Oxygen → Poly(2-vinyl pyridine)-b-polystyrene-b-poly(2-vinyl pyridine)

Participants

Reaction Steps

20 g of the copolymer of EPT-B was placed in a sealed flask and was suspended by the addition of 8.9 g of dried styrene (St), 0.9 g of dried vinylpyridine (referred to as VPy) and 80 ml of THF. 1.1 ml of dried oxygen was blown through to initiate the reaction, followed by stirring at room temperature for 30 hr. 100 ml of methanol was added to terminate the reaction. The precipitated polymer was extracted with acetone and heptane by the Soxhelt extractor in a nitrogen atmosphere over a period of 24 hr to obtain an insoluble diblock copolymer of EPT-O-(styrene/vinylpyridine copolymer) (referred to as EPT-O-P(St/VPy)).

Provenance & Evidence