Title page for ETD etd-01202010-020257

Type of Document Master's Thesis
Author Lim, Christina Go
URN etd-01202010-020257
Title Synthesis and characterization of poly(oxazoline) rotaxanes and literature review on separation, detection and identification of cyclic oligomers in poly(ethylene terephthalate) and poly(ε-caprolactam)
Degree Master of Science
Department Chemistry
Advisory Committee
Advisor Name Title
Gibson, Harry W. Committee Chair
Marand, Herv L. Committee Member
Merola, Joseph S. Committee Member
  • Polymers
Date of Defense 1991-07-02
Availability restricted

Several methods have been developed to determine the cyclic oligomer content in PET. Isolation procedures can be classified as those involving extraction, such as with solvents like chloroform, dioxane, and xylene, and those involving dissolution followed by precipitation in solvents like dimethylformamide and 1-methylnaphthalene. The amount of cyclic oligomer obtained is largely dependent upon the method used, as well as the type, drawing, and thermal history of the PET used.Various methods for separation of cyclic oligomers have also been developed using GPC and thin-layer chromatography.

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