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Non‐isothermal cold crystallization kinetics and morphology of PET + SAN blends
Author(s) -
Wellen Renate M. R.,
Rabello Marcelo S.
Publication year - 2009
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.31620
Subject(s) - differential scanning calorimetry , crystallinity , crystallization , materials science , isothermal process , scanning electron microscope , chemical engineering , polymer chemistry , kinetics , composite material , thermodynamics , physics , quantum mechanics , engineering
The influence of small amounts of poly(styrene‐ co ‐acrylonitrile) (SAN) on the non‐isothermal cold crystallization behavior and morphology of poly(ethylene terephthalate) (PET) was investigated by dynamic‐mechanical thermal analysis, differential scanning calorimetry (DSC), optical microscopy, and scanning electron microscopy. The results indicated that SAN had a limited solubility in the amorphous phase of PET although in a larger scale a phase separation occurred. The addition of 1 wt % of SAN promoted a significant reduction in the crystallization rate of PET, acting as an antinucleating agent. The kinetics parameters were determined applying both the Ozawa and Mo approaches. Mo's model described the crystallization evolution better than the Ozawa one because it is possible to analyze the kinetic parameters in similar range of crystallinity degrees. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010