High density polyethylene combustion

The principal polyolefins are low-density polyethylene (ldpe), high-density polyethylene (hope), linear low-density polyethylene (lldpe), polypropylene (PP), polyisobutylene (PIB), poly-1-butene (PB), copolymers of ethylene and propylene (EP), and proprietary copolymers of ethylene and alpha olefins. Since all these polymers are aliphatic hydrocarbons, the amorphous polymers are soluble in aliphatic hydrocarbon solvents with similar solubility parameters. Like other alkanes, they are resistant to attack by most ionic and most polar chemicals their usual reactions are limited to combustion, chemical oxidation, chlorination, nitration, and free-radical reactions. 

The block-copolyesterketones are synthesized [396] on the basis of dichloranhydride-1,1 -dichlor-2,2 -bis( -carboxyphenyl)ethylene and various dioxy-compounds with complex of worthy properties. It is possible to create, on the basis of obtained polymers, the constructive and film materials possessing lower combustibility and high insulating properties. Some synthesized materials are promising as modifiers of high-density polyethylene. 

The structural (fractal) analysis of coke residue formation at composites high density polyethylene/aluminum hydroxide combustion was performed. It has been shown that aluminiun hydroxide particles aggre tes formation results in such situation, when the indicated particles decomposition is realized in loose surface layers of aggregates, whereas densely-packed central regions form coke residue. 

High-density polyethylene is highly flammable, and it drips while combustion. Its flammability might be reduced through the introduction of chemicals called fire retardants. Fire safety requirements force the use of compounds or flame-retardant compounds that cause slow heat release, small amoimt of smoke as well as they reduce the... 

The continuing interest in changing the combustion characteristics of composites has focused attention on ATH (alumina trihydrate) filled high density polyethylene. Attempts to incorporate high loadings of ATH into HDPE normally leads to processing difficulties and degradation of composite properties. 

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