Polyethylene terephthalate/ethylene isophthalate copolymer

Uglea et al. (32) fractionated polyethylene terephthalate-ethylene isophthalate copolymer with the coacervate extraction technique, that is, successive extractions of the precipitated polymer using a solvent/nonsolvent pair, with an increasing solvent amount in the next round of the extraction process. The fractioned samples were dissolved in phenol/TCE (3 2, wt/wt) at ambient, and the SEC was later run in TCE-nitrobenzene (95 5, vol/vol) at 100°C. Elevated temperature (lOOX) was used, probably to increase the solubility of the copolymers in the eluant. 

Polyethylene terephthalate -ethylene isophthalate copolymer Styragel columns T etrachloroethane/nitrobenzene (99.5 0.5) at 100°C Samples dissolved in phenol/tetrachloroeth ... 

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