Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 40, Issue 16, Pages 1784-1793Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/polb.10237
Keywords
nylon-46; equilibrium melting enthalpy; equilibrium melting temperature; crystallization kinetics; activation energy; differential scanning calorimetry (DSC); density
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Isothermal and nonisothermal crystallization kinetics of nylon-46 were investigated with differential scanning calorimetry. The equilibrium melting enthalpy and the equilibrium melting temperature of nylon-46 were determined to be 155.58 J/g and 307.10 degreesC, respectively. The isothermal crystallization process was described by the Avrami equation. The lateral surface free energy and the end surface free energy of nylon-46 were calculated to be 8.28 and 138.54 erg/cm(2), respectively. The work of chain folding was determined to be 7.12 kcal/mol. The activation energies were determined to be 568.25 and 337.80 kJ/mol for isothermal and nonisothermal crystallization, respectively. A convenient method was applied to describe the nonisothermal crystallization kinetics of nylon-46 by a combination of the Avrami and Ozawa equations. (C) 2002 Wiley Periodicals, Inc.
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