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Sequences distribution of poly(ethylene terephthalate‐isophthalate) copolymers: Experimental TREF study and numerical simulation
Author(s) -
Lodefier Philippe,
Daoust Daniel,
Jonas Alain M.,
Legras Roger
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991480107
Subject(s) - copolyester , materials science , fractionation , copolymer , terephthalic acid , ethylene , polymer , polymer chemistry , elution , chemical engineering , composite material , chromatography , chemistry , polyester , organic chemistry , catalysis , engineering
The fractionation of a statistical copolyester made of poly(ethylene terephthalate‐ isophthalate) has been performed using Temperature Rising Elution Fractionation (TREF). TREF fractions were analyzed by size exclusion chromatography, thermal analysis, 1 H‐nuclear magnetic resonance and small angle X‐Ray diffractometry. Results show that the fractions exhibit both interchain and intrachain defect distribution. As the intrachain defect distribution can not be determined by experimental techniques, a computer simulation based on the determination of terephthalic sequences length in a virtual polymeric distribution was performed. The simulated chains were constructed using a stochastic process. The analysis of the results obtained on the distribution of the simulated sequences in the polymer correlates quantitatively well between the new fractionation mechanism proposed for copolyesters and the experimental results.