H-NMR study of interactions of dimethyl ester of 2,2,4,4-tetramethylglutaric acid with stereoregular poly(methyl methacrylates) in solution.

Autor: Spěváček, Jiří, Schneider, Bohdan, Mihailov, Marin
Zdroj: Polymer Bulletin; 1982, Vol. 8 Issue 2-4, p171-177, 7p
Abstrakt: Studies of integrated band intensities in high resolution (HR) H NMR spectra of the dimethyl ester of 2,2,4,4-tetra-methylglutaric acid (DMTMGA) in solutions containing stereo-regular poly(methyl methacrylate)(PMMA) have shown that a part of the DMTMGA molecules interact with PMMA. In this interaction DMTMGA behaves similarly as syndiotactic (s) PMMA. DMTMGA can link-up in self-aggregates of s-PMMA, and also replace s-PMMA in interaction with isotactic (i) PMMA forming an analog of the PMMA stereocomplex. An analogy of the conformational structure of DMTMGA and of the s-sequences in the aggregates of PMMA is discussed. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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