Showing papers on "Plastomer published in 2016"

Ageing in modified bitumen using FTIR spectroscopy

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 ...

Effect of Moisture on Cohesion of Asphalt Mastics and Bonding with Surface of Aggregates

Abstract: Moisture damage of asphalt mixtures can be caused either by adhesive failure between asphalt binder and aggregate surface or by cohesive failure within the asphalt mastic caused by the interaction with moisture. Many studies have tested the bonding interaction of aggregate and asphalt binders using the Bitumen Bond Strength (BBS) test, however there is very limited research on effect of moisture on cohesive failure caused by asphalt mastic bonding deterioration. The objective of this study is to determine the effect of different mineral fillers in asphalt mastic on moisture damage resistance using BBS test. Results collected indicate that surface area of mineral fillers and mineralogy of filler have significant effect on moisture damage resistance. Results also show that there is significant effect of asphalt modification on moisture damage measurements. In this study asphalt modification included a plastomer, an elastomer and a mix of plastomer and elastomer (hybrid). For the binders and fillers used in the study the most effective moisture damage resistance for all the filler types was found with the hybrid polymer combination that enhanced binding with filler and strength of binder. Analysis of results confirm cohesion failures of mastics could be more important than adhesion of mastics to large aggregates in the mixture. Thus, the concept of testing the mastic with the filler and polymers intended for production of mixture appears to give an effective tool to predict the adhesion and cohesion performance before and after water conditioning.

Optimum Blending Requirements for EVA Modified Binder

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.

Nanostructured Fly Ash as Reinforcement in a Plastomer-Based Composite: A New Strategy in Value Addition to Thermal Power Station Fly Ash

Abstract: Class-F fly ash (FA) from a coal-fired thermal power station was subjected to high energy ball milling-induced mechanochemical activation aided by a surfactant. Subsequently, ethylene-octene copolymer/mechanochemically activated FA (EOC/MCA-FA) composites were prepared by solution casting. The surface modification of FA was confirmed from contact angle measurements and FTIR spectroscopy, which accounts for a good interaction between MCA-FA and the polymer matrix. X-ray diffraction reveals that the crystallite size of quartz phase present in FA got reduced, while the relative lattice strain on it increased during milling. Morphological studies revealed that interfacial adhesion between the polymer and MCA-FA is good and this accounts for the improvement in mechanical properties of the composites even at the minimum filler loading. Flame retardance of the matrix polymer is improved by the addition of either fresh FA or MCA-FA. The results imply that FA is a valuable reinforcing filler for ethylene-octene copolymer and its mechanochemical activation is an effective strategy for its future use.

Fatigue Rheological Characterization of Polymer-Modified Bitumens and Mastics

Abstract: Fatigue is one of the major distresses of flexible pavements and is mainly related to the rheological properties of the bituminous components of mixtures. In particular, bitumen and mineral filler create a blend called mastic that significantly influences the service life of asphalt pavements depending on its nature and composition. The purpose of this study is to investigate the effects of different polymer types and mineral fillers on the rheological behavior of a plain bitumen. Two types of polymer (an elastomer and a plastomer) were employed to produce polymer modified bitumens (PMBs) through laboratory mixing. Moreover, two fillers characterized by a different mineralogical nature (limestone and basalt) were selected in order to obtain several mastics. The dynamic shear rheometer (DSR) was used to study the fatigue behavior of all materials. Experimental data show that the effect of both polymer types is similar on mastics and bitumens as the presence of the elastomer leads to an improvement in fatigue life whereas the presence of the plastomer leads to a slight decrease in fatigue performance with respect to the plain bitumen, regardless of the mineral filler type. Moreover, the stiffening effect of mineral fillers was found to be significant regardless of filler mineralogy and bitumen type leading to a decrease in fatigue life with respect to bitumens. All mastics were less sensitive to the strain level applied as compared to the corresponding bitumens.

Effect of styrene–butadiene–styrene copolymer modification on properties of Saudi bitumen

Abstract: This research investigates the effects of styrene-butadiene-styrene (SBS) copolymer and other plastomers on the behavior of Saudi bitumen. Three bitumen samples, extracted from three Saudi oil refineries, namely Ras Tanura, Riyadh, and Yanbu, were used in this study. The bitumen samples were mixed with different modifiers in various compositions, forming polymer modified bitumens (PMBs). Elasticity parameters, such as ductility and elastic recovery were measured and evaluated. Characteristics of raw bitumen were analyzed to observe the compatibility of bitumen with SBS and plastomers. Bitumen samples were suitable for SBS modification and SBS PMBs showed superior elasticity behaviors compared to plastomer blends.

Assessment of Polyethylen-Modified Bitumen Adhesion Using Computer Image Analysis

Abstract: Abstract In order to achieve extended life of asphalt pavement, one of key points is to achieve a good bonding between it’s components. This research paper presents findings on the topic of influence of polyethylene bitumen modification on the adhesion between bitumen and aggregate. A novel method of quantifying the bitumen coated area, based on computer image analysis, has been developed for this study. Two different methods of adhesion testing were employed, namely boiling water method and the rolling bottle method. Aggregates used in this study were granite and limestone. Based on 108 measurements, it was concluded that polyethylene modification has a negative impact on binder aggregate adhesion.

Multi-layered films oriented in the machine direction and articles comprising the same

Abstract: The present invention provides uniaxially oriented films and packages formed from such films. In one aspect, a uniaxially oriented film comprises (a) a first layer comprising a polyolefin plastomer having a density of 0.865 to 0.908 g/cm 3 and a melt index (I 2 ) of 0.5-6 g/10 minutes, and at least one of a single-site catalyzed linear low density polyethylene having a density of 0.912 g/cm 3 to 0.935 g/cm 3 and a melt index (I 2 ) of 0.5 to 6 g/10 minutes, or a Ziegler-Natta catalyzed ultra low density polyethylene having a density of 0.880 g/cm 3 to 0.912 g/cm 3 , a melt index (I 2 ) of 0.5 to 6 g/10 minutes, and a MWD of 6.0 or less; (b) a second layer comprising a Ziegler-Natta catalyzed ultra low density polyethylene having a density of 0.880 g/cm 3 to 0.912 g/cm 3 , a melt index (I 2 ) of 0.5 to 6 g/10 minutes, and a MWD of 6.0 or less; and (c) at least one inner layer between the first layer and the second layer comprising at least one polyolefin. The film is oriented in the machine direction at a draw ratio of between 4:1 and 10:1, and can exhibit a machine direction 2% secant modulus of 85,000 psi or more when measured as per ASTM D882.

Soft and transparent propylene copolymers

Abstract: The present invention is directed to a polypropylene composition (C) comprising a heterophasic propylene copolymer (RAHECO) and a plastomer (PL) as well as a process for the preparation of said polypropylene composition and a film obtained from said polypropylene composition (C).

Polypropylene resin foam sheet, manufacturing polypropylene resin foam sheet and adhesive sheet

Abstract: PROBLEM TO BE SOLVED: To provide a polypropylene resin foam sheet capable of preventing immersion of water, dust or the like into electronic and electrical equipment even though thickness is thin.SOLUTION: There is provided a polypropyrene resin sheet obtained by foaming a resin composition containing at least one of a polypropylene resin, an olefin thermoplastic elastomer and a polyethylene plastomer, of which a central part in a thickness direction, a first surface part of one side of the thickness direction and a second surface part of another side are formed by the resin composition and having thickness of 0.05 to 0.5 mm, tensile strength of 0.1 to 30 MPa and 25% compressive stress of 10 to 150 kPa.SELECTED DRAWING: Figure 1

Plastomer modified asphalt waterproof coiled material

Abstract: The invention discloses a plastomer modified asphalt waterproof coiled material, which comprises: a substrate layer B, a top surface layer A bonded on the substrate layer B and a lower surface layer C bonded below the substrate layer B, wherein the top surface layer A and the substrate layer B are bonded to each other with plastomer modified asphalt, the substrate layer B and the lower surface layer C are bonded to each other with plastomer modified asphalt, the substrate layer B is prepared from polyester fiber cloth, glass fiber cloth or polyester fiber cloth, the top surface layer A is prepared from a polyethylene film, fine sand or mineral aggregates, the lower surface layer C is prepared from fine sand, and the particle size of the fine sand and the mineral aggregates is smaller than or equal to 0.6mm. The plastomer modified asphalt waterproof coiled material provided by the invention has good waterproof performance, and excellent low-temperature flexibility and heat resistance.

Film for packaging

Abstract: The present disclosure provides a film. In an embodiment, a multilayer film having at least three layers is provided. The multilayer film includes two skin layers, each skin layer composed of a blend of a low density polyethylene and an ethylene-based elastomer having a density less than 0.90 g/cc. The multilayer film also includes a core layer located between the skin layers. The core layer includes a propylene-based plastomer having a density less than 0.90 g/cc. The multilayer film has an onset end temperature from 90°C to 110°C and a heat seal strength at 120°C from 1.5 N/cm to 2.5 N/cm.

High-performance titanium-silicon molecular sieve catalyst and extrusion molding method thereof

Abstract: The invention provides a high-performance titanium-silicon molecular sieve catalyst and an extrusion molding method thereof. The method comprises the following steps: sufficiently mixing a titanium-silicon molecular sieve and silica sol to prepare a mixed material, adding an extrusion aid, a pore-forming agent and water into the mixed material, mixing uniformly, and kneading for molding to obtain a plastomer; extruding the molded plastomer through a extruder for molding a wet catalyst; treating the wet catalyst obtained in step C in a solution a; and drying and baking the catalyst treated in step D to obtain the finally molded titanium-silicon molecular sieve catalyst. The titanium-silicon molecular sieve catalyst can restrain side reactions, the properties of the extruded molded catalyst can be effectively improved, and in particular, in propylene epoxidation, the catalyst can improve the effective utilization rate of hydrogen peroxide and thus the economical efficiency of whole reaction is improved.

Artificial turf with improved tuft-lock

Abstract: Embodiments of the present disclosure are directed to stretched filaments comprising a non-functionalized polyolefin and at least one functionalized polymer. The functionalized polymer is a propylene-based plastomer or elastomer having one or more functional groups grafted on the propylene-based plastomer or elastomer. The one or more functional groups is selected from the group consisting of amine groups and imide groups. The at least one functionalized polymer has a DSC melting point from 100° C to 130° C. When the stretched filament is stretched to a stretch ratio of 5, the stretched filament has a tenacity greater than 0.90 cN/dtex

Plastic mold ejection structure

Abstract: The utility model relates to a plastic mold ejection structure, including the bottom plate, and set up the slide in the bottom plate top, and set up the plastomer of ski side, and set up the apron in the plastomer top, the bottom plate is inside to be provided with controller and battery, and the bottom plate upper surface is provided with elevating platform and guide rail, and the elevating platform below links to each other with the bottom plate, and the top of elevating platform links to each other with the slide, the slide upper surface is provided with ejector pin and connecting rod, plastomer bottom is provided with the roof, and the upper surface of plastomer is provided with the draw -in groove, the ejector pin all links to each other with the slide with the below of connecting rod, and the top of ejector pin is run through the plastomer and is linked to each other with the roof, and the top of connecting rod links to each other with the plastomer lower surface, the apron top is provided with the carrying handle, and the lower surface of apron is provided with the buckle, this plastic mold ejection structure is can effectual plastic mould with making ejecting, and the constructor of being convenient for takes out the plastic mould, and effectual quickening construction operating personnel's work efficiency has also reduced the possibility that the finished product damaged

Polymer compositions for extrusion coating

Abstract: The present invention relates to a polymer composition suitable to be used in extrusion coated articles as a heat sealable layer. The polymer composition comprises 10 to 60 wt-% of low density polyethylene and 90 to 40 wt-% of a plastomer, wherein the low density polyethylene has melt flow rate (MFR 2 ), measured according to ISO1133 (190 °C, 2,16 kg load) of 2,5 to 10 kg/lOmin, density 920 kg/m 3 or less, and the plastomer is an ethylene copolymer with at least one a- olefin comonomer of 4 to 10 C-atoms, and has a density of 880 to 915 kg/m3. The invention relates also to the extrusion coated article and preparation thereof, the article comprising a substrate layer, at least one heat sealable layer and optionally at least one additional layer, wherein the at least one heat sealable layer is located on at least one surface of the extrusion coated article.

Multi-layer shrink film, label and container

Abstract: A multi-layer shrink film (10) including a skin layer (13) and a core layer (11) is disclosed. The skin layer comprises at least 50% by weight of a cyclic olefin copolymer and the core layer comprises from 5% by weight to 50% by weight of a propylene based elastomer, from 20% by weight to 50% by weight of a propylene based plastomer, from 1% by weight to 20% by weight of a hydrocarbon resin and from 5% by weight to 30% by weight of a cyclic olefin copolymer. The multi-layer shrink film (10) exhibits a density of below 0.96 g/cm 3 and has excellent shrinkage and stiffness.

Viscoelastic solid-fluid transition in bitumen using rheology and FTIR spectroscopy

Abstract: Current binder investigations focus on the behaviour of the material from the perspective of failure and do not address the behaviour of the material in the temperature regime between such extremities (20 to 60°C). In this regime, the response of the binder transitions from a viscoelastic solid to a viscoelastic fluid. In this investigation, the transition was quantified using two scales of measurement, one at the microscopic scale and another at the macroscopic scale. At the macroscopic scale, temperature sweep and frequency sweep experiments were performed while at the microscopic scale, FTIR spectroscopy was performed. The transition temperature was estimated for an unmodified and a plastomer modified bitumen in unaged and short—term aged conditions. The transition regime captured from rheological techniques was much more sensitive to the influence of modification process and aging condition, while such sensitivity was not seen in the FTIR measurements.

Influence of association of "EVA-NBR" on indirect tensile strength of modified bituminous concrete

Abstract: The aim of this work is to contribute to the improvement of the mechanical properties of bituminous concrete by modification of bituminous concrete. In this study, we present the results of the indirect tensile strength “ITS” of modified bituminous concrete by the combination of two modifiers, one is a plastomer EVA (Ethylene Vinyl Acetate) and the other is a industrial waste from the shoe soles grinding NBR (Nitrile Butadiene Rubber) as crumb rubber. To modify the bitumen a wet process was used. The results show that the modification of bitumen by EVA-NBR combination increases their resistance to the indirect traction “ITS” compared to the bituminous concrete control. The mixture of 5% [50% EVA+ 50% NBR] is given the best result among the other associations.