Polyolefins compounds

Alkyl derivatives of [6]radialene (4) were the first members of this class of polyolefinic compounds ever to be reported (see below). 

The addition of very small amounts of fine carbon fibers73 or polyacrylonitrile fibers74 can reduce the level of inorganic hydroxide required to achieve UL94 V-0 flammability ratings in polyolefin compounds. These secondary additives are thought to function as char promoters. 

Namike,Y., Kato, Y., Kitano, Y., Kuriso, H., and Yokata, Y., Flame retardant polyolefin compound having low smoking and toxicity, U.S. Patent No. 5,654,356, August 5, 1997. 

FIGURE 26.4 Probability for flame spread versus heat release capacity of compounds. (Cogen, J.M. et al., Correlations between pyrolysis combustion flow calorimetry and conventional flammability tests with halogen free flame retardant polyolefin compounds, Fire Mater., 2009, 33, 33-50.)... 

Among insect pheromones a great number of mono- and polyolefinic compounds are found a lot of them can be obtained by the Wittig reaction. Especially the syntheses of sex attractants of female butterflies and moths, which are mostly mono- and bisunsaturated alcohols, acetates or aldehydes 168), offer a broad field for the application of the Wittig reaction and have stimulated the development of many new stereoselective variants. Thus, the methods of salt-free Wittig reactions (Chapter 2) like the sodium amide method11 31 32, the silazide technique33, potassium in HMPA 34,35 or the use of dipolar aprotic solvents like dimethyl formamide 169>, dimethyl sulfoxide 51,170) or hexamethylphosphoric triamide 51 170) were often used. 

Aliphatic and Cycloaliphatic Resins. Aliphatic and cycloaliphatic epoxy resins have been produced from the epoxidation of olefinic compounds. The epoxidation process involves the use of an olefinic or polyolefinic compound and a peracid (e.g., peracetic acid) or other... 

In general, an incompletely coordinated (coordinately unsaturated) metal atom in an M(CO) group will combine with a polyolefinic compound so as to complete its normal coordination requirement. It does so on the basis that each double bond is, formally, the equivalent of one 2-electron donor. Several categories may be distinguished among the many compounds of this type ... 

PP and PE are the two most-compounded polymers at North American compounders. About 75% of all polymers supplied to compounders in North America are POs (with PP itself making up over half of the total). "Technical polyolefin" compounding is increasingly being focused on by compounders who specialize in adding fillers, reinforcements, and modifiers to materials for automotive and appliance use [2-14, 2-15, 2-17]. 

Neri C, et al. Stabilization of polyolefin compounds for wire cable applications. Wire Cable, conference proceedings (paper no. 41). American Chemical Society 2001. 

Isarov A, et al. Non-halogen flame retardant polyolefin compounds via synergistic blends of metal hydroxides and mineral fillers. International Polyolefins, conference proceedings. Society of Plastics Engineers 2007. 

BYK-P 4200 Stripping Agent to Reduce Odor and VOC Emissions in Polyolefin Compounds, supplier data sheet (09/2007). BYK-Chemie GmbH. 

This book follows the lifetime of polyolefin compounds and materials from their historical and economical input, synthesis and processing, over applications, to recycling and oxo-degradation. 

M. Al-Ali AIMa adeed and I. Kmpa (eds.). Polyolefin Compounds and Materials, Sptingta- Series on Polymer and Composite Materials,... 

PPG-4 diacrylate Stearyl acrylate flexibilizer, photoresist coatings Polyvinyl methyl ether flexibilizer, polyolefin compounds Polyethylene, very low-density flexibilizer, powder coatings Bis (4-vinyl oxy butyl) hexanediyibiscarbamate flexibilizer, PU Polyether polyol flexibilizer, vinyl ether coatings Bis (4-vinyl oxy butyl) hexanediyibiscarbamate filexibilizer, skin care Dimethyl sulfone flocculant... 

Sigworth has recently described the use of MA-g-PP and M A-g-PE in natural fiber-filled polyolefin compounds [43]. The additives were found to be effective on a wide range of natural products, including wood flour, and he reported significant improvements in the following properties with additive levels of about 5% based on the natural fiber increased tensile, flexural and impact strengths reduced room... 

Silica is one of the most widely used inorganic additives in polyolefin compounds. The role it plays is constrained by its surface properties and. when stabilizers are present, they may be chemisorbed or physisorbed to the silica surface, restricting their mobility and reducing their role of inhibiting degradation reactions. Additives grafted to polymers have often been found to be less effective than their... 

Especially suited for polycarbonates, polyesters, and other polymers usually processed at high temperatures. In polyolefins, it has a low volatility at high temperatures and high resistance to thermal degradation for polyolefin compounding and mold ing applications. It is especially suitable for applications of high surface area, such as films and fibers. 

Whereas isotropic carbon nanomaterials such as fullerenes offer limited prospects for polyolefin compounds, both carbon nanotubes and graphene are highly attractive with respect to their ultrahigh aspect ratio, extraordinary stiffness, as reflected by a Young s modulus of around 1 TPa, and their extremely fast... 

Cyclopentenone Polyolefinic Compounds Jasmone.—Several new routes to c/j-jasmone (175), an important constituent of the essential oil of jasmine, have been described. Ellison and Woessner have outlined a convenient route to the 1,4-diketone (174), which readily... 

BS 2782 (1975) Methods of testing plastics chemical properties determination of antioxidants in polyolefin compounds by a spectropho-tometric method. 

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