Plastomer

About: Plastomer is a research topic. Over the lifetime, 388 publications have been published within this topic receiving 4160 citations.

Effect of elastomeric and plastomeric tougheners on different properties of recycled polyethylene

Abstract: The effect of two elastomers and a newly developed plastomer on rheological, mechanical, and thermal properties of their blends with a commercially available recycled polyethylene were studied. The results show effective improvements in engineering properties of the recycled polyethylene (PE). Low percentages of these modifiers give rise to higher elastic properties of the blends. Addition of all modifiers resulted in decreases in crystallinity and in melting point of the blends. Depending on modifier type the intensity of the changes was different. It is concluded from infrared spectra of the blends that no chemical interaction occurs during melt mixing of the ingredients. These improvements are attributed to morphological changes and physical interactions between modifiers and PE matrix. In melt state, as the modification percentage increases and depending on the nature of modifier, the resulting blends show different rheological behavior: EPDM447 constantly increases the viscosity and elasticity of the corresponding blends; EPDM541 is almost ineffective; and EXACT™ 4041 decreases and then increases these properties, depending on its concentration in the blend. The results presented in terms of weighed relaxation time spectra show different behaviors depending on the additive. For all modifiers, the 7% modification was always found to have the most pronounced effect on almost all properties of the blends. It was also found that EPDM447 shows the best effects on different properties of the recycled PE. © 1998 John Wiley & Sons, Inc. Adv Polym Techn 17: 127–143, 1998

Thermoplastic, flexible mix of polymers

Abstract: 1. A thermoplastic, halogen-free, flame-resistant polymer mixture, particularly for cable sheathing having an elastomer component of ethylene copolymer or ethylene terpolymer with a proportion of at least 38 % od comonomer and a plastomer component containing at least 70 % of internal ethylene monomer, wherein, in relation to the weight of all the polymer components, the proportion of the elastomer component amounts to at least 15 % and the proportion of the plastomer component amounts to 40 % to 85 %, and having a mineral filling of from 180 % to 320 % of the weight of the polymer mixture, which filling contains at least one metallic hydroxide, and also having carboxyl groups, characterized in that the carboxyl groups are introduced in a form bonded on a polymer in such a manner that this polymer contains 0.5 % to 14 % by weight of COOH groups.

Elastomeric blend for air barriers

Abstract: The present invention provides a composition suitable for an air barrier such as an automotive tire innertube, innerliner, and aircraft tire innertube or innerliner, curing bladders, and other pneumatic devices. The composition comprises an elastomer comprising C4 to C7 isoolefin derived units; and a plastomer, wherein the plastomer is a copolymer of ethylene derived units and C3 to C10 α-olefin derived units, the plastomer having a density of less than 0.915 g/cm3. In a desirable embodiment, naphthenic and aromatic oils are substantially absent from the composition. In another embodiment, a polybutene processing oil is present. Further, in yet another embodiment, a secondary rubber is also present such as, for example, natural rubber or butyl rubber, or a butadiene-based rubber.

Thermoplastic olefin compositions and injection molded articles made thereof

Abstract: A thermoplastic polymer composition that exhibits substantially isotropic post injection molding shrinkage. The thermoplastic polymer composition includes a blend of highly crystalline polypropylene homopolymer, an ethylene-C4-8 α-olefin plastomer and talc having a D50 of about 2.0 µm or less. The thermoplastic polymer composition exhibits post injection molding shrinkage, low temperature impact strength and tensile strength that is similar to or better than relatively expensive engineering resins and blends. The thermoplastic polymer composition according to the invention is particularly useful for forming injection molded parts for motor vehicles.

Flame retardant crosslinkable compositions and articles

Abstract: Flame retardant crosslinkable polyolefin compositions useful for the production of films, sheets and membranes are provided. The compositions are comprised of ethylene-silane copolymer, plastomer, flame retardant filler and, optionally, silanol condensation catalyst.