Topic
Plastomer
About: Plastomer is a research topic. Over the lifetime, 388 publications have been published within this topic receiving 4160 citations.
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TL;DR: In this article, the optimum blending temperature, time and shear rate for EVA co-polymer was obtained for VG 10 at varying combination of the three parameters and a total of 80 combinations were obtained.
Abstract: Increase in traffic, new axle configurations and high temperature, demands the use of modified binders for resisting the stresses induced. The primary goal of modifier is to increase the stiffness at high temperature while maintaining its flexibility at lower temperatures. It tends to increase the effective visco-elastic response of the binder. Among different modifiers, polymers have been very promising in improving the properties of binder. Ethylene Vinyl Acetate (EVA) is a plastomer, obtained by co-polymerization of ethylene and vinyl acetate. Depending on the percentage of vinyl acetate, the properties of the co-polymer changes, low vinyl acetate showing similar behavior to that of low density polyethylene (LDPE). EVA is characterized by its melt flow index (MFI) and vinyl acetate content. Though a potential modifier, problems of phase separation have been encountered, attributable to the presence two separate phases of bitumen and polymer which are incompatible with each other. Apart from the properties of base binder and the amount of polymer, the blending temperature, time and shear rate play an important role in obtaining a homogenous mix. This paper focuses on obtaining the optimum blending temperature, time and shear rate for EVA co-polymer. VG 10 is modified with EVA at varying combination of the three parameters and a total of 80 combinations is being obtained. Storage stability and Fluorescence microscopy is used for characterizing the phase separation of the modified binder.
32 citations
TL;DR: In this article, the surfaces of white fillers such as Kornica chalk, precipitated calcium carbonate and KOG Kaolin were modified with a variety of proadhesive compounds in different amounts.
Abstract: Investigation into possible modifications of surfaces of white fillers such as Kornica chalk, precipitated calcium carbonate and KOG Kaolin. The surfaces of these fillers were modified with a variety of proadhesive compounds in different amounts. Optimum proadhesive compound was determined for each kind of filler. The modified fillers were tested in rubber mixtures based on butadiene-styrene rubber and in polyurethanes.
32 citations
TL;DR: In this paper, a hybrid TPE based on grafting of a functional butyl rubber to plastomer was explored, where the uniform comonomer insertion resulted in low-density plastomers exhibiting both plastic and elastomeric behavior.
Abstract: Plastomers are ethylene alpha-olefin copolymers made from the single site metallocene catalyst using a variety of polymerization processes. The key features are uniform intermolecular and intermolecular comonomer distribution, low extractables, comonomer dependent melting point, and low ash content. The uniform comonomer insertion resulted in low-density plastomer exhibiting both plastic and elastomeric behavior. The dual character plastomer evolved into a new class of impact modifiers for polypropylenes replacing the conventional ethylene-propylene copolymer (EPR) to produce both thermoplastic olefins (TPOs) and thermoplastic elastomers (TPEs). A hybrid TPE based on grafting of a functional butyl rubber to plastomer was explored. Low temperature impact and clarity can be achieved by matching the reflective index of a plastomer with a random polypropylene copolymer (RCP).
32 citations
Patent•
15 Oct 2002
TL;DR: In this paper, a polyolefin multilayer film containing a core layer and a first poly-olefinic skin layer of a blend, wherein the first polyole-fin skin layer does not contain a thermoplastic or natural rubber and provides a cold seal receptive surface for a cold-seal adhesive is disclosed.
Abstract: A polyolefin multilayer film containing a polyolefinic core layer and a first polyolefin skin layer of a blend, wherein the first polyolefin skin layer does not contain a thermoplastic or natural rubber and provides a cold seal receptive surface for a cold seal adhesive is disclosed. The blend includes an ethylene propylene random copolymer at 50-90 wt. % of the skin layer and metallocene catalyzed plastomer at 10-50% wt. % of the skin layer, a metallocene catalyzed isotactic polypropylene polymer or a butene propylene copolymer that contains from 5 wt % to 22 wt % of butene.
32 citations
Patent•
14 Dec 1981
TL;DR: In this paper, a fire resistant non-halogenated and flexible polymer composition comprises a polymer mixture with an inorganic filler, the filler is a metal hydroxide used in an amount of 180 to 320% of the polymer mixture.
Abstract: A fire resistant non-halogenated and flexible polymer composition comprises a polymer mixture with an inorganic filler. The polymer mixture comprises
- as an elastomer component, an ethylene-copolymer or mixed polymerisate with a comonomer portion of at least 38% consisting of unsaturated ester comonomers, the elastomer being present in an amount by weight of least 50% of the polymer mixture, - as a plastomer component an ethylene-copolymer with an ethylene portion of at least 70%, the plastomer component being present in an amount by weight of at most 50% of the polymer mixture. The filler is a metal hydroxide used in an amount of 180 to 320% of the polymer mixture. The composition is particularly useful as sheathing for a cable. An extruder for processing the composition is also described.
31 citations