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Polypropylene (PP) was blended with branched polyethylenimine (PEI) with the aim to prepare blends having C[O.sub.2] adsorption property. The C[O.sub.2] adsorption properties will be conferred due to the presence of variety of amine functionality in PEI. PEI contains primary, secondary as well as tertiary amine groups. Before testing C[O.sub.2] adsorption, PP-PEI blends were characterized using variety of techniques, for example, differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, scanning electron microscopy, and polarized light optical microscopy. In this work, we have studied in detail both compatibilized as well as noncompatibilized blends of PP and PEI. The compatibilization was achieved via addition of maleic anhydride grafted PP. Finally, all the compatibilized as well as noncompatibilized blends were studied for C[O.sub.2] adsorption. The compatibilized blends showed better thermal, mechanical as well as C[O.sub.2] adsorption properties as compared to the noncompatibilized blends., INTRODUCTION Polypropylene (PP) is one of the major commodity thermoplastic and is primarily manufactured using Ziegler-Natta and metallocene catalyst systems [1, 2]. PP is used in wide range of applications, [...]

Mineral fillers like talc and mica are commonly used in the plastic industry because of their tendency to alter the properties of thermoplastic materials. Polypropylene (PP)-talc (PTC), PP-mica (PMC), and PP-talc/mica hybrid composites (PHC) were prepared. Results indicated that filler particle size, type, and content greatly influence the mechanical and rheological properties of the composites. Shear viscosity decreased with the increase in shear rate. At 40°C, an increase of approximately 120% in storage modulus (E ′) was observed in PMC composites. C parameter increased, whereas reinforcing efficiency (r) decreased with the increase in filler loading. Percent elongation of each type of composites decreased with the increase in filler loading. Tensile modulus of PTC composite increased significantly by 103% (571 MPa) at 20% loading of talc, whereas for PHC and PMC composites, increase of 93% (543 MPa) and 81% (511 MPa) was observed. Flexural modulus also increased considerably by 88% (2413 MPa), 80% (2313 MPa), and 62% (2084 MPa) of PTC, PHC, and PMC composites at 20% filler loading. [ABSTRACT FROM AUTHOR]