Investigation of γ-irradiated syndiotactic poly(2-methylheptyl methacrylate) using NMR spectroscopy
✍ Scribed by Limin Dong; David J. T. Hill; James H. O'Donnell; Peter J. Pomery; Ian M. Brereton
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 408 KB
- Volume
- 196
- Category
- Article
- ISSN
- 1022-1352
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Syndiotactic poly(2‐methylheptyl methacrylate) which was γ‐irradiated at room temperature to a dose of 1600 kGy was investigated by NMR spectroscopy. The ^1^H and ^13^C resonances for the macromolecular chain were assigned by using the 2D and the DEPT (distortionless enhancement by polarization transfer) technique. The spin‐echo modified 2D NMR pulse sequence was used to investigate the small molecules and new structures which were formed during γ‐irradiation. The radiation mechanisms for cleavage of the side chain from the main chain and formation of double bonds from both the main chain and the side chain have been formulated based upon the NMR analysis.