Plastomer

Abstract: Heat sealable compositions suitable for film and film structures comprise: (a) from 30 to 70 weight percent of a low melting polymer comprising an ethylene based copolymer having a density of from 0.88 g/cm3 to 0.915 g/cm3, a melt index of from 1.5 dg/min to 7.5 dg/min, a molecular weight distribution no greater than 3.5, and a composition distribution breath index greater than 70 percent; and, (b), being different from (a), from 70 to 30 weight percent of a propylene based polymer having from 88 mole percent to 100 mole percent propylene and from 12 mole percent to 0 mole percent of an alpha-olefin other than propylene.

Abstract: A novel high-performance magnetorheological material, named as magnetorheological plastomer (MRP), was developed by dispersing iron particles into a plastic polyurethane (PU) matrix. The dynamic properties (including storage modulus and loss factor) of the MRP material were systematically tested and the influences of the iron particle content and magnetic field were analyzed. It is found that the anisotropic MRP product with 80% iron particle weight fraction (A-MRP-80), shows a high dynamic property: the maximum magneto-induced storage modulus is 6.54 MPa; the relative MR effect reaches as high as 532%; the loss factor can be reduced to 0.03 by adjusting magnetic field. This kind of MRP shows a much higher magnetorheological performance than the previously reported magnetorhelogical elastomer (MRE). The mechanism for its high MR performance was proposed and the influence of the iron particle distribution and temperature on the dynamic properties were discussed.

Abstract: Compatibilized blends of polypropylene, linear low density polyethylene and a low molecular weight plastomer are disclosed. The blend preferably contains at least about 50 percent by weight of crystalline polypropylene, from about 10 to about 50 percent by weight of LLDPE dispersed in a matrix of the polypropylene, and a compatibilizing amount of an ethylene/alpha-olefin plastomer having a weight average molecular weight between about 5,000 to about 50,000, a density of less than about 0.90 g/cm3, and a melt index of at least about 50 dg/min. The blend is useful in the formation of melt spun and melt blown fibers. Also disclosed are spun bonded-melt blown-spun bonded fabrics made from the blends.

Abstract: Recent Advances in Interpenetrating Polymer Networks.- Adhesion between Polymers.- Principles and Technologies of Polymer Blending.- The Role of Interfacial Agents in Polymer Blends.- Morphology, Crystallization and Melting Behaviour of Thin Films of Isotactic Polypropylene Blended with Several Rubbers.- Properties of Poly(Ethylene Oxide) / Poly(Methylmethacrylate) Blends: Morphology, Crystallization and Melting Behaviour.- Suspension Model for Elastic Modulus of Two-Component Polymer Blends.- Compatibility of PVC-Polymethacrylate Systems.- Linear Polyethylene/Polypropylene/Ethylene-Propylene Copolymer Ternary Blends: I. Relationship Between Impact Properties and Morphology.- Linear Polyethylene/Polypropylene/Ethylene-Propylene Copolymer Ternary Blends: II. Relationship Between Mechanical Properties and Morphology.- Formation of EDA Complexes in Polymer Mixtures.- Electrical Properties of Polypropylyne-Polycarbonate Blends.- New Conductive Polymeric Composites.- Anisotropy of Electrical Conductivity in Films of Polycarbonate with CT Complex Obtained by Zone Solidification.- The Influence of Interfacial Grafting on the Properties of Elastomer - Plastomer Mixtures.- Synthesis and Characterization of Interfacial Agents to be used in Polyamide 6/Rubber Blends.- A Mechanical Study of Polyethylene-Glass Beads Adhesion.- The Structure and Tensile Properties of Cold Drawn Modified Chalk Filled Polypropylene.- Composite Membranes Containing Liquid Crystals - Some Thermal and Mechanical Properties.- Structure and Properties of Two-Component Membranes Made of Ionic/Nonionic Polymers with Gradient Content of an Ionic Component.- "Multicomponent" Segmented Polyester Systems Containing Mesogenic Residues.

Abstract: Modified binders exhibit complex rheological behaviour due to the interaction of the modifiers with the base binder and the manner in which they age during field applications. Quantification of the interaction and the ageing of such modified binders is currently a necessity. In this investigation, three modified binders (elastomer, plastomer, and crumb rubber) and the base bitumen were subjected to different ageing conditions and the evolution of the chemical functionalities during ageing were tracked using FTIR spectroscopy. Analysis of the spectra of modified binders immediately after the production process showed that while the elastomer modified binders exhibited physical interaction, the plastomer and crumb rubber modified binders exhibited physical and chemical interactions. During ageing, there was no subsequent evolution of the interactions and one could only see chemical functionalities related to oxidation. Analysis of the spectra showed that the carbonyl and sulphoxide exhibit identical trends ...