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Crystallization behavior of P(EN-co-ET) copolyesters: Crystallization kinetics and morphology revealed by DSC, time-resolved SAXS analysis, and TEM
- Source :
- Journal of Polymer Science Part B: Polymer Physics. 43:805-816
- Publication Year :
- 2005
- Publisher :
- Wiley, 2005.
-
Abstract
- The crystallization kinetics and morphology of PEN/PET copolyesters were investigated using differential scanning calorimetry (DSC), time-resolved small-angle X-ray scattering (TR-SAXS), and transmission electron microscopy (TEM). The Avrami exponents obtained using DSC were approximately 3 for homo PEN and 4 for all the copolyesters. The 3-parameter Avrami model was successfully fitted to the invariants with respect to the time obtained from TR-SAXS, and the exponent values were similar to those obtained from DSC. Moreover, the Avrami rate constants obtained from TR-SAXS showed marked temperature-sensitive decreases in all samples, like those obtained from DSC. This indicates that not only could changes in morphological parameters be obtained from the analysis of TR-SAXS data but also crystallization kinetics. The changes in the morphological parameters determined from the SAXS data indicate that the minor components, dimethyl terephthalate (DMT) segments, are rejected into the amorphous phase during crystallization. In the TEM study, copolyesters crystallized at temperature above 240 °C grew into both the α- and β-form, although 240 °C is the optimum condition for the β-form crystal. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 805–816, 2005
- Subjects :
- Dimethyl terephthalate
Morphology (linguistics)
Materials science
Polymers and Plastics
Small-angle X-ray scattering
Kinetics
Analytical chemistry
Condensed Matter Physics
law.invention
Crystal
chemistry.chemical_compound
Differential scanning calorimetry
chemistry
Transmission electron microscopy
law
Polymer chemistry
Materials Chemistry
Physical and Theoretical Chemistry
Crystallization
Subjects
Details
- ISSN :
- 10990488 and 08876266
- Volume :
- 43
- Database :
- OpenAIRE
- Journal :
- Journal of Polymer Science Part B: Polymer Physics
- Accession number :
- edsair.doi...........021a2f52c7890d11b2530c7d736a2d1a