Waxes molecular weight range

The behavior of the viscosity of chlorinated paraffins emphasizes the significance of the availability of n-paraffins in molecular weight ranges below that of wax. Lower viscosity results in improved handling and could be an advantage in plastisol applications. 

Molecular Weight Range of Pyrolysis Oils/Waxes... 

The size of the pores determines the molecular weight range of the compounds that can be separated. Size exclusion often is used to clean up an extracted solution. For example, it is used to remove the fats and waxes from the pesticide residues that are extracted from a food composite. 

The high polymerization temperatures (100°-130°C) used by Eber-hardt (6) produced useful polyethylene waxes in the 1000-3000 molecular-weight range, albeit in low yield (Table II). These waxes have a low melt viscosity and are promoted as coating compositions for paper products such as drinking cups and as components of floor polishes. 

Virtually all plants have hydrocarbons in the same molecular-weight range those of C29. C31, and C33 are essentially ubiquitous. The same is true for wax esters and other long-chain lipid constituents of plants. Although a small number of plants have been examined, there appears to be little variation that would serve to differentiate plant groups (Eglinton and Hamilton, 1963). 

C) as paraffin wax. This PE-p-MS copolymer consists of an average of 20-22 consecutive methylene units, which is in the molecular weight range of solid paraffin wax. 

The polyethylenes are produced by directly polymerizing ethylene at relatively low pressures and temperatures. The molecular weights range from about 500 to 1000, which corresponds to 35 to 70 carbon atoms. The molecular chains can be either linear or branched depending upon the catalyst and conditions used to make the product. They differ from the paraffin and microcrystalline waxes in end groups and catalyst residues. 

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