Polymérisation et copolymérisation cationiques des methylindenes

✍ Scribed by Maréchal, Ernest

• Publisher: Wiley (John Wiley & Sons)
• Year: 1970
• Tongue: English
• Weight: 647 KB
• Volume: 8
• Category: Article
• ISSN: 0449-296X
• DOI: 10.1002/pol.1970.150081013

✦ Synopsis

Abstract

A study of cationic polymerization and copolymerization of methylindenes has been carried out by experimental methods and by means of quantic chemistry. The study showed a great variation among initiators in efficiency for the various monomers. The study of the effect of temperature on polymerization was carried out for dimethyl‐5,7‐indene. Polymerization enthalpies and reactivity ratios were determined; the values that were obtained allowed a classification of methylindenes with regard to their reactivity toward a single cation. Total electron densities, free valences, and mobile bond orders, frontier electron densities, and superdelocalizabilities on position 1 and 2 were calculated for all methylindenes. In determining location energies of the electronic double bond in position 2 and the stabilization energies at the time of the attack by a cation, a theoretical classification of the monomers with respect to their reactivity in cationic polymerization was obtained. The agreement between calculation and experimental results is shown to be satisfactory.