Stereoregularity of fractionally crystallized poly(propylene oxide) samples by 13C-NMR spectroscopy
✍ Scribed by N. Uğur; K. Alyürük
- Book ID
- 105337226
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 442 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0887-624X
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📜 SIMILAR VOLUMES
Several procedures for synthesis of stereoregular poly(methacrylic acid) have been examined and the polymer characterized by (I~C)NMR. Using d 6 DMSO as solvent for spectroscopy gives better spectra than those previously obtained using aqueous solutions and stereoehemical splittings can be resolved
The oxidative thermal degradation of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) at 150°C in air was studied. The weight loss was determined, and the structure of the residual polymer investigated using NMR. In PEO, the only significant structural changes were the formation of formate
## SYNOPSIS '.'C-nmr measurements are reported for samples of poly (L-lysine) both static and spinning a t the magic angle in the @-sheet form as a function of water content. T h e addition of water decreases the side-chain line widths considerably. Measurements of the cross-polarization time cons