Abstract
AbstractPolymerisation of vinyl acetate in the presence of some molecular sieves, Sephadex and CaX type Zeolite, led, in well defined experimental conditions, to polymers with a regular structure. Evidence of the role of molecular sieves as a matrix for stereoregular polymerisation was provided by n.m.r. spectra and scanning electron microscopy, while the pyrolysis‐ gas chromatography and elemental analysis have pointed out the separation of polymer from matrix. The experimental data obtained on polymerisation of vinyl acetate in the presence of molecular sieves allowed us to postulate the presence of a donor‐acceptor type reaction mechanism.
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