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Reactive blending of commercial PET and PC with freshly added catalysts |
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| Authors: | Vladimir N lgnatov Claudio Carraro Vittorio Tartari Roberto Pippa Francesco Pilati Corrado Berti Maurizio Toselli Maurizio Fiorini |
| Affiliation: | Consorzio lnteruniversitario 'La Chimica per l'Ambiente', Ca'Foscari, Dorsoduro, 3246, Venezia, Italy EniChem, Centro Ricerche, via della Chimica 5, 30175, Porto Marghera (VE), Italy Dipartimento di Chimica, University di Modena, via Campi 183, 41100, Modena, Italy Dipartimento di Chimica Applicata e Scienza dei Materiali, University di Bologna, viale Risorgimento, 2, 40136, Bologna, Italy Dipartimento di Discipline Economico -Aziendali, University di Bologna, Piazza Scaravi li 2, 40126, Bologna, Italy |
| Abstract: | Reactive blending of commercial poly(ethylene terephthalate) (PET) and bisphenol A polycarbonate (PC), with catalysts added in the form of powder dispersed on the polymers just before melt mixing, was performed in a Brabender Plasticord 2000 apparatus at 275°C. Catalytic activity of the catalysts freshly added to polymers was found to be much higher as compared with that of the residues of the same type of catalysts remaining in PET after its synthesis. Furthermore, the catalytic activity appeared to be strongly dependent on the structure of the ligand that influences the catalyst solubility in the polymer melt. N.m.r. spectroscopy, selective degradation of PC fragments, solubility tests in methylene chloride and d.s.c. measurements made it possible to range the catalysts studied according to their catalytic activity. |
| Keywords: | poly(ethylene terephthalate) bisphenol A polycarbonate reactive blending |
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