Alpha-Methylstyrene → Benzene, ethenyl-, polymer with (1-methylethenyl)benzene

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Reaction Steps

A 50:50 weight ratio copolymer of alpha-methylstyrene and styrene is made by means of continuous anionic polymerization so as to have a 195,000 Mw and a Mw /Mn of 2.2. 2884.1 grams of the anionically polymerized copolymer are dried mixed with 941.1 grams of the grafted rubber/ungrafted rubber mixture from Example 2. The mixture is fed to a Baker Perkins MP mixer compounding line. The compounding section is operated at 400 rpm and the extruder is run at 110 rpm. The melt temperatures are 203°, 207°, 203° and 211° C. in zone 1, zone 2, the extruder and the die, respectively. The compounding line is fed at a rate of about 20 pounds per hour of polymer-rubber blend.

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