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Nonisothermal crystallization kinetics of poly(ethylene terephthalate) and poly(methyl methacrylate) blends
Author(s) -
Bishara Ahmed,
Shaban Habib I.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.22440
Subject(s) - materials science , crystallization , differential scanning calorimetry , poly(methyl methacrylate) , scanning electron microscope , methyl methacrylate , thermogravimetric analysis , polymer chemistry , kinetics , optical microscope , ethylene , polymer blend , polymer , avrami equation , chemical engineering , composite material , crystallization of polymers , polymerization , copolymer , chemistry , thermodynamics , organic chemistry , physics , quantum mechanics , engineering , catalysis
The nonisothermal crystallization kinetics of poly(ethylene terephthalate) (PET) and poly(methyl methacrylate) (PMMA) blends were studied. Four compositions of the blends [PET 25/PMMA 75, PET 50/PMMA 50, PET 75/PMMA 25, and PET 90/PMMA 10 (w/w)] were melt‐blended for 1 h in a batch reactor at 275°C. Crystallization peaks of virgin PET and the four blends were obtained at cooling rates of 1°C, 2.5°C, 5°C, 10°C, 20°C, and 30°C/min, using a differential scanning calorimeter (DSC). A modified Avrami equation was used to analyze the nonisothermal data obtained. The Avrami parameters n , which denotes the nature of the crystal growth, and Z t , which represents the rate of crystallization, were evaluated for the four blends. The crystallization half‐life ( t ½ ) and maximum crystallization ( t max ) times also were evaluated. The four blends and virgin polymers were characterized using a thermogravimetric analyzer (TGA), a wide‐angle X‐ray diffraction unit (WAXD), and a scanning electron microscope (SEM). © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 3565–3571, 2006