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Thermodynamic properties and crystallization behavior of poly( p ‐phenylene succinate)
Author(s) -
Youk Ji Ho,
Ha Wan Shik,
Jo Won Ho,
Lee Seung Wook
Publication year - 1999
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/(sici)1097-4628(19990801)73:5<801::aid-app20>3.0.co;2-o
Subject(s) - materials science , crystallization , differential scanning calorimetry , supercooling , fusion , phenylene , isothermal process , thermodynamics , composite material , polymer , linguistics , philosophy , physics
The equilibrium thermodynamic properties and crystallization behavior of poly( p ‐phenylene succinate) (PPSc) were examined using differential scanning calorimetry (DSC) and a wide‐angle X‐ray diffractometer. When PPSc quenched into liquid nitrogen, the PPSc still showed 60 J/g of the heat of fusion, indicating that PPSc crystallizes too fast to be quenched to a glassy state. The equilibrium heat of fusion (Δ H °) of PPSc and its equilibrium entropy of fusion (Δ S °) were estimated to be 28 and 48 J/mol K, respectively. The effect of the molecular weight and undercooling on PPSc crystallization was analyzed by the Avrami expression. The crystallization rate of PPSc was highest at about 276°C, regardless of molecular weight when the sample was isothermally crystallized. This temperature was higher than that of poly(ethylene terephthalate) (PET) by 100°C. The crystallization rate was highest when the number average molecular weight of PPSc was about 20,000 g/mol. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 801–806, 1999