Poly(allyl methacrylate) (PAMA) and random copolymers of styrene (St) with allyl methacrylate (AMA) were prepared via atom transfer radical polymerization. For the homopolymerization of AMA, the maximum conversion depends on the reaction conditions and on the monomer/initiator ratio. For the copolymerization, AMA conversions of up to 90% were obtained while no cross-linking occurred. Kinetic studies of the homopolymerization revealed a controlled polymerization up to a certain conversion whereas at higher conversions, multimodal molecular weight distributions caused by branching reactions and cross-linking were observed. The copolymerization of AMA with St allowed a controlled reaction up to conversions higher than 90%. The copolymers obtained were soluble in standard organic solvents. In a subsequent reaction, these copolymers were cross-linked both thermally and photochemically using suitable initiators. Moreover, pendant double bonds were brominated quantitatively.

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and evaporative light scattering detector (ELSD). INTRODUCTION:

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ZUSAMMENFASSUNG:Es wird gezeigt, da8 hydroxyterminierte Polydiene mit guter Mikrostruktur und Funktionalitat sowie enger Molekulargewichtsverteilung unter Verwendung von Azobis-isobuttersaure-di-hydroxyethylarnid hergestellt werden konnen. Die Aktivierungsenergie des Initiatorzerfalls wurde durch volumetrische Messung des bei dieser Reaktion freiwerdenden Strickstoffs bestimmt. SUMMARY:It is shown, that hydroxyterminated polydienes of good microstructure and functionality and a narrow molecular weight distribution can be prepared using di-hydroxyethyl-azo-bis-isobutyramide as an initiator. The activation energy of the initiator decay has been determined by volumetric measurement of the nitrogen evolved in this reaction. Ein leitung

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