Plastomer

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

Compatible polypropylene/poly(1-butene) blends and fibers made therefrom

Abstract: Compatible blends of polypropylene and poly(1-butene) are disclosed. The blend preferably contains from about 55 to about 90 percent by weight of crystalline polypropylene, from about 10 to about 45 percent by weight of poly(1-butene) dispersed in a matrix of the polypropylene, and an optional compatibilization enhancing amount of an ethylene/α-olefin plastomer having a weight average molecular weight between about 5,000 to about 50,000, a density from about 0.865 to 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.

Thermoplastic polymer composition and method of molding parts with reduced shrinkage

Abstract: A thermoplastic polymer composition incorporating at least about 50 wt.% polypropylene, at least about 20 wt.% of an elastomer such as EP rubber and at least about 4 wt.% plastomer. The plastomer is preferably a single site catalyzed ethylene based copolymer having a density less than about .915 g/cm3. By adjusting the amount of the plastomer in the composition, considerable control is secured over post-mold shrinkage of components produced through injection molding operations utilizing the composition. The composition can be prepared as a reactor blend or a melt blend. The composition is particularly useful in producing large components such as bumpers and exterior trim fascia for automobiles.

Microwave energy sensitizing concentrate

Abstract: A composition of matter suitable for sensitizing thermoplastic compositions to the heating effects of microwave energy in which the components of the composition are (1) an alcohol amine or derivative thereof; (2) a simple or polymeric alkylene glycol or derivative thereof; (3) silica; and (4) optionally, a plastomer that is a normally solid linear or radial teleblock copolymer derived from butadiene and styrene. A method for preparing this composition as a dry, free-flowing powder by preparing a liquid mixture of the polymeric alkylene glycol or derivative and the alcohol amine or derivative which mixture is then charged into a premixed combination of granulated plastomer, if used, and silica. A method for preparing flow molding compounds by admixing a non-polar thermoplastic with a sufficient amount of the sensitizer composition to provide microwave energy sensitivity. Subjecting the flow molding composition, in a mold, to microwave energy thereby producing a flow molded composition.

A Blown Film Comparison Between Conventional Lldpe and Pop Polymers

Abstract: The introduction of a new family of substantially linear poly olefin copolymers made using the Insite* technology process and marketed under the Affinity* Polyolefin Plastomer (POP) tradename offers polymers with different structure-fabrication-property relationships compared to conven tional linear low density polyethylene (LLDPE) polymers. The objective of this paper is to compare the blown fabrication characteristics of a constrained ge ometry catalyst technology (CGCT) polymer to a conventional LLDPE polymer with the similar melt index and density.

Blends of isotactic polypropylenes and a plastomer: Crystallization and viscoelastic behavior

Abstract: Blends covering the entire range of compositions of a metallocenic ethylene-1-octene, CEO, copolymer and two conventional isotactic polypropylenes, iPP, of different molecular weights have been prepared, analyzing the effect of composition and molecular weight on the crystallization (studied by DSC and X-ray diffraction) and viscoelastic behavior (DMTA). It was found that those blends rich in the iPP component show a behavior practically coincident with the weighted addition of the two components. On the contrary, significant deviations were found for the blends where the CEO copolymer is the major component. These deviations are considerably more important in the case of the blends with the iPP of higher molecular weight. Moreover, both components are not miscible, exhibiting the glass transitions of the two neat components The area under the loss tangent curves provides a preliminary information about how the toughness is enhanced using this type of impact modifier, though it provokes a significant reduction of stiffness.