Morphological changes of poly(ethylene terephthalate-co-isophthalate) during solid state polymerization
Stamatina N. Vouyiouka
Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, Zographou, Athens 15780, Greece
Search for more papers by this authorViviane Filgueiras
Programa de Engenharia Química/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária-CP: 68502, 21941-972 Rio de Janeiro, RJ, Brazil
Search for more papers by this authorCorresponding Author
Constantine D. Papaspyrides
Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, Zographou, Athens 15780, Greece
Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, Zographou, Athens 15780, Greece===Search for more papers by this authorEnrique L. Lima
Programa de Engenharia Química/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária-CP: 68502, 21941-972 Rio de Janeiro, RJ, Brazil
Search for more papers by this authorJose Carlos Pinto
Programa de Engenharia Química/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária-CP: 68502, 21941-972 Rio de Janeiro, RJ, Brazil
Search for more papers by this authorStamatina N. Vouyiouka
Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, Zographou, Athens 15780, Greece
Search for more papers by this authorViviane Filgueiras
Programa de Engenharia Química/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária-CP: 68502, 21941-972 Rio de Janeiro, RJ, Brazil
Search for more papers by this authorCorresponding Author
Constantine D. Papaspyrides
Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, Zographou, Athens 15780, Greece
Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, Zographou, Athens 15780, Greece===Search for more papers by this authorEnrique L. Lima
Programa de Engenharia Química/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária-CP: 68502, 21941-972 Rio de Janeiro, RJ, Brazil
Search for more papers by this authorJose Carlos Pinto
Programa de Engenharia Química/COPPE, Universidade Federal do Rio de Janeiro, Cidade Universitária-CP: 68502, 21941-972 Rio de Janeiro, RJ, Brazil
Search for more papers by this authorAbstract
Poly(ethylene terephthalate-co-isophthalate) (PETI) prepolymer was submitted to solid state polymerization (SSP) at 184–230°C in a fixed bed reactor, to study the evolution of morphological changes during the process. Short reaction times were selected to investigate crystallization phenomena during nonisothermal (heating) and isothermal SSP phases. More specifically, multiple PETI melting behavior was observed and attributed to secondary crystallization, the rate of which increased significantly with SSP temperature. Reaction time was also found to exert a positive effect on solid-phase perfection of secondary crystals, leading at each temperature to melting points close to the value of bottle-grade poly(ethylene terephthalate). Finally, the mass fraction crystallinity of the SSP grades was found to comply with the crystal morphology encountered. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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