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, Hervé L. Committee Member Merola, Joseph S. Committee Member
Keywords	Polymers
Date of Defense	1991-07-02
Availability	restricted
Abstract 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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