[CH2:1]=[CH:2][CH:3]=[CH2:4].[CH2:5]([Li])[CH2:6][CH2:7][CH3:8].CN(CCN(C)C)C>CCCCCC>[CH2:1]=[CH:2][CH:3]=[CH2:4].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1In this experiment, a styrene-butadiene polymer was synthesized utilizing the continuous polymerization procedure of this invention. A two-reactor system which consisted of a 1-gallon first reactor and a 2-gallon second reactor was utilized with the polymerization temperature being maintained at about 190° F. (88° C.). In the procedure used, 1,3-butadiene was charged into the first reactor at a rate of 115.2 grams per minute, n-butyl lithium was charged into the first reactor as a 0.25M solution at a rate of 1.6 grams per minute and TMEDA was charged into the first reactor as a 0.25M solution at a rate of 1.04 grams per minute. The 1,3-butadiene monomer was charged into the reactor as a 16 weight percent premix solution in hexane. The residence time in the first reactor was 0.51 hours.
Loading…
