Polyethylene naphthalate structure

Polyethylene naphthalate is a condensation polymer of ethylene glycol and naphthalate dicarboxylate (NDC), with the structure ... 

Fang P, Wegener M, Wirges W, Gerhard R (2007) Cellular polyethylene-naphthalate ferroelectrets foaming in superciitieal carbon dioxide, structural and electrical preparation, and resulting piezoelectricity. Appl Phys Lett 90 192908... 

The average diameter of PANI CSA-PLA nanofibers determined from the SEM images was about 200 nm, with a standard deviation of about 100 nm and length up to several hundred micrometers (Fig. 5.10). The as-electrospun PANI CSA-PLA nanofibers were stacked and bonded with the substrate firmly, resulting in an interconnected nanofibrous network with a thickness of about 2 mm. This network structure was in favor of the infiltration of electrolyte and further promotes the electrocatalytic activity for the reduction of 13 ions. The nanofibers were directly deposited on rigid fluorine-doped tin oxide (FTO) and also flexible indium tin oxide-coated polyethylene naphthalate (PEN) substrates to obtain the counter electrodes, which is close to that of sputtered Pt-based DSSCs. 

Figure 19 (a, b) Waveguide architectures and (c) the chemical structure of the polymer and the analytes. SOP, semiconducting organic polymers ASE, amplified spontaneous emission DFB, distributed feedback ITO, Indium tin oxide LUMO, lowest unoccupied molecular orbital HOMO, highest occupied molecular orbital DAG, diacylglycerol Al, Aluminium IL, insertion loss PET, Polyethylene terephthalate PEN, Polyethylene naphthalate. Reproduced with permission from Rose, A. Zhu, Z. G. etal. Nature 200B, 434 (7035), 876-879. ... 

Poly(ethylene naphthalate) (PEN), 20, 21, 25. See also PEN entries structure and properties of, 44-46 Poly(ethylene oxide) (PEO), 359 Polyethylenes... 

The substrates or support coated on include paper and paper board, cellophane, polyCethylene terephthalate), poly(ethylene naphthalate), polyethylene, polypropylene, polystyrene, polyCvinyl chloride), polyCvinyl fluoride), poly(vinylidene fluoride), polyimide, metal foils, woven and nonwoven fabrics, fibers, and metal coils. The surfaces of these supports can be impervious as in plastic films, or there may be a pore structure such as in paper. Primer coatings... 

Polyesters containing ethylene moities, namely polyethylene-biphenylate (PEBB) and naphthalate (EN) copolsrmers, were analyzed by Wendling and co-workers (401) in an effort to comprehend their crystal/amorphous structures. They found that minority repeat imits were excluded from the crystalline phase of the majority comonomer when the concentrations of the two are very dissimilar, whereas the two comonomers are able to cocrystalUze by segregation when their compositions are more nearly equal. 

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