sawdust powder. Immersion solutions were made with potassium hydroxide (KOH) at 0.1 M in water (0.1 N). To make the composite samples as well as the pure polypropylene, different weight ratios of sawdust (10, 16, and 22 percent wt.) were added to polypropylene and the specimens extruded at 260 oC. The structural properties of pure and composite samples were studied using infrared spectroscopy (FTIR). (Shore D hardness, flexural strength, and impact strength) of composite samples were investigated. The FTIR results revealed that sawdust and polypropylene did not react chemically. The results of varying weights showed that the basic solution causes surface cracking and composite samples. Mechanical properties such as hardness and bending strength increase as the weight ratio of sawdust powder increases, as bending strength increases from 25 MPa to 73 MPa before immersion in KOH solution, but drops after immersion in base solution from (25 to 23) MPa, and it also increases with increasing the weight ratios of sawdust for the same previous ratios, whereas impact strength decreases as the weight ratio of filler increases after and before immersion in KOH solution, as it does with increasing the weight ratio before immersion in KOH solution, hardness increased from 15.3 to 26.5, and after immersion in KOH solution, it increased to 23.4. [ABSTRACT FROM AUTHOR] |
