Ethylene oxalate

EBB Cyclic ethylene benzene-boronate HEF 2-Hydroxy ethyl formate HE A 2-Hydroxyethyl acetate EC Ethylene carbonate PCL Phenyl Cellosolve EO Ethylene oxide CEO Cyclic ethylene oxalate... 

The reaction mechanism with phenyl oxalate is shown in Reaction 8. The reaction products, phenol, /Miydroxyethyl formate and cyclic ethylene oxalate, are more diffusible through the PET polycondensation system than is ethylene glycol. 

Poly(vinyl dimethylbenzylsilane) Poly(ethylene oxalate)... 

A.Alksnis and Dz.Deme, Investigations on equilibrium of poly-(ethylene oxalate) and 1,4-dioxane-2,3-dione, J.Polym.Sci., Polym.Chem.Ed. 17 2701 (1979). 

With the exception of poly (ethylene oxalate) [poly(ethylene glycol oxalate)], saturated aliphatic polyesters have a relatively low melting point because of the low energy barrier to rotation (see Section 4.2). For example, poly(ethylene adipate) melts at 54°C. 

Homopolyesters Prepared via Polycondensation.— The synthesis and degradation of polyester oxalates and the formation of poly(ethylene oxalate) by melt polymerization of oxalic acid and ethylene glycol have been reviewed. ... 

In chemical degumming straw is exposed to the action of chemicals, such as ethylene, oxalic acid, sulfuric acid, sodium hydroxide, acid and sodium carbonate, oxygenated water, soda, sodium sulfite, etc. 

Poly(ethylene oxalate) (11) differs from the above polymers by breaking down by homolysis at the oxalate linkage in the polymer chain, since in addition to 49% of ethylene oxalate (15) and 30% of oligomer by weight, a variety of other volatile products are produced from the lowest degradation temperatures and not only at higher temperatures as in the case of polyglycollide and polylactide. All the observed products are satisfactorily explained by the free radical mechanism shown in Scheme 31 ... 

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