Properties Of Isotactic Polypropylene Research Articles

Adhesion in polyamide/compatibilizer/polypropylene systems

The effect of compatibilization on the adhesion, fracture toughness, morphology, and mechanical properties of isotactic polypropylene (PP)/polyamide 6 (PA) blends was investigated. Maleic anhydride (MAH) functionalized poly-(ethylene-co-vinyl acetate) (EVA-g-MAH) and nonreactive EVA copolymer were used as compatibilizers in binary blends. An attempt of in situ compatibilization via addition of pure maleic anhydride to PA/EVA/PP melt was also made. The blends containing maleated EVA copolymer showed more regular and finer dispersion of phases, better adhesion at the interface, and improved mechanical properties.

Influence of mechanical properties in carbon black (CB) filled isotactic polypropylene (iPP) and propylene-ethylene block copolymer

The mechanical properties of isotactic polypropylene (iPP) and propylene-ethylene block copolymer (Co-PP) with carbon black (CB) were added as a filler. By mixing appropriate amounts of the two components through melt-blending in a twin-screw extruder, the blended pellets were prepared to a series of test specimens by injection molding. A scanning electron microscopic study was performed of the morphologies of the impact fractured surfaces. The blending of CB in Co-PP not only improves the impact strength, but also improves the flexural modulus and tensile strength; however, the heat distortion temperature (HDT) of the Co-PP/CB blends decreased with greater filler content. Furthermore, the filler of CB improves the tensile yield strength only at low filler content in iPP/CB blends, and the heat distortion temperature (HDT) and flexural modulus of the iPP/CB blends increased with greater filler content. The impact behavior is not good for the iPP/CB blends. Overall, Co-PP/CB has better interaction of molecules than iPP/CB. © 1996 John Wiley & Sons, Inc.

Mechanism of the effect of a liquid medium on the mechanical properties of isotactic polypropylene

Mechanism of the effect of a liquid medium on the mechanical properties of isotactic polypropylene

Effect of liquids on type of failure and mechanical properties of isotactic polypropylene

Effect of liquids on type of failure and mechanical properties of isotactic polypropylene

Reversible change in the mechanical properties of isotactic polypropylene during large deformations and recovery

Reversible change in the mechanical properties of isotactic polypropylene during large deformations and recovery

Investigation of the thermophysical properties of polypropylene

The temperature and pressure dependence of the thermophysical properties of isotactic polypropylene has been investigated. The experimental results are presented and discussed.

Effect of concentration and phase condition of nuclei on the spherulite dimensions and the properties of isotactic polypropylene

Effect of concentration and phase condition of nuclei on the spherulite dimensions and the properties of isotactic polypropylene

The influence of the type of macromolecular structure on the sorption properties of isotactic polypropylene

The influence of the type of macromolecular structure on the sorption properties of isotactic polypropylene