Study of microstructure of polypiperylene produced by cationic polymerisation

The microstructure of stereoregular 1,4-trans- and 1,4-cis- polypiperylenes as well as polymers produced from E- and Z- isomers of piperylene by cationic polymerization using TiCl4, was studied by the method of high resolution 13C-NMR-spectroscopy (125 MHz). The cationic polypiperylene obtained from Eisomer predominantly contains 1,4-trans- and 1,2-trans-units. The polypiperylene obtained by cationic polymerization of Z-isomer, shows more varied macrochain morphology, i.e. higher level of 1,2-cisunits, as well as 1,4-trans-units irregular (head to head and tail to tail) types of addition.