Poly{1-(1-alkoxyalkoxy)-4-(1-methylethenyl)benzene} having narrow molecular weight distribution, its preparation process, and preparation process of poly{4-methylethenyl)phenol} having narrow molecular weight distribution

A poly{1-(1-alkoxyalkoxy)-4-(1-methylethenyl)benzene} having a narrow molecular weight distribution, which is a weight-average molecular weight of 2,000 to 100,000, and a weight-average molecular weight/number-average molecular weight ratio (Mw/Mn) of 1.6 or less, and having a repeating unit represented by the chemical formula (1)

• wherein R1 is hydrogen or an alkyl group having 1 to 3 carbon atoms;
• R2 is hydrogen, an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms;
• R3, R4 and R5 are each hydrogen, an alkyl group having 1 to 10 carbon atoms, an un-substituted, alkyl-substituted or alkoxy-substituted aryl group having 6 to 12 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkoxyalkoxy group having 1 to 10 carbon atoms;
• and R2 and R3 may bond to each other to form a ring structure, which is produced by anionic polymerization in the presence of organic alkali metal compound as a polymerization initiator.