Linear low density polyethylene composites

SK Corp. Biodegradable linear low-density polyethylene composition and film thereof. Korean patent KR20010084444 (2001). 

S. Shinoj, S. Panigrahi, and R. Visvanathan, Water absorption pattern and dimensional stability of oil palm fiber-linear low density polyethylene composites. J. Appl. Polym. Sci. 117, 1064-1075(2010). 

Gul R, Islam A, Yasin T, Mir S (2011) Flame-retardant synergism of sepiolite and magnesium hydroxide in a linear low-density polyethylene composite. J Appl Polym Sci 121 2772-2777... 

N. H. Kim, T. Kuila and J. H. Lee, Enhanced mechanical properties of a multiwall carbon nanotube attached pre-stitched graphene oxide filled linear low density polyethylene composite. /. Mater. Chem. A. 2, 2681-2689 (2014). 

A. S. Luyt, J. A. Molefi, and H. Krump, Thermal, mechanical and electrical properties of copper powder filled low-density and linear low-density polyethylene composites. Polym. Degrade. Stab. 91 (7),1629-1636 (2006). 

Compositional uniformity, of linear low density polyethylene, 20 204 Composition analysis, for plastics, 79 563—569... 

A polymeric composition for use in foam manufacture comprises a linear low density polyethylene and a resiliency modifier resin. The linear low density polyethylene is present in an amount of from about 1 to 90 weight percent of the polymeric composition and has a z-average molecular weight greater than about 700,000. The resiliency modifier resin is present in an amount of from 10 to about 99 weight percent of the polymeric composition and may be a low density polyethylene. 

This patent is a reissue (RE 34607). The composition described, capable of forming foams with excellent mechanical properties and heat resistance, is made of (a) 14-80 wt.% of a propylene-ethylene random copolymer having an ethylene content of 1.5-6 wt.%, (b) 10-60 wt.% of a propylene-ethylene random copolymer having an ethylene content of 0.2-1.0 wt.%, (c) 10-60 wt.% of a linear low-density polyethylene, and (d) 1-30 pbw, per 100 pbw of the above resin composition, of a foaming agent. JAPAN... 

Figure 1. Compositional dependence of the zero-shear viscosity for blends of a linear low density polyethylene (LLDPE) with (1) and (2) different LLDPE resins, and (3) with low density polyethylene, LDPE.

This prediction was found qualitatively valid for blends of low density polyethylene, LDPE, with linear low density polyethylene, LLDPE. At about 20 wt% of LDPE a sharp peak in the plot of a = d In T /d In Y (where Y = l/(f + 0.07) with f being the free volume fraction) vs. composition. This behavior was associated with the phase separation in the blends [Utracki and Schlund, 1987]. 

A novel organic (chitosan) and inorganic (tetraethyl orthosilicate) composite membrane has been prepared, which is pH sensitive and drug permeable [258]. The latter possibly involved in ionic interactions. By plasma source ion implantation technique, the adhesion between linear low-density polyethylene and chitosan could be improved [259]. Such bilayer films showed 10 times lower oxygen permeability, a property of use in food packaging applications. These multilayer films were easily recyclable. 

General Description The fundamental attribute of ExxonMobil Exceeds metallocene-catalyzed linear low density polyethylene (mEEDPE) is a consistent, uniform distribution of polymer molecules based on single-site catalysts. This uniformity eliminates molecular extremes (narrowing the molecular weight and composition distribution), resulting in a range of property improvements. 

Durmus, A., Woo, M., Kasgoz, A., and Macosko, C. W. 2008. Mechanical properties of linear low density polyethylene (LLDPE)/clay nanocomposites Estimation of aspect ratio and interfacial strength by composite models. Journal of Macromolecular Science, Part B Physics 47 608-619. 

F.M. Mirabella, E.A. Ford, Characterization of linear low-density polyethylene cross-fractionation according to copolymer composition and molecular weight. J. Polym. Sci. B Polym. Phys. 25(4), 777-790 (1987)... 

Zhou and co-workers [28] measured the electrical conductivity/resistivity of carbon black filled linear low-density polyethylene (LLDPE) and blends of LLDPE with ethylene-methylacrylate (EMA). The percolation threshold of the blended polymer composite was significantly lower than that of the LLDPE composite, although in an EMA composite the threshold is higher. This effect was due to preferential absorption of the carbon black into the LLDPE due to phase separation and immiscibility in low-density polyethylene (LDPE)/EMA blends. The viscosity of polymers in the blend... 

Shafiq M, Yasin T (2012) Effect of gamma irradiation on linear low density polyethylene/ magnesium hydroxide/sepiolite composite. Radiat Phys Chem 81 52-56... 

Blends of PCL with linear low-density polyethylene have been prepared and their rheological properties were investigated. Data demonstrated that in variations of In(viscosity) with composition of the blends experimental values fell below the weighted average values. A model was proposed to describe this negative deviation [153]. 

Previous studies on nanocomposites made with highly conductive nanoparticles and amorphous polymers have been reported (Jimenez and Jana, 2007 Mathur et al., 2008) such nanocomposites possessed a strain-to-failure of less than 5%. In a recent study (Vdlacorta et al., 2012), we have investigated the EM SE and electrical properties of heat-treated CNFs dispersed in a flexible linear low-density polyethylene (semiciystalhne) matrix. This chapter explores the effect of two other carbon-based modifiers on the EM SE of composites prepared by multiple melt-mixing routes with LLDPE for potential use in ductile/flexible EMC apphca-tions. Attention is also directed to the electrical and mechanical properties of such composites in relation with their electromagnetic shielding performance. 

Ling, Q. Sun, J. Zhao, Q. Zhou, Q. Microwave absorbing properties of linear low density polyethylene/ethylene-octene copolymer composites filled with short carbon fiber Mater. Sci. Eng., B 2009, 162, 162-166. 

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