𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The influence of solute-solvent interactions on the kinetics and stereospecificity of polymerization-the relevance of aromatic solvent shifts observed on the nmr spectrum of methyl methacrylate

✍ Scribed by P.E.M. Allen; B.O. Bateup

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
303 KB
Volume
9
Category
Article
ISSN
0014-3057

No coin nor oath required. For personal study only.

✦ Synopsis

The effect of certain aromatic compounds on the PMR spectrum of methyl methacrylate (MMA) was investigated. The magnitude of observed aromatic-induced shifts decreased in the order benzene >~ styrene > chlorobenzene ~ bromobenzene.

Assuming that the interaction arises from a stoichiometric 1 : 1 complex, equilibrium parameters for the MMA-benzene interaction have been estimated. AH 4-S.E. (AH) = --(8 4-4) kJ mol-t. These effects are likely to have a small influence on the kinetics of copolymerization with aromatic monomers and polymerization in aromatic solvent. The stereochemistry of the solute-solvent interactions suggests that MMA takes a cis-conformation in solution, which is relevant to the mechanism of stereoregular polymerizations of this monomer.

📜 SIMILAR VOLUMES

The influence of molecular interaction o
The influence of molecular interaction on polymerization—11: A study of the influence of the solvent on the tacticities of poly(2-naphthyl methacrylated) and poly(cumylphenyl methacrylate) obtained in various solvents
✍ C. Bratchkov; V. Sinigersky; L. Markova; H. Boudevska 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 279 KB

Polymerizations of 2-naphthyl methacrylate and 4(l-methylphenethyl)phenyl methacrylate (cumylphenyl methacrylate) have been carried out in solvents with different dielectric constants and donor numbers (DN). By means of ~H-NMR and fluorescence spectroscopy, the tacticities of the polymers were studi

On the termination reaction in the anion
On the termination reaction in the anionic polymerization of methyl methacrylate in polar solvents—I. Kinetic studies
✍ F.J. Gerner; H. Höcker; A.H.E. Müller; G.V. Schulz 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 515 KB

Al~traet--The kinetics of the termination reaction in the anionic polymerization of methyl methacrylate, using monofunctional initiators with sodium as the counterion in the presence of excess NaB(C6Hs) 4 have been studied. For monitoring the living-end concentration, a labelling technique was used.

Empirical treatment of solvent–solute in
Empirical treatment of solvent–solute interactions: medium effects on the electronic absorption spectrum of β-carotene
✍ T. Abe; J.-L. M. Abboud; F. Belio; E. Bosch; J. I. Garcia; J. A. Mayoral; R. Not 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 151 KB 👁 2 views

Solvent effects on the wavenumber of the maximum of the longest wavelength electronic absorption band of all-trans-b-carotene were determined in 34 solvents. Together with results from previous studies, a data set for 51 solvents, mostly non-hydrogen bond donors, was constructed. This information wa

Effect of LiClO4 and LiCl Additives on t
Effect of LiClO4 and LiCl Additives on the Kinetics of Anionic Polymerization of Methyl Methacrylate in Toluene-Tetrahydrofuran Mixed Solvent
✍ Mahua G. Dhara; Durairaj Baskaran; Swaminathan Sivaram 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 141 KB

## Abstract The kinetics of anionic polymerization of MMA has been studied at −78 °C in toluene‐THF (9:1 v/v) using 1,1′‐diphenylhexyl lithium as initiator in the presence of lithium perchlorate and lithium chloride as Lewis acid additives. The control of the polymerization is lost in the absence o