Effect of phenolic compounds on the polymerization of methyl methacrylate.
The inhibitory effects of six phenolic compounds and two analogues on the polymerization of methyl methacrylate (MMA) by azobisisobutyronitrile (AIBM) were examined. Differential scanning calorimetry was used to determine the induction period (IP) and initial rate of polymerization (IRP). The IP values (minutes) decreased in the order: eugenol > thymol > hydroquinone > cresol > guaiacol > phenol >>> safrole > methol. The IRP values of all compounds tested ranged from 0.8 to 1.2 percent per minute, except for hydroquinone (0.2 percent per minute). Phenolic compounds inhibited the polymerization of MMA by scavenging radicals, and eugenol was the most potent inhibitor.
Fujisawa
S
S
Faculty of Dentistry, Tokyo Medical and Dental University, Japan.
Kadoma
Y
Y
D003408:Cresols / Q000737:chemistry; D005054:Eugenol / Q000737:chemistry; D005609:Free Radicals; D006139:Guaiacol / Q000737:chemistry; D006873:Hydroquinones / Q000737:chemistry; D008610:Menthol / Q000737:chemistry; D020366:Methylmethacrylate; D008768:Methylmethacrylates / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D012451:Safrole / Q000737:chemistry; D013943:Thymol / Q000737:chemistry
D003408:Cresols; D005609:Free Radicals; D006873:Hydroquinones; D008768:Methylmethacrylates; D010636:Phenols; D008610:Menthol; D020366:Methylmethacrylate; D013943:Thymol; D005054:Eugenol; D006139:Guaiacol; D012451:Safrole