Poly(Alkyl alpha-Chloroacrylates). IV. Tacticity Analysis from 300 MHz Proton Magnetic Resonance Spectra.pdfJournal of Polymer Science: Polymer Chemistry Edition (1975)
300 MHz proton magnetic resonance spectroscopy was applied to the determination of triad structures of three poly(alkyl a-chloroacrylates) of widely varying stereoregularities. Assignments and quantitative analyses were made for all of the tetrad peaks in the backbone methylene resonance of poly(methyl a-chloroacrylate), poly(ethyl a-chloroacrylate), and poly(isopropyl achloroacrylate). In addition the methyl singlet peaks of poly(methyl a-chloroacrylate), the methyl triplet peaks of poly(ethyl a-chloroacrylate) which had not been amenable previously to resolution at 220 MHz, and the methyl doublet peaks of poly(isopropyl a-chloroacrylate) were resolved, and the triad values which were obtained from these pendant ester group resonances compared favorably with triad values calculated from experimental tetrad values. As a demonstration of the internal agreement of the triad and tetrad peaks assignments, statistical calculations of the stereochemical structures of the atactic and syndiotactic polymers were generally described well or to a first approximation by random selection statistics (Bernoullian) while the stereochemical statistics of the moderately to highly isotactic polymers were consistent with a nonrandom statistical process (first-order Markovian), as expected.
- Poly(Alkyl alpha-Chloroacrylates),
- 300 MHz,
- Proton Magnetic,
- Resonance Spectra
Citation InformationWilliam MacKnight, G. R. Dever, F. E. Karasz and R. W. Lenz. "Poly(Alkyl alpha-Chloroacrylates). IV. Tacticity Analysis from 300 MHz Proton Magnetic Resonance Spectra.pdf" Journal of Polymer Science: Polymer Chemistry Edition Vol. 13 (1975) p. 1803 - 1818
Available at: http://works.bepress.com/william_macknight/45/