(1-methylethenyl)-benzenhomopolymer;Benzene,(1-methylethenyl)-,homopolymer;ALPHA-METHYLSTYRENE POLYMER;ALPHA-METHYLSTYRENE HOMOPOLYMER;A-METHYLSTYRENE POLYMER;Poly(alpha-methylstyrene) average Mn 790 by VPO, beads;POLY(ALPHA-METHYLSTYRENE) STANDARD 20'00 0;Poly(alpha-methylstyrene) Standard (Mw 10,000)