Isoprene → Styrene

Participants

Reaction Steps

Further subsequently, with temperature controlled so as to keep the system at 50 to 60° C., 2.88 kg of isoprene was continuously added to the reactor, taking 1 hour. After the addition of styrene, this was further polymerized for 1 hour. The polymerization conversion of isoprene was 100%. After this, 1.99 kg of styrene was continuously added to the reactor, taking 30 minutes. After the addition of styrene, this was further polymerized for 1 hour thereby giving two types of styrene/isoprene/styrene block copolymers with one of the respective two styrene blocks having a different molecular weight from each other. The polymerization conversion of styrene was 100%.

Provenance & Evidence