Analysis of polymerization behavior of dental dimethacrylate monomers by differential scanning calorimetry

The polymerization and copolymerization activity of dental monomers was investigated using the dynamic differential scanning calorimetry (DSC) method. As aliphatic dimethacrylate monomers, ethyleneglycol dimethacrylates with different lengths of ethyleneglycol and urethane dimethacrylates were used....

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Published in:Journal of Oral Science 1999, Vol.41(1), pp.9-13
Main Authors: Hayakawa, Tohru, Takahashi, Kuninobu, Kikutake, Kazuyo, Yokota, Ichirou, Nemoto, Kimiya
Format: Article
Language:English
Subjects:
Bisphenol A-Glycidyl Methacrylate - chemistry
Calorimetry, Differential Scanning
Chemical Phenomena
Chemistry, Physical
Composite Resins - chemistry
copolymerization activity
Dental Materials - chemistry
Dentistry
differential scanning calorimeter
dimethacrylate monomer
Hot Temperature
Humans
Methacrylates - chemistry
Phenylenediamines - chemistry
Polyethylene Glycols - chemistry
polymerization activity
Polymers - chemistry
Polymethacrylic Acids - chemistry
Polyurethanes - chemistry
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Summary:The polymerization and copolymerization activity of dental monomers was investigated using the dynamic differential scanning calorimetry (DSC) method. As aliphatic dimethacrylate monomers, ethyleneglycol dimethacrylates with different lengths of ethyleneglycol and urethane dimethacrylates were used. As aromatic dimethacrylates, Bis-GMA (2, 2-bis [4- (3-methacryloxy-2-hydroxypropoxy) pheny1] propane), BMPEPP (2, 2-bis (4-methacryloxy poly-ethoxyphenyl) propane), and DMB (1, 2-dimethacryloyloxy benzene) were used. Ethyleneglycol dimethacrylates showed sharp exothermic peaks, and the maximum temperatures (Tp) at the exothermic peaks of the DSC curves decreased according to the lengths of ethyleneglycols. Among urethane dimethacrylates, UDMA (dimethacryloxyethyl 2, 2, 4-trimethylhexamethylene diurethane) and DMPHU (di- (2-methacryloxypropyl) hexamethylene diurethane) showed sharp exothermic peaks, but DMEHU (di- (2-methacryloxyethyl) hexamethylene diurethane) showed an endothermic peak as well as exothermic peaks. This suggests that reactions other than polymerization occurred in the case of DMEHU. The polymerization activity of aromatic dimethacrylates was lower than that of ethyleneglycol dimethacrylates and urethane dimethacrylates. The copolymerization activity of TEGDMA (triethyleneglycol dimethacrylate) and DMB was also investigated using the dynamic DSC method. The DSC curves of the copolymerization between DMB and UDMA or BMPEPP showed broad peaks, but the DSC curves of the copolymerization between TEGDMA and UDMA or BMPEPP showed sharp peaks. The copolymerization activity of TEGDMA was better than that of DMB. (J. Oral Sci. 41, 9-13, 1999)
ISSN:1343-4934
1880-4926
DOI:10.2334/josnusd.41.9