POLYMERIZATION OF CYCLOHEXENE OXIDE WITH ALUMINUM COMPLEX-SILANOL CATALYST - 4. PHOTOPOLYMERIZATION WITH Ph3SiCOPh-Al COMPLEX-ALCOHOL CATALYST SYSTEM.

A new catalyst system (Ph//3SiCOPh-aluminum complex-alcohol) was investigated for photopolymerization of cyclohexene oxide. Polymer conversion and molecular weight increased with polymerization time. When a Ph//3SiCOPh-Al (n-Praa)//3-alcohol catalyst system was used the catalyst activity decreased, depending on the alcohol: i-PrOH greater than n-PrOH greater than i-BuOH greater than MeOH greater than t-BuOH greater than H//2O. When the Ph//3SiCOPh-Al complex-i-PrOH catalyst system was used the catalyst activity decreased, depending on the ligand of the Al complex: beta -ketoester greater than orthocarbonyl phenol greater than beta -diketone. Benzophenone derivatives were effective for catalyst activation as a photosensitizer.