Beschreibung:
<jats:title>Abstract</jats:title><jats:p>The ionene poly[(dimethyliminio) ethylene(dimethyliminio) methylene‐1,4‐phenylenemethylene dichloride] was synthesized and characterized. Number‐, mass‐ and z‐average molar masses <jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>n</jats:sub>, <jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>w</jats:sub> and <jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>z</jats:sub>, and molar mass distribution were determined using equilibrium ultracentrifugation. With detection by means of Schlieren, interference, and UV optics. <jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>w</jats:sub> was additionally determined by static light scattering. All measurements yield within the experimental error the same value of <jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>w</jats:sub> viz. <jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>w</jats:sub> = 12,2 · 10<jats:sup>3</jats:sup> g/mol. This value agrees well with the value from an analysis of kinetical data, viz. <jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>w</jats:sub> = 11,4 · 10<jats:sup>3</jats:sup> g/mol. Molar mass distribution <jats:italic>w</jats:italic>(<jats:italic>M</jats:italic>) was determined from the concentration profile extrapolated to concentration γ<jats:sub>0</jats:sub> = 0; it is of a Wesslau‐type and relatively broad. The non‐uniformity <jats:italic>U</jats:italic> = <jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>w</jats:sub>/<jats:styled-content><jats:italic>M</jats:italic></jats:styled-content><jats:sub>n</jats:sub> − 1 ≈ 3. According to the theory of polycondensation a Schulz‐Flory type of distribution should be obtained. A Schulz‐Flory distribution is not achieved because the monomers <jats:italic>p</jats:italic>‐xylylene dichloride and <jats:italic>N</jats:italic>,<jats:italic>N</jats:italic>,<jats:italic>N</jats:italic>′,<jats:italic>N</jats:italic>′‐tetramethylethylenediamine exhibit higher reactivity in the initiation reaction than the homologs during chain propagation which results in a broader molar mass distribution than a Schulz‐Flory distribution.</jats:p>