Accession Number : ADA185427
Title : High-Molecular Compounds (Selected Articles).
Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
PDF Url : ADA185427
Report Date : 04 Sep 1987
Pagination or Media Count : 17
Abstract : During the study of anionic polymerization of methylmethacrylate (MMA) in solution of toluene on p-C4H9Li in presence of syndiotactic polymethylmethcrylate (PMMA -polymethyl methacrylate) we discovered new stereochemical effects. As is known, with anionic polymerization of MMA in solution of toluene is formed isotactic PMMA of following configuration composition: I=76, H=15, S=9%. The additions of the preliminarily obtained isotactic samples of PMMA do not have an effect on the structure of newly forming isotactic PMMA under the same conditions of polymerization. On the contrary, the additive of syndiotactic PMMA (I=2,6, H: = 32,4, S=65%), capable of forming stero-complex with isotactic PMMA, leads to a substantial changes in the polymerization and structure of the generatrix of polymer.
Descriptors : *POLYMETHYL METHACRYLATE, POLYMERIZATION, RUSSIAN LANGUAGE, TRANSLATIONS
Subject Categories : Polymer Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE