Showing papers on "Plastomer published in 2018"

Effect of ageing on the morphology and creep and recovery of polymer-modified bitumens

Abstract: Polymer additives are used to improve the properties of road bitumens including their oxidative resistance. However, their usage as anti-oxidative materials remains relatively unclear. This study aims to investigate the changes in the morphology and the rheological response of polymer modified bitumens used in road pavement construction caused by ageing. An elastomer (radial styrene butadiene styrene, SBS) and a plastomer (ethyl vinyl acetate, EVA) polymer were mixed with one base bitumen at three polymer concentrations. The bitumens were RTFO and PAV aged. The morphology of the bitumens was captured by fluorescence microscopy while the rheological properties were measured by means of the multiple stress creep and recovery (MSCR) test. The results show that the morphology of the SBS modified bitumen degrades with ageing as a function of polymer concentration and dispersion, with higher dispersion being more resistant. The morphology of the EVA modified bitumen has a low ageing susceptibility irrespective of polymer concentration. The MSCR response of EVA modified bitumens does not differ from that found for unmodified bitumen, where the hardening produces a decrease in the non-recoverable compliance. In the case of SBS modified bitumen, the degradation of the polymer backbone affects the bitumen hardening as much as the polymer phase dispersed and networked in the bitumen phase. Furthermore, in the case of the elastomer, the average percent recovery is in agreement with the variation of the morphology with ageing. Therefore, the use of the average percent recovery as a valuable rheological index of the integrity of the polymer network can be advocated.

Thermoset insulation composition

Abstract: Crosslinkable insulation materials, which are commonly halogen-free, for use in wire and cable applications are provided. The insulation include a crosslinkable thermoplastic polymer and flame retardant material. The flame retardant material may include a metal hydroxide flame retardant, such as a magnesium, calcium, zinc and/or aluminum hydroxide. The crosslinkable thermoplastic polymer includes silane-grafted polymer blend, which includes a polyolefin plastomer blended with one or more other thermoplastic polymers. The crosslinkable thermoplastic polymer may be curable by exposure to moisture and may include moisture curable silane functionality in the crosslinkable thermoplastic polymer.

High/low temperature-resistant film-covering packaging glue and preparation method thereof

Abstract: The invention discloses high/low temperature-resistant film-covering packaging glue. The glue comprises, by weight, 35 to 45 parts of an AFFINITYTM GA polyolefin plastomer (POP), 1 to 9 parts of hydrogenated styrene-butadiene rubber, 15 to 25 parts of wax, 30 to 40 parts of hydrogenated petroleum resin, 1 to 9 parts of rosin-modified phenolic resin and 0.3 to 1 part of an antioxidant. The invention also discloses a preparation method of the high/low temperature-resistant film-covering packaging glue. The high/low temperature-resistant film-covering packaging glue has excellent fast-adhesion and high/low temperature resistance, has good adhesion to a film-coated substrate, utilizes the GA polyolefin plastomer (POP) produced by the AFFINITY company as a main polymer, utilizes a small amountof SEBS, can be sprayed to form bars or dots in a melting state and realizes laminated material breaking in short time after cooling curing.

Thermal insulation elastomer modified asphalt coating as well as preparation method and waterproof coil thereof

Abstract: The invention relates to the field of building waterproof materials, in particular to a thermal insulation plastomer modified asphalt coating as well as a preparation method and a waterproof coil thereof. The thermal insulation plastomer modified asphalt coating is characterized by being prepared from the following raw materials in parts by mass: 35-60 parts of natural asphalt, 2-15 parts of a softener, 0.1-5 parts of graphene aerogel, 3-15 parts of thermoplastics, 1-12 parts of rubber and 15-40 parts of a filler. The thermal insulation plastomer modified asphalt coating and the waterproof coil have the beneficial effects that the thermal insulation plastomer modified asphalt coating and the waterproof coil have thermal insulation performance, the modified asphalt waterproof coil is endowed with the thermal insulation function without influencing the waterproof performance of the modified asphalt waterproof coil, and an application range of the building waterproof materials is expanded.

High-shrink, high-strength multilayer film containing three-component blend

Abstract: A heat-shrinkable film comprises a blend of 35-75 wt % of an ethylene-based polymer, 10-45 wt % of an ethylene/unsaturated ester copolymer, and 5-30 wt % of a plastomer, with the blend making up at least 20 wt % of the film. The ethylene-based polymer has a peak melt point ≥ 95°C. The plastomer has a peak melt point ≤ 90°C and a melt index of ≤ 1.1 g/10min. The film comprises a cross-linked polymer network which has been strained by solid state orientation. The film has a total free shrink at 85°C of at least 90% and an energy-to-break of at least 0.70 J/mil.

Radar radome based on high strength composite material

Abstract: The invention discloses a radar radome based on a high strength composite material. The radar radome is sequentially formed by a weather fastness exterior coating, a composite material exterior skin,a base plate, a composite material interior skin and a wave-transmitting interior coating, the composite material exterior skin and the composite material interior skin are formed by mixing high strength polymer fiber and plastomer, wherein the weight ratio of the high strength polymer fiber to the plastomer is 2.5-3.5:1.5-2.5. The radar radome has the advantages of being reasonable in structuraldesign, and the radar radome has better ripping resistance and high breakdown strength performance while better wave-transmitting rate is obtained.

Preparation method of nano sound insulation material

Abstract: The invention discloses a preparation method of a nano sound insulation material. BaSO4, a MgAl2O4/Fe-MOF nano material, PVC (polyvinyl chloride) resin, polyolefin plastomer (POP), stearic acid and chlorinated paraffin are taken as main raw materials, an organic metal porous complex Fe-MOF is prepared by adopting an electrolysis technology, MgAl2O4 and a metal crystal material are subjected to silicone coupling treatment, so that sound insulation functional particles with different grain sizes are uniformly distributed in PVC resin according to a volume complementary filling principle and formelastic interface bonding with substrate resin, the spatial topological advantage of a metal modified skeleton structure can be brought into full play, the influence to the environment is less, and the obtained product is good in sound insulation property and wide in application range, and can be widely applied to preparation process of various kinds of sound insulation materials so as to performthe sound insulation property.

Non-polyvinylchloride surface covering

Abstract: A non-polyvinylchloride (non-PVC) surface covering is provided. The non-PVC surface covering includes a bottom material layer. A middle layer is disposed on the bottom material layer, wherein the middle layer includes a middle material layer. A transparent abrasion-resistant layer is disposed on the middle layer, wherein the transparent abrasion-resistant layer includes a polyolefin of 40˜94.95 wt %, a polyolefin elastomer (POE) or a polyolefin plastomer (POP) of 5˜50 wt %, and a processing agent of 0.05˜10 wt %.