فهرست مطالب rahim mohebbi

This research was conducted with the aim of investigating the compatibilizer of methyl diphenyl diisocyanate and maleic anhydride polypropylene on the morphology and physical-mechanical properties of wood-plastic composite containing nanosilica and nanoclay, high density polyethylene, wood flour. For this purpose, 3% compatibilizer along with nano particles at 3 levels of 0%, 2%, 4% were mixed with an internal mixer and test samples were prepared using the injection molding method. Then, the physical and mechanical properties of the samples such as water absorption and thickness swelling, modulus and tensile and bending resistances and impact resistance were performed on the samples. The results showed that the increase of nano particles had a positive effect on the physical and mechanical properties except impact resistance and improved them. However, the presence of nano-silica has led to an increase in the water absorption of composites. Examining the FTIR spectra and XRD patterns, the distribution of nanoclay in the field of polymer is of interlayer type, and in nanosilica, there is the accumulation of nano particles and the increase in the dimensions of the crystals in the composite. The results of bending and tensile strength were confirmed by scanning electric microscope.

This study was aimed at determining the effective criteria for location selection of wood drying plants in Iran. For this purpose، after review and field visit of the industries، 35 key indicators were identified. These criteria were divided into five major groups as: materials، infrastructure، technical، economical and instructional indices. The priority rates of these criteria and sub-criteria were evaluated by AHP technique. The results indicated that among 35 effective sub-criteria in location selection of the plants، the sub-criteria of quality of raw materials (0. 152)، purchasing raw materials، land cost، profitability، reliability of supply، and sales had the highest priorities، which were rated as 0. 118، 0. 105، 0. 067، 0. 061 and 0. 057، respectively.