Title

CHARACTERIZATION OF METHYL ALPHA-HYDROXYMETHYLACRYLATE ETHER CYCLOPOLYMER USING NUTATION NMR-SPECTROSCOPY

Document Type

Article

Publication Date

2-27-1991

Department

Polymers and High Performance Materials

Abstract

A cyclopolymer of the ether of methyl alpha-hydroxymethylacrylate (MHMA) was synthesized from a doubly C-13-labeled starting material. Nutation NMR spectroscopy was then used to determine whether the polymer contained five- or six-membered rings in the main chain generated by the cyclization step. Directly bonded C-13 spin pairs, which are detectable by the nutation NMR experiment, can be formed only in the case of a cyclopolymer containing five-membered rings. Experimental spectra indicate only isolated C-13 labels, suggesting that the cyclopolymer obtained under the current reaction conditions consists primarily of six-membered rings generated by strict head-to-tail addition of the methacrylate moieties.

Publication Title

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Volume

113

Issue

5

First Page

1550

Last Page

1553