Controlled radical polymerization: Control of molecular weight, composition and stereoregularity in homogeneous and heterogeneous systems

S.A.F. Bon, G. Chambard, F.A.C. Bergman, E.H.H. Snellen, B. Klumperman, A.L. German

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

6 Citations (Scopus)

Abstract

The kinetics of CRP based upon alkoxyamines/nitroxides mediated systems, are described. The possibility to control the stereoregularity via this technique is shown. Trans-2,2,5,5-substituted pyrrolidine based nitroxides, which preferred a half-chair (C2) conformation at room temp., were synthesized. The prepn. of alkoxyamines with a racemic mixt. of trans-2,5-bis(methoxycarbonyl)-2,5-dimethyl-1-oxypyrrolidine and styrene, acrylonitrile, Me acrylate and Me methacrylate all showed exclusively one pair of diastereoisomeric enantiomers. The parameters for the Arrhenius equation for the homolytic dissocn. of 1-t-butoxy-2-phenyl-2-(1-oxy-2,2,6,6-tetramethylpiperidinyl)-ethane were detd. Ea = 138.8 kJ/mol +- 18 kJ/mol and ln(A) = 34.5 +- 0.6. A method to det. both the chain-length and viscosity dependence of the rate parameters of radical trapping by the nitroxide and bimol. termination based upon the kinetics in a CRP system is given
Original languageEnglish
Title of host publicationBook of Abstracts, 213th ACS National Meeting, San Francisco, April 13-17
Place of PublicationWashington, D.C.
PublisherAmerican Chemical Society
PagesPOLY-540
Publication statusPublished - 1997
Event213th ACS National Meeting - San Francisco, United States
Duration: 13 Apr 199717 Apr 2013

Conference

Conference213th ACS National Meeting
CountryUnited States
CitySan Francisco
Period13/04/9717/04/13

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