li ratio 15______________________________________ copolymerization of a 5000 molecular weight epoxy terminated polystyrene macromonomer with tetrahydrofuran using a cationic initiator system in a dry 500 ml 3 necked flask equipped with a thermometer and mechanical stirrer the following ingredients were reacted under a nitrogen atmosphere ______________________________________recipe______________________________________tetrahydrofuran g 2675k ps macromer g 16 0propylene oxide g 4 initiatorbf sub 3 etherate mmol system 6 1reaction time hr 3reaction temperature u00b0 c 0______________________________________ gel permeation chromatrograph characterization of the final reaction mixture indicated that 70 of the ps macromonomer copolymerized under these conditions to give a 27 73 styrene thf graft copolymer experiments were performed in a one gallon reactor in accordance with the following recipe ______________________________________step icyclohexane ml 1350styrene g 242 5s butyllithium effective mmol 18 7polymerization time min 10polymerization temperature u00b0 c 60 u00b0 step iiethylene sulfide mmol 14 0reaction time min 10ethylene sulfide mmol 14 0reaction time min 10reaction temperature u00b0 c 60 u00b0 step iiivinyl benzyl chloride mmol 56 1reaction temperature u00b0 c 60 u00b0 reaction time min 60summary of terminating sequenceethylene sulfide li ratio 1 5vinyl benzyl chloride li ratio 3 0______________________________________ copolymerization of the resulting vinylphenyl terminated polystyrene macromonomer with n butyl acrylate using a free radical initiator was performed in citrate bottles according to the following recipe bottles were rotated in a constant temperature bath for the specified time ______________________________________recipe______________________________________ethyl acetate g 12513 k ps macromer g 8 6n butyl acrylate g 25 8vazo 64 aibn g 07polymerization temperature u00b0 c sup 60 u00b0 polymerization time hr 16______________________________________ gel permeation chromatography characterization of the final reaction mixture indicated that 91 of the ps macromonomer copolymerized under these conditions to give a 25 75 styrene n butyl acrylate graft copolymer these results indicate that the ps macromonomer is at least 91 functional here again replacement of.