Fujisawa S, Kadoma Y
Department of Oral Diagnosis, School of Dentistry, Meikai University, Saitama-Ken, Japan.
Biomaterials. 1997 May;18(9):701-3. doi: 10.1016/s0142-9612(96)00196-2.
This study was undertaken to examine an effect of eugenol on polymerization of methyl methacrylate (MMA) by benzoyl peroxide (BPO) and 2,2'-azobisisobutyronitrile (AIBN) in the presence of eugenol. The induction period and initial rate of polymerization (IRP) were determined from polymerization curves of MMA using differential scanning calorimetry (DSC). The induction period increased with increasing concentration of eugenol in both BPO and AIBN systems. The IRP decreased as the concentration of eugenol in both BPO and AIBN systems. The IRP decreased as the concentration of eugenol increased. Its decreasing rate in the BPO system was higher than that in the AIBN system. In the BPO system, the IRP was reduced to zero at 0.5 mol% of eugenol. Eugenol in the BPO system was an efficient retarder, although the decrease in IRP was relatively small, below 0.05 mol%. Eugenol was an inhibitor even at high concentration in the AIBN system. The suppressible effect of eugenol appears to be due to the interaction between free radicals from BPO and eugenol.
本研究旨在考察丁香酚在存在丁香酚的情况下，对过氧化苯甲酰（BPO）和2,2'-偶氮二异丁腈（AIBN）引发的甲基丙烯酸甲酯（MMA）聚合反应的影响。使用差示扫描量热法（DSC）从MMA的聚合曲线确定诱导期和聚合初始速率（IRP）。在BPO和AIBN体系中，诱导期均随丁香酚浓度的增加而延长。在BPO和AIBN体系中，IRP均随丁香酚浓度的增加而降低。其在BPO体系中的降低速率高于AIBN体系。在BPO体系中，当丁香酚含量为0.5 mol%时，IRP降至零。在BPO体系中，丁香酚是一种有效的阻滞剂，尽管在丁香酚含量低于0.05 mol%时，IRP的降低相对较小。在AIBN体系中，即使丁香酚浓度很高，它也是一种抑制剂。丁香酚的抑制作用似乎是由于BPO产生的自由基与丁香酚之间的相互作用。
