Determination of poly(ethylene terephthalate) oligomers in refrigeration oils by adsorption column chromatography-gel permeation chromatography

1979 ◽  
Vol 51 (14) ◽  
pp. 2398-2400 ◽  
Author(s):  
Satoru. Shiono
Keyword(s):  
Column Chromatography ◽  
Ethylene Terephthalate ◽  
Gel Permeation Chromatography ◽  
Adsorption Column ◽  
Poly Ethylene Terephthalate ◽  
Gel Permeation ◽  
Poly Ethylene

Supercritical fluid extraction and chromatography for the determination of oligomers in poly(ethylene terephthalate) films

1991 ◽  
Vol 63 (20) ◽  
pp. 2371-2377 ◽  
Author(s):  
Keith D. Bartle ◽  
Terry. Boddington ◽  
Anthony A. Clifford ◽  
Nicholas J. Cotton ◽  
Christopher J. Dowle
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Ethylene Terephthalate ◽  
Fluid Extraction ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Determination of local mechanical stresses in dyed poly(ethylene terephthalate) by IR spectroscopy

1979 ◽  
Vol 30 (5) ◽  
pp. 686-688
Author(s):  
D. Saidov ◽  
Kh. Khabibulloev ◽  
R. M. Marupov ◽  
V. I. Dasturi ◽  
M. S. Umarova
Keyword(s):  
Ir Spectroscopy ◽  
Ethylene Terephthalate ◽  
Mechanical Stresses ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

scholarly journals Determination of the degree of randomness in condensation copolymers containing both symmetrical and unsymmetrical monomer units: a theoretical study

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Martine Tessier ◽  
Alain Fradet
Keyword(s):  
Nmr Spectroscopy ◽  
Ethylene Terephthalate ◽  
Functional Group ◽  
Theoretical Study ◽  
Rational Functions ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Average Block

Abstract Expressions for the degree of randomness, B, and for the number- and weight-average block lengths of condensation copolymers containing both symmetrical (AA + BB) and unsymmetrical (AB) monomer units are established through an approach based on functional group probabilities. Several parameters introduced in literature to characterize randomness in AA + BB condensation copolymers are also calculated using this approach and compared to B, showing that they are simple linear or rational functions of B. A method for calculating functional group probabilities from the dyad and triad number-fractions determined by NMR spectroscopy is described for poly(ethylene terephthalate)-poly(ε-caprolactone) copolyesters. This method obviously applies to any AA + BB + AB polycondensation and is easily generalizable to other types of condensation copolymers.

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