Die Abhängigkeit der Taktizität von der Polymerisationstemperatur und von Lösungsmitteln bei nach radikalischem Mechanismus hergestelltem Polyvinylacetat

Polyvinyl acetate (PVAc) was polymerized according to a radical reaction mechanism with AIBN as an initiator at temperatures between ?60°C and 200°C. Additionally, polymerizations were effected in nine different solvents. The tacticity of the polymers obtained was determined from the methyl resonances of the NMR spectra. The best spectra were obtained from a 3–5% (wt./vol.) polymer solution in deuterochloroform at 100 Mc/sec. It was found that the tacticity of radically prepared PVAc is independent of the polymerization temperature and that an ideal atactic product is always formed. Moreover, in all solution polymerizations examined no influence of the solvent on the tacticity was found.