NEW RESULTS OF THE SELF-INITIATION MECHANISM OF SH EN ADDITION POLYMERIZATION/

No radicals are formed in bis(mercaptopropionate)-diene-mixtures, as s hown by means of ESR spectroscopic investigation. Radicals are produce d spontaneously only in the presence of triethylene glycol dithiol. Th e hydrogen-bonded structure of the dithiopropionates is obviously resp onsible for the inhibition of the charge transfer interaction with the diene compounds and prevents subsequent radical formation. The C-13 N MR spectra confirm the anti-Markownikow structure of the polymers form ed with diallyl succinate and diallyl terephthalate.