Plastomer

About: Plastomer is a research topic. Over the lifetime, 388 publications have been published within this topic receiving 4160 citations.

Formation of EDA Complexes in Polymer Mixtures

Abstract: Heterogeneous mixtures of elastomers and plastomers are of practical importance and have been widely investigated. As a result of a small difference in solubility parameter values a diffusion boundary between components of a mixture or an interfacial chemical bonding between polymers are formed. It is commonly accepted that good mechanical properties of such a systems in the two mentioned cases are observed. It is also evident that mixing conditions and a morphology of a mixture play an important role. In this work it was rather unexpectedly stated that the presence of polyacrylonitrile in blends causes strong increase of viscosity and tensile strength of unsaturated elastomers. Those effects are clearly related to double bonds content in elastomer. A lowered segmental mobility of a matrix in the vicinity of plastomer domains was observed by means of mechanical spectrometry and pulsed NMR methods. It is concluded that the charge transfer mechanism between cyano groups of polyacrylonitrile and double bonds is probably responsible for that phenomenon. This hypothesis was confirmed on the basis of IR and UV spectroscopy examinations of model substances: dodecene-1 and butyronitrile. The constitution of the complex was established and the enthalpy of its formation calculated.

Frequency-dependent on the magnetorheological effect of magnetorheological plastomer

Abstract: A low cross-linked magnetic polymer matrix also known as magnetorheological plastomer (MR plastomer) containing micron-sized carbonyl iron particles (CIPs) is a new kind of MR materials. MR plastomer can be prepared by two main methods which are physically and chemically crosslinking. However, the study on the dynamic properties of involving chemically crosslinked MR plastomer particularly the viscoelastic properties especially frequency-dependent are not systematically investigated. Therefore, in this study, the effect of the frequency on the MR effect and damping performance of chemically crosslinking MR plastomer under oscillatory modes condition were analysed. The magnetic particles namely CIPs were inserted into a plasticine-like polymer matrix causing the materials to exhibit an MR effect in response to an external magnetic field. Polymer base matrix was prepared using poly-vinyl alcohol (PVA), and boric acid (BA) was used as a cross-linking agent for chemically crosslinked MR plastomer. The MR plastomer samples were prepared using 70 wt% of CIPs as magnetic particles. The samples were tested using a rheometer with different test frequencies, which are 1, 5, and 10 Hz at the on-state condition. The experimental results revealed that the frequency has a significant correlation with the MR effect of samples where the MR effect of the sample decreased with the increment of test frequency. The MR effect for each sample at 1, 5, and 10 Hz are 6793, 5049, and 3131% respectively. In contrast, for the frequency sweep test, the storage modulus of the sample showed an increasing trend with the increment of test current, while the loss factor revealed an opposite result. The results proved that this kind of MR materials has the potential to be used in various of applications like soft actuator, vibration absorber, and force sensor.

Polyethylene and propylene wax for hot melt adhesive

Abstract: The invention provides a polyolefin composition comprising a) 60 to 99 wt% of a polyethylene plastomer, wherein said polyethylene is a copolymer of ethylene and one or more C 3 -C 12 α-olefins, having a density of less than 904 kg/m 3 ; and b) 1 to 40 wt% of a polypropylene copolymer wax having a melt flow rate (MFR) at 230 °C/2.16 kg of more than 400 g/10min.

Flexible generator and preparation method thereof

Abstract: The present invention provides a flexible generator and a preparation method thereof, the flexible generator comprising a triboelectric device and a flexible support, wherein the triboelectric deviceis connected to the flexible support, the flexible support comprising a fabric comprising high strength polymer fibers and a plastomer, the plastomer includes a semi-crystalline copolymer made from ethylene or propylene and one or more C2-C12[alpha]-olefin comonomers, the plastomer having a density of from 860 kg/m3 to 930 kg/m3. The flexible generator provided by the invention has good mechanicalstability, can effectively collect low-frequency energy acting on the flexible generator, and has good durability and prolonged service life.

Propylene copolymer composition with excellent optical and mechanical properties

Abstract: The present invention is directed to a polypropylene composition (P) comprising a copolymer (C) of propylene and 1-hexene comprising a first random propylene copolymer (A) of propylene and a 1-hexene, and a second random propylene copolymer (B) of propylene and 1-hexene having a higher 1-hexene content than the first random propylene copolymer (A) as well as a plastomer (PL) being an elastomeric copolymer of ethylene and at least one C4 to C10 α-olefin. Further, the present invention is directed to an article comprising said polypropylene composition (P) and the use of said polypropylene composition (P) as a sealing layer in a multi-layer film.