Ethylene octane copolymer

Keawwattana, W. (2002). Phase behaviour, crystallization and morphological development in blends of polypropylene (PP) isomers and poly(ethylene-octane) copolymer. Phd Thesis. University of Akron. 

A. (2012) Characterization of non-covalently, non-specifically functionalized multi-wall carbon nanotubes and their melt compounded composites with an ethylene—octane copolymer. Compos. Sci. Technol., 73, 27—33. 

Bagheri-Kazemabad S, Daniel FD, Chen Y, Geever LM, Khavandi A, Bagheri R, et al. Morphology, rheology and mechanical properties of polypropylene/ethylene-octane copolymer/clay nanocomposites effects of the compatibilizer. Compos SciTechnol 2012 72 1697-704. 

Highly filled polymeric materials exhibit complex rheological properties. In this study the rheological characteristics of highly filled suspension based on ethylene octane copolymer binder and Dechlorane filler were studied. Steady shear and thixotropic behaviors are discussed. 

In this section, we discuss the occurrence of side groups in ethylene copolymers ranging from ethylene-propylene to ethylene-octane. In the case of ethylene-propylene copolymers it is possible by C-NMR to determine the methyl side-groups due to propylene units. 

Figure 5.122. Height images of ethylene octane (EO) copolymer dispersions, dried on glass slides at room temperature, were heated and imaged to show the effect of particle size on film formation temperature using an AFM with a miniature hot stage. (See color insert.) (From Li et al. [586] unpublished.)...

Liu, Z., Chen, S., Zhang, J. Photodegradation of ethylene-octene copolymers with different octane contents. Polym. Degtad. Stab. 96, 1961-1972 (2011)... 

Chemically, LLDPE can be described as linear polyethylene copolymers with alpha-olefin comonomers in the ethylene chain. They are produced primarily at low pressures and temperatures by the copolymerization of ethylene with various alpha-olefins such as butene, hexane, octane, etc., in the presence of suitable catalysts. Either gas-phase fluidized-bed reactors or liquid-phase solution-process reactors are used. (In contrast, LDPE is produced at very high pressures and temperatures either in autoclaves or tubular reactors.)... 

There are reports that ethylene and 1-octane have been copolymerized using a similar catalyst, and that the physical properties of this copolymer were compared with those of a nanocomposite fabricated using the dry-compound method [41]. A case is also reported in which polyethylene was subjected to in-situ polymerization. 

A conceptually similar approach was used by Muhlbach and Schulz [96] to prepare a styrene and l-azabicyclo[4.2.0]octane block copolymer. By end-capping living PSt with ethylene oxide, and subsequent reaction with bromoacetyl bromide, a polymer with bromoacetyl groups was obtained which, together with AgCl04, acted as a macroinitiator for a living polymerization of the cyclic monomer (Scheme 11.26). Very little homopolymer was formed, however. Two distinct glass transition temperatures, at 10 and 94 °C, were observed with the block copolymer that corresponded to the poly(l-azabicyclo[4.2.0]octane) and PSt sequences, respectively, and indicated that the blocks were incompatible and phase-separated. 

Figures 4.2 to 4.6 show NMR spectra of ethylene copolymers with propylene, butene-1, hexane-1, octane-1 and 4-methyl pentene-1. These spectra show chemical shift assignment of T values of the resonances of the copolymers. The molar composition of these copolymers could be determined with a relative precision at about 6% and pm value measurements at 10 ppm and 50 ppm.

The NMR spectroscopy has also been applied to the analysis of copolymers of ethylene with butane-1, hexane-1, octane-1 and 4-methyl pentene-1 [27]. Cheng [38] and Fisch and Dannenberg [39] have also discussed the application of C-NMR to the measurement of ethylene - butane-1 copolymers. They analysed copolymers containing up to 11% bound to propylene. 

Isotactic and syndiotactic polymers can crystallize, while atactic polymers cannot. Polymers other than polypropylene that have tacticity include polystyrene, polyfvinyl chloride), and poly(methyl methacrylate). Thus there are crystalline and non-crystalline forms of these polymers. By use of a copolymer, the number of side groups, and thus the crystallinity can be precisely controlled. An important example is the copolymerization of ethylene and a higher alpha-olefin, such as butene or octane, to make linear low-density polyethylene (LLDPE), in which the crystallinity is governed by the fraction of comonomer incorporated into the chain. Tacticity can affect important physical properties such as the intrinsic viscosity and thus must be taken into accoimt in characterization methods such as gel permeation chromatography. 

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