Showing papers on "Plastomer published in 2021"
TL;DR: In this article, a review article describes the details of using plastomers as bitumen modifiers, with a specific focus on recycled plastics, and how these can potentially be used to enhance bitumen performance and the road durability.
Abstract: The failure of bituminous pavements takes place due to heavy traffic loads and weather-related conditions, such as moisture, temperature, and UV radiation. To overcome or minimize such failures, a great effort has been put in recent years to enhance the material properties of bitumen, ultimately improving field performance and increasing the pavement service life. Polymer modification is considered one of the most suitable and by far the most popular approach. Elastomers, chemically functionalised thermoplastics and plastomers * (* Note: notwithstanding the fact that in Polymer Science the word ‘plastomer’ indicates a polymer with the simultaneous behaviour of an elastomer and plastics (thermoplastics), this paper uses the term ‘plastomer’ to indicate a thermoplastic polymer as it is more commonly found in Civil and Pavement Engineering.) are the most commonly used polymers for bitumen modification. Plastomers provide several advantages and are commonly acknowledged to improve high-temperature stiffness, although some of them are more prone to phase separation and consequent storage instability. Nowadays, due to the recent push for recycling, many road authorities are looking at the use of recycled plastics in roads. Hence, some of the available plastomers—in pellet, flakes, or powder form—are coming from materials recycling facilities rather than chemical companies. This review article describes the details of using plastomers as bitumen modifiers—with a specific focus on recycled plastics—and how these can potentially be used to enhance bitumen performance and the road durability. Chemical modifiers for improving the compatibility between plastomers and bitumen are also addressed in this review. Plastomers, either individual or in combination of two or three polymers, are found to offer great stiffness at high temperature. Different polymers including HDPE, LDPE, LLDPE, MDPE, PP, PS, PET, EMA, and EVA have been successfully employed for bitumen modification. However, each of them has its own merit and demerit as thoroughly discussed in the paper. The recent push in using recycled materials in roads has brought new light to the use of virgin and recycled plastomers for bitumen modification as a low-cost and somehow environmental beneficial solution for roads and pavements.
24 citations
TL;DR: In this paper, a liquid-metal-filled magnetorheological plastomer (LMMRP) is reported to have a high response behavior to the external stimulus such as magnetic field, temperature, and force.
14 citations
TL;DR: In this paper, the dispersion of polypropylene (PP) within bitumen and its effect on the thermo-mechanical performance of PMB were investigated. But the results of the experiments were limited.
14 citations
TL;DR: In this paper, the relationship between structure of plastomer and the function of final product TPO was tried to be explained by structural characterization and molecular dynamic (MD) simulations.
5 citations
13 May 2021
TL;DR: Several types of elastomeric materials have been outlined in this paper with a particular emphasis on naturally occurring and bottlebrush ELastomer/plastomer materials. And different types of smart ELASTomeric material have also been covered in this chapter.
Abstract: Elastomeric materials are among the important classes of versatile polymers and provide exceptional advantages such as softness, stability, elasticity, and extensibility. Plastomers as a polymeric material combine characteristics and features of plastics and elastomers including rubber-like features with the handling capability of plastic materials. The word “plastomer” is a portmanteau of “plastic” and “elastomer”. Thanks to their unique features, elastomers and plastomers have been widely employed, individually and in combination with identical or non-identical families, in various applications. In this chapter, several types of elastomeric and plastomeric materials have been outlined with a particular emphasis on naturally occurring and bottlebrush elastomer/plastomer materials. Different types of smart elastomeric materials have also been covered in this chapter. It was attempted to discuss how and to what extent the novel elastomeric materials have functioned in tires, electric and electronic devices, actuators, soft robotics, microfluidics, tissues and other products.
1 citations
Patent•
14 Jan 2021
TL;DR: In this article, the use of a propylene copolymer composition in a single-ply roofing membrane is described, where the mixture is composed of a matrix phase and an elastomeric phase dispersed in the matrix phase.
Abstract: The present invention relates to a propylene copolymer composition comprising (A) from 50.0 to 90.0 wt%, based on the total amount of the propylene copolymer composition, of a heterophasic propylene copolymer having a matrix phase and an elastomeric phase dispersed in said matrix phase, wherein the matrix phase is a propylene random copolymer, the heterophasic propylene copolymer further having a melt flow rate MFR2 of 0.2 to 12.0 g/10 min, determined according to ISO 1133 at a temperature of 230°C and a load of 2.16 kg, and a xylene cold solubles (XCS) fraction in the range of from 20.0 to 50.0 wt% based on the total amount of the heterophasic propylene copolymer (A), determined according to ISO 16152 at a temperature of 25°C, (B) from 5.0 to 25.0 wt%, based on the total amount of the propylene copolymer composition, of a propylene based plastomer having a density in the range of from 845 to 870 kg/m³, determined according to ASTM D1505 on compression moulded test specimens and a melt flow rate MFR2 of 1.0 to 30.0 g/10 min, determined according to ISO 1133 at a temperature of 190°C and a load of 2.16 kg, and (C) from 5.0 to 25.0 wt%, based on the total amount of the propylene copolymer composition, of an ethylene based plastomer having a density in the range of from 850 to 900 kg/m³, determined according to ISO1183D on compression moulded test specimens and a melt flow rate MFR2 of 0.5 to 30.0 g/10 min, determined according to ISO 1133 at a temperature of 190°C and a load of 2.16 kg, an article comprising said propylene copolymer composition and the use of said propylene copolymer composition in a single ply roofing membrane.
Patent•
22 Apr 2021
TL;DR: In this article, a polymer composition suitable for coating a polyolefin fabric substrate comprising the following components: A) 5 to 35 wt.-% based on the overall weight of the polymer composition of a recycled polyoleft fabric substrate; wherein said fabric substrate is coated with a poly-olefin composition comprising of following components, a1) an ethylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.857 to 0.915 g/cm3 and a MFR2 (230°C, 2.
Abstract: The present invention relates to a polymer composition suitable for coating a polyolefin fabric substrate comprising the following components: A) 5 to 35 wt.-% based on the overall weight of the polymer composition of a recycled polyolefin fabric substrate; wherein said fabric substrate is coated with a polyolefin composition comprising the following components: a1)an ethylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.857 to 0.915 g/cm3 and a MFR2 (190°C, 2.16 kg) determined according to ISO 1133 in the range of 0.5 to 30 g/10 min; and a2) a propylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.850 to 0.910 g/cm3 and a MFR2 (230°C, 2.16 kg) determined according to ISO 1133 in the range of 0.01 to 30 g/10 min; B) 65 to 95 wt.-% based on the overall weight of the polymer composition of a virgin polyolefin composition comprising the following components: b1) an ethylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.857 to 0.915 g/cm3 and a MFR2 (190°C, 2.16 kg) determined according to ISO 1133 in the range of 0.5 to 30 g/10 min; and b2) a propylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.850 to 0.910 g/cm3 and a MFR2 (230°C, 2.16 kg) determined according to ISO 1133 in the range of 0.01 to 30 g/10 min. Furthermore, the present invention relates to use of component A) for coating a virgin or recycled polyolefin fabric substrate, to a process for coating a polyolefin fabric substrate, to a polyolefin fabric substrate coated with the composition according to the invention and to an article comprising at least one component formed from the coated polyolefin substrate.
TL;DR: In this article, the authors investigated the dual properties of PVA-based magnetorheological plastomer (MRP) under the influence of different solvent compositions by varying the ratios of binary solvent mixture (dimethyl sulfoxide (DMSO) to water.
Abstract: Polyvinyl alcohol (PVA)-based magnetorheological plastomer (MRP) possesses excellent magnetically dependent mechanical properties such as the magnetorheological effect (MR effect) when exposed to an external magnetic field. PVA-based MRP also shows a shear stiffening (ST) effect, which is very beneficial in fabricating pressure sensor. Thus, it can automatically respond to external stimuli such as shear force without the magnetic field. The dual properties of PVA-based MRP mainly on the ST and MR effect are rarely reported. Therefore, this work empirically investigates the dual properties of this smart material under the influence of different solvent compositions (20:80, 40:60, 60:40, and 80:20) by varying the ratios of binary solvent mixture (dimethyl sulfoxide (DMSO) to water). Upon applying a shear stress with excitation frequencies from 0.01 to 10 Hz, the storage modulus (G′) for PVA-based MRP with DMSO to water ratio of 20:40 increases from 6.62 × 10−5 to 0.035 MPa. This result demonstrates an excellent ST effect with the relative shear stiffening effect (RSTE) up to 52,827%. In addition, both the ST and MR effect show a downward trend with increasing DMSO content to water. Notably, the physical state of hydrogel MRP could be changed with different solvent ratios either in the liquid-like or solid-like state. On the other hand, a transient stepwise experiment showed that the solvent’s composition had a positive effect on the arrangement of CIPs within the matrix as a function of the external magnetic field. Therefore, the solvent ratio (DMSO/water) can influence both ST and MR effects of hydrogel MRP, which need to be emphasized in the fabrication of hydrogel MRP for appropriate applications primarily with soft sensors and actuators for dynamic motion control.
Patent•
28 Jan 2021
TL;DR: In this paper, a flame retardant polyolefin composition comprising an ethylene-based plastomer with a density in the range of 0.850 to 0.915 g/cm3 and an MFR2 in the ranges 0.5-30 g/10 min was proposed.
Abstract: The invention provides a flame retardant polyolefin composition comprising a) an ethylene based plastomer with a density in the range of 0.850 to 0.915 g/cm3 and an MFR2 in the range 0.5-30 g/10 min; b) a propylene based plastomer with a density in the range of 0.860 to 0.910 g/cm3 and an MFR2 in the range 0.01-30 g/10 min; and c) a flame retardant.
Patent•
22 Apr 2021
TL;DR: In this paper, the authors proposed a polymer composition comprising the following components: A) 5 to 35 wt.-% based on the overall weight of the polymer composition of a recycled polyolefin fabric substrate; wherein said fabric substrate is coated with a poly-olefin composition comprising of following components, a1) an ethylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.857 to 0.915 g/cm3 and a MFR2 (190°C, 2.16 kg) determined according according to
Abstract: The present invention relates to a polymer composition comprising the following components: A) 5 to 35 wt.-% based on the overall weight of the polymer composition of a recycled polyolefin fabric substrate; wherein said fabric substrate is coated with a polyolefin composition comprising the following components: a1) an ethylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.857 to 0.915 g/cm3 and a MFR2 (190°C, 2.16 kg) determined according to ISO 1133 in the range of 0.5 to 30 g/10 min; and a2) a propylene based plastomer with a density determined according to ISO 1183-1 in the range of 0.850 to 0.910 g/cm3 and a MFR2 (230°C, 2.16 kg) determined according to ISO 1133 in the range of 0.01 to 30 g/10 min; B) 65 to 95 wt.-% based on the overall weight of the polymer composition of a homopolypropylene or a recycled polymer blend comprising b1) polypropylene and b2) polyethylene, wherein the weight ratio of b1) to b2) is from 3:7 to 12:1; with the proviso that components A) and B) add up to 100 wt.-%. Furthermore, the present invention relates to use of component A) for increasing the Charpy Notched Impact Strength of component B) and to an article comprising the polymer composition according to the present invention.
Patent•
15 Apr 2021
TL;DR: In this article, the authors proposed a process for reducing the volatile organic compound (VOC) content of plastomers, which is the process comprising the steps of subjecting the plastomer in granular form containing VOCs which is contained in an aeration vessel to a gasflow, and withdrawing granular plastym from the aeration van which has a lower content of VOC, wherein the average particle size of the granular Plastomer is greater than 2.5 mm, and the gas has a minimum temperature of at least 26° C. measured
Abstract: The present invention relates to a process for reducing the volatile organic compound (VOC) content of plastomers the process comprising the steps of subjecting the plastomer in granular form containing VOCs which is contained in an aeration vessel to a gasflow, and withdrawing granular plastomer from the aeration vessel which has a lower content of VOCs, wherein the average particle size of the granular plastomer is greater than 2.5 mm, preferably greater than 2.7 mm, more preferably greater than 3.0 mm, wherein the gas has a minimum temperature of at least 26° C. measured at a gas inlet of the aeration vessel, and a maximum temperature of 4° C. below the Vicat temperature (10N, ISO 306) of the granular plastomer or 35° C. measured at the gas inlet of the aeration vessel, whatever value is lower, and wherein at least a part of the withdrawn granular plastomer is recirculated to the aeration vessel.
11 Apr 2021
TL;DR: In this article, propylene-ethylene copolymer plastomer (POP) was selected as the filler to improve the mechanical properties of polypropylene matrix and obtain better dispersibility.
Abstract: By blending elastomers, the mechanical properties of polypropylene can be effectively improved then meet the mechanical performance requirements of cable insulation materials. Common elastomer fillers are POE (Polyolefin Elastomer), SBS (Styrene butadiene styrene) and SEBS(Styrene Ethylene Butylene styrene). However, these fillers either have a certain polarity or are not similar to the structure of the matrix molecules, resulting in poor dispersion of the elastomer in the matrix and a significant decrease in electrical properties. In this paper, propylene-ethylene copolymer plastomer (polyolefin plastomer POP) is selected as the filler. Because its molecule contains propylene units, it can be better compatible with the polypropylene matrix and is expected to obtain better dispersibility. This paper studies the SEM, DSC, DMA, space charge and DC breakdown strength of POP/PP composites, and compared the properties with POE/PP materials. It is found that POP exhibits better dispersibility compared with POE; POP/PP has less space charge and the DC breakdown strength of POP/PP is higher than that of POE/PP; POP has a slightly weaker effect to reduce the elastic modulus of the composite. Since the addition of elastomer will destroy the crystallinity of the PP phase, thereby reducing the DC dielectric properties of the composite system, and as the addition weight of elastomer increases, the dielectric properties of the composite material decrease more significantly. The dispersibility of POP in PP is better than that of POE, and it has good compatibility. It has relatively little negative effect on the crystal regularity of the PP matrix. Therefore, the dielectric properties of POP/PP are better than that of POE/PP system, which has less space charge and has higher DC breakdown strength.