Polypropylene/polyimide (PP/PI) blends were synthesized by reactive extrusion with the in situ polymerization of polyimide phase presence maleic anhydride grafted polypropylene (PP-g-MA) as a compatibilizer. Blends reactively processed twin-screw extruder at 200 °C, PI content varying from 10 to 40 wt%. Examination morphology scanning electron microscopy (SEM) depicted fine sub-micrometer dispe...

This work focuses on reactive extrusion to design polypropylene (PP) chains with long and short branching obtain non-linear behavior for the synthesis of low-density foams (<100 kg m?3) using a batch supercritical carbon dioxide (scCO2) foaming process. From maleic anhydride (MA) grafted PP (PP-g-MA), long-branched are performed [MA]/ [OH] reaction (with Sorbitol alcohol). On other hand, branch...

the influence of maleic anhydride-polypropylene (mapp) (0, 2, 3 and 5%) as a compatibilizer on the wettability of polypropylene/wood flour/glass fiber hybrid composites was studied by using the contact angle determination technique. sample slats with a cross section of 10×70 mm were made by a twin screw extruder. specimens were conditioned at room temperature and the angles between the water dr...

This work focused on the influence of processing conditions on the mechanical properties of polypropylene (PP) and PP/mesoporous silica-hydroxyapatite (PP/MCM-41-HA) hybrid nanocomposites. The mechanical properties of PP were enhanced by adding MCM-41-HA nanoparticles. Neat PP and hybrid nanocomposites based on PP, containing maleic anhydride-grafted polypropylene (PP-g-MA) and MCM-41-HA, were ...

tobacco is planted extensively in golestan province and high volume of its stem wastes remained without using and it is burned. as a useful purpose of these wastes and to reduce the environmental problems, in this the mechanical properties of polypropylene composites reinforced with tobacco stalk flour were studied. for this purpose, the tobacco stalk flour as the reinforcement, in three levels...

Maleic anhydride-modified polypropylene was compounded with commercially available surface-modified montmorillonite in a twin-screw extruder. Recompounding ensured the removal of visible tactoids from the extrudate but TEM and XRD techniques showed nonuniform dispersion of clay platelets. In this study, we investigated the mechanical and fracture properties of nanoclayfilled polypropylene. Emph...

In this work, the influence of three types of styrene maleic anhydride (SMA) oligomers on the adhesion of polystyrene wood plastic composites (WPC) was investigated. The composites were processed on a twin-screw co-rotating extruder below 200°C using 20 wt% of wood flour. The styrene maleic anhydride with different content of maleic anhydride groups, 30%, 25% and 20% (w/w) and levels of 1, 2 an...

in this research, old magazine (omg) recycled fiber and glass fiber (gf) were mixed at different levels of 10%, 20%, 30% and 40% (based on weight) with two levels of 50% and 60% polypropylene (pp) and then the produced composites evaluated compared to those from net polypropylene. on the basis of obtained results from normalization equations in different treatments done, two treatments has been...

The paper presents the results of a study dilatometric properties thermoplastic elastomer nanocomposites based on mixtures random polypropylene, nitrile butadiene rubber, compatibilizer - copolymer polypropylene with maleic anhydride. Nanosized bentonite particles were used as filler. concentration nanoparticles was varied in range 1.0-20 wt %. values free and occupied specific volumes determin...