Unusual assignments have been observed for the 1H-NMR of alkoxy groups in syndiotactic methyl methacrylate-methacrylic acid (MMA-MAA) copolymers and methyl methacrylate-diphenylmethyl methacrylate (MMA-DPMMA) copolymers. Thereby, the alkoxy groups --OCH3 and --OCH < show a degenerate pentad assignme
Influence of methacrylic acid dimerization on the configurational and compositional triad sequences in methacrylic acid-methyl methacrylate copolymers
β Scribed by G.S. Georgiev; I.G. Dakova
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 278 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0014-3057
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β¦ Synopsis
The influence of methacrylic acid (A) dimerization in toluene on its copolymerization with methyl meth.acrylate (B) was studied. It was established that as a result of this influence the dependence of the conAgurationa1 triad mole fraction on the monomer feed is non-linear, r, = 1.05 k 0.03, rs = 0.05 f 0.02 and the experimental values of the alternating ABA and BAB compositional triads are rather smaller than those calculated by the terminal model which does not take account of the dimer participatiou in the chain propagation.
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