A series of AB-type diblock copolymers composed of polystyrene (PS) as the A block and poly(ethylene oxide) (PEO) as the B block was synthesized by sequential anionic polymerization. The prepared copolymers had fixed molecular weights for the PS blocks and varying lengths for the PEO chains. Problems connected with the preparation of the initiator, cumylpotassium, were analysed and a new synthetic approach for its preparation proposed. Our synthetic procedure enables spectroscopically pure PS-PEO diblock copolymers free of high molecular weight impurities to be prepared.
Посилання на статтю:
An improved technique of the cumylpotassium preparation: application in the synthesis of spectroscopically pure polystyrene-poly(ethy!ene oxide) diblock copolymers / Zdenek Hruska*, Guy Hurtrez, Serge Walter and G6rard Riess // Polymer. – 1992. – Vol 33. – P. 2447-2449.