Title

Gel-State NMR Investigation of Crosslinked Poly(methyl methacrylate) Incorporating C-13 Labeled Ethylene Glycol Dimethacrylate

Document Type

Article

Publication Date

6-1-1999

Department

Polymers and High Performance Materials

Abstract

C-13 labeled ethylene glycol dimethacrylate (EGDMA) was used to form labeled crosslinked PMMA and model 13C labeled pendant double bond copolymers. Solution NMR was possible on solvent-swollen samples containing less than 0.5% by weight EGDMA. Spectra confirm significant amounts of singly reacted EGDMA in fully polymerized networks. Peaks arising from the two most likely stereochemical triads (syndi- and heterotactic) were identified but no evidence of cyclic species was observed. Labeled EGDMA allowed observation of the crosslink site at concentrations as low as 0.02 wt-% EGDMA.

Publication Title

Macromolecular Symposia

Volume

141

First Page

47

Last Page

55