Polyfethylene-2,6-naphthalate

Depolymerization processes have been proposed for polyfbutyleiie terephtha-late) by the glycolysis of PBT with 1,4-butaiiediol and a titanium catalyst [65]. Methanolysis of polyfethylene naphthalate) to dimethyl iiaphthalate and ethylene glycol has also been proposed [66, 67], but not implemented. The lack of commercial depolymerization of PEN is probably due not to technical limitations, but to insufficient supphes of PEN polymer feedstock to meet the minimum quantities needed for economical operations. 

High performance polymers, such as poly(ether-ether ketone), PEEK, as well as new resins, still coming on stream, such as polyfethylene naphthalate), syndiotactic polystyrene, and cyclo-olefinic copolymers, are offering further challenges to impact modification. 

Kim, J. Y. and S. H. Kim. 2006. Influence of multiwall carbon nanotube on physical properties of polyfethylene 2,6-naphthalate) nanocomposites. Journal of Polymer Science Part B Polymer Physics 44 (7) (April 1) 1062-1071. doi 10.1002/polb.20728. http //doi.wiley. com/10.1002/polb.20728. 

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