Showing papers on "Plastomer published in 2011"
TL;DR: In this article, a magnetorheological plastomer (MRP) was developed by dispersing iron particles into a plastic polyurethane (PU) matrix, and the dynamic properties of the MRP material were systematically tested and the influences of the iron particle content and magnetic field were analyzed.
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.
144 citations
TL;DR: In this paper, the effects of ultrasound on the morphology, as well as the rheological and mechanical properties of the composites, were studied in a specially designed ultrasound-assisted extrusion system that was developed in our laboratory.
Abstract: Propylene-based plastomer/nanosilica composites, with a filler content of 1–4 wt%, were prepared by a specially designed ultrasound-assisted extrusion system that was developed in our laboratory. The effects of ultrasound on the morphology, as well as the rheological and mechanical properties of the composites, were studied in this paper. In spite of slight ultrasound-induced degradation of the polymeric matrix, the results showed that the strength and elongation of the composites at break, in most cases, still improve in the presence of ultrasound because of ultrasound-induced homogeneous dispersion of nanoparticles in the polymeric matrix (as confirmed by scanning electron microscope, transmission electron microscope and differential scanning calorimetry studies). Dynamic rheological measurements also indicate that ultrasound-induced compatibilization has a more predominant role than does degradation. From dynamic mechanical measurements, it was found that ultrasound-induced degradation results in a drop in the dynamic storage modulus and glass transition temperature for composites with 4 wt% filler content, whereas ultrasound-induced compatibilization enhances their loss factor values. By the presence of 100 W ultrasound during extrusion, SiO2 nanoparticles become smaller and their aggregations disappear, indicating that more homogeneous dispersion of SiO2 nanoparticles into propylene-based copolymer matrix is achieved.
28 citations
01 Dec 2011
TL;DR: A review of different polymers such as styrene-butadiene-styrene (SBS), styrene butadiene rubber (SBR), SBR, EVA and poly phosphoric acid (PPA) with emphasis on SBS and its microstructure is presented in this paper.
Abstract: The rheological properties of bitumen are improved by addition of small quantities of polymers. A review of different polymers such as styrene-butadiene-styrene (SBS), styrene-butadiene-rubber (SBR), ethylene vinyl acetate (EVA) and poly phosphoric acid (PPA) with emphasis on SBS and its microstructure is presented in this paper. The polymers are divided into two groups: elastomers and plastomers. SBS, an elastomer, has shown greater potential compared to other modifiers when blended with bitumen and improves the mechanical properties and rheological behavior of conventional bitumen. SBS is made up of styrene and butadiene monomer units. It was found that maltene interacts preferentially with the polybutadiene unit of SBS, whereas asphaltene interacts predominantly with the polystyrene unit. SBR is another elastomer which also has polystyrene and polybutadiene units with a different structural make up. EVA is a plastomer which when blended with bitumen has improved the rheological properties and stability, provided the asphalt has asphaltene content below a critical level. PPA is a liquid mineral polymer. Addition of PPA to asphalt contributes to more interactions within the asphaltenes network, thus increasing the elastic behavior. A study was also conducted to determine the influence of asphaltenes and maltenes on the rheological properties of polymer modified binders.
12 citations
Patent•
20 Jul 2011
TL;DR: In this article, a multilayer heat shrinkable film, comprising a heat-sealing layer in contact with a packaged product, an outer layer and an intermediate layer, was provided.
Abstract: The invention provides a multilayer heat shrinkable film, comprising a heat-sealing layer in contact with a packaged product, an outer layer and an intermediate layer, wherein the heat-sealing layer comprises reinforced medium-density polyethylene and one or a mixture of more than two of very-low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer and ethylene alpha-olefin plastomer copolymer; the intermediate layer comprises ethylene-vinyl acetate copolymer; and the outer layer comprises one or a mixture of some of very-low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer and ethylene alpha-olefin plastomer copolymer. In the heat-sealing layer of the multilayer heat shrinkable film, the reinforced medium-density polyethylene with higher stiffness, better impact strength and better longitudinal tearing strength is added. In the invention, a proper amount of the reinforced medium-density polyethylene is coordinated with other components in the heat-sealing layer, thus the mechanical property of the multilayer heat shrinkable film can be obviously improved.
8 citations
Patent•
DSM1
TL;DR: In this paper, a flexible electrical generator consisting of at least one photovoltaic device and a flexible support was proposed. And the generator had a density as measured according to ISO1183 of between 860 and 930 kg/m3.
Abstract: The invention relates to a flexible electrical generator comprising at least one photovoltaic device and a flexible support, wherein said photovoltaic device is attached to the flexible support and wherein the flexible support comprises a fabric comprising high-strength polymeric fibers, said flexible support comprising also a plastomer wherein said plastomer is a semi-crystalline copolymer of ethylene or propylene and one or more C2 to C12 α-olefin co-monomers and wherein said plastomer having a density as measured according to ISO1183 of between 860 and 930 kg/m3.
7 citations
Patent•
28 Oct 2011
TL;DR: In this article, a heterophasic polypropylene copolymer with a total comonomer content of at least 5.0 wt.-% and a content in the xylene cold soluble fraction in the range of 18.0 to 35.0 Wt.
Abstract: Polypropylene composition having a MFR 2 of at least 40 g/10min, said composition comprises a heterophasic propylene copolymer with a total comonomer content of at least 5.0 wt.-% and a comonomer content in the xylene cold soluble fraction in the range of 18.0 to 35.0 wt.-%, a plastomer and a polysiloxane.
7 citations
Patent•
30 May 2011
TL;DR: In this paper, a polypropylene composition consisting of a heterophasic propylene copolymer and a plastomer is produced. But the composition is chemically different from the one in this paper.
Abstract: Process for producing a polypropylene composition comprising a heterophasic propylene copolymer and a plastomer, said process comprises the steps of
• feeding the heterophasic propylene copolymer into an extruder,
• applying shear stress in a first mixing zone on the heterophasic propylene copolymer,
• adding downstream to the first mixing zone the plastomer to the heterophasic propylene copolymer,
• applying shear stress in a second mixing zone on the heterophasic propylene copolymer and the plastomer (P),
• discharging the polypropylene composition from the extruder ,
wherein further
the heterophasic propylene copolymer (HECO) comprises a polypropylene matrix and an elastomeric propylene copolymer being dispersed in said polypropylene matrix,
and
the elastomeric propylene copolymer and the plastomer are chemically different.
6 citations
Patent•
21 Sep 2011
TL;DR: In this paper, the authors proposed a polymer-bonded asphalt composition that produces a reaction product having a high softening point, being hard to be cracked even at a low temperature and having high strength.
Abstract: PROBLEM TO BE SOLVED: To provide a polymer-bonded asphalt composition that produces a reaction product having a high softening point, being hard to be cracked even at a low temperature and having high strength.SOLUTION: The polymer-bonded asphalt composition comprises a) asphalt, b) an ethylene/n-butyl(meth)acrylate/glycidyl (meth)acrylate terpolymer and c) a styrenic elastomer. The content of (e) a plastomer having a weight average molecular weight of 7,000 or less in the polymer-bonded asphalt composition is less than 0.1 mass%, and an epoxy group which the component b) has reacts with a functional group which the component a) has.
4 citations
Patent•
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07 Jun 2011
TL;DR: In this paper, the authors describe a yarn-coated high modulus polyethylene (HMPE) yarns with a plastomer, the plastomers being a semi-crystalline copolymer of ethylene or propylene and one or more C2 to C12 a-olefin co-monomers and having a density between 870 and 930 kg/m3.
Abstract: The invention relates to a rope containing high modulus polyethylene (HMPE) yarns wherein the rope is coated with a plastomer, the plastomer being a semi-crystalline copolymer of ethylene or propylene and one or more C2 to C12 a-olefin co-monomers and the plastomer having a density as measured according to ISO1183 of between 870 and 930 kg/m3.
3 citations
Patent•
26 May 2011
TL;DR: In this article, a new plastomer material for use in automotive parts such as bumpers is devised, which is a novel polyethylene produced by a gas phase process.
Abstract: New plastomer material for use in automotive parts such as bumpers is devised here, which is a novel polyethylene produced by a gas phase process.
2 citations
Patent•
16 Jun 2011
TL;DR: In this paper, a manufacturing method is provided to reinforce weather resistance, flexibility and flexural rigidity of finished products and to improve printability, thereby aesthetic aspects of floor materials are impressive and workability is improved.
Abstract: PURPOSE: A manufacturing method is provided to reinforce weather resistance, flexibility and flexural rigidity of finished products and to improve printability, thereby aesthetic aspects of floor materials are impressive and workability is improved. CONSTITUTION: As to floor materials used for a floor side of building installation, the polyolefin-group environment-friendly floor material(100) is laminated with a solubility index 5.4 or 5.7g / 10min, to a density 1.0 or 1.1g / cm^3, a melting point 128°C or 130°C to, a softening point 98 or 105°C, to a tensile strength 350 or 370kg /cm^3, an extension rate 240 or 250% range of a low density polyethylene and polymethylmetaacrylate resin, a transparency Mori Ramulus layer(11) of 270μm to a thickness 230 of a product configuration in which a copolymers compound is coextruded to a sheet. The polyolefin-group environment-friendly floor material is laminated with a surface layer(10), in which a quick drying (HOT MELT) adhesive of an ethyl vinyl acetate resin system, has with the first glue layer(12) of the product configuration coextruded into one body to a thickness 20 or 50μm in the lower part of the transparency Mori Ramulus layer, the polyolefin-group environment-friendly floor material is laminated with a printing sheet layer(23), in which a thermoplastic plastomer compound consisting of weather resistance promoter, titanium oxide, is coextruded into sheets, and a printing sheet(21) of a thickness 60 or 70μm has a print pattern(22), The polyolefin-group environment-friendly floor material is laminated with a printing layer(20), in which a quick drying (HOT MELT) adhesive of an ethyl vinyl acetate resin system, has with the second glue layer(24) of the product configuration coextruded into one body to a thickness 20 or 50μm in the lower part of the printing sheet, the polyolefin-group environment-friendly floor material is laminated with a stop layer(30) of a solubility index 3.85 or 4.0g / 10min, a density 1.05 or 1.3g / cm^3, a melting point 121 or 127°C, a softening point 101 or 107°C, and a denaturation linear low density polyethylene system thermoplastic plastomer compound processed by a calendar mode into a sheet of a thickness 1.3 and a density 1.7 or 1.9, the polyolefin-group environment-friendly floor material is laminated with a balance layer(50), a undenrlying layer(40), the stop layer, the printing layer and the surface layer, from the bottom of the floor materials, in order.
Patent•
18 Apr 2011
TL;DR: In this article, a thermoplastic copolyester elastomer, a plastomer and a polyolefin polymer grafted with an ethylenically unsaturated compound, functionalized with a functional group are presented.
Abstract: Polymer composition containing: A. A thermoplastic copolyester elastomer, B. a plastomer, C. a polyolefin polymer grafted with an ethylenically unsaturated compound, functionalized with a functional group.
01 Jan 2011
TL;DR: In this article, the effect of thermoplastic elastomer styrene-ethylene/butylene-styrene block copolymer, SEBS, as impact modifier for polypropylene, PP, was investigated.
Abstract: Polypropylene, PP, is a versatile commodity plastic with one of the largest global consumption because of its low cost and attractive final properties. Although, its application is rather limited because of its relatively moderate fracture performance. The addition of thermoplastic elastomer could lead to improving impact properties of plastomer materials. In this paper, effort has been undertaken to study the effect of thermoplastic elastomer styrene-ethylene/butylene-styrene block copolymer, SEBS, as impact modifier for polypropylene, PP. Blends of plastomer/thermoplastic elastomer, PP/SEBS, were prepared by twin-screw extruder and parameters of torque, pressure and capacity were followed during processing. Fractal analysis of processing parameters was performed and Hurst index determined. Instron Mechanical Machine was used to determine mechanical properties of investigated blends, tensile strength, elongation at break and yield, while impact properties of PP/SEBS blends were obtained by Izod. Tribological behaviour of PP/SEBS blends were investigated by multiple scratch tests performed by CSEM Micro-Scratch Tester. Results show that styrene-ethylene/butylene –styrene block copolymer acts as a good impact modifier for polypropylene
Patent•
30 Nov 2011
TL;DR: In this article, a supporting roller has a support roller casing with two bearing retainers arranged at the end regions (4a, 4b) of the casing along a longitudinal direction (L).
Abstract: The roller has a supporting roller casing (4) with a supporting roller casing inner surface (15), and two bearing retainers (5, 6) that are arranged at end regions (4a, 4b) of the casing. The end regions are arranged at a distance from another along a longitudinal direction (L). Damping units (3a, 3b, 3c) are arranged at a distance from the retainers. The damping units apply a predetermined contact pressure to the inner surface along the longitudinal direction. The damping units comprise a polymer, an elastomer, a vulcanized rubber and a plastomer.
Patent•
18 Nov 2011
TL;DR: In this article, a flexible electrical generator consisting of at least one photovoltaic device and a flexible support was proposed. And the generator had a density as measured according to ISO1183 of between 860 and 930 kg/m3.
Abstract: The invention relates to a flexible electrical generator comprising at least one photovoltaic device and a flexible support, wherein said photovoltaic device is attached to the flexible support and wherein the flexible support comprises a fabric comprising high-strength polymeric fibers, said flexible support comprising also a plastomer wherein said plastomer is a semi-crystalline copolymer of ethylene or propylene and one or more C2 to C12 a-olefin co-monomers and wherein said plastomer having a density as measured according to ISO1183 of between 860 and 930 kg/m3.