摘要
采用差热扫描方法（ＤＳＣ）研究了樟脑酮（ＣＱ）／过氧化物（ＰＯ）复合体系引发三缩乙二醇双甲基丙烯酸酯（ＴＥＧＤＭ）的可见光聚合．与ＣＱ单一引发体系相比，ＣＱ和ＰＯ组成的复合体系更为有效．实验结果指出，加入过氧化物，如ＤＣＰＯ和ＤＢＰＯ，使聚合速率显著增加，最大速率到达时间明显缩短，然而它们对应的过氧化氢化合物，如ＴＢＨＰ、ＣＭＨＰ却效果不佳，复合体系的增效作用表明，激发态ＣＱ通过能量传递机制，使过氧化物发生有效的光解生成活性自由基，同时发现在含氧的条件下聚合反应速率得到增加．
Visible light photopolymerization of triethyleneglycol dimethacrylate (TEGDMA)initiated by camphorquinone(CQ) and peroxide (PO) combination systems were studied with photocalorimetry for the purpose on dental materials. As comparison with CQ alone, the systems composed of CQ and peroxides PO are more effective. The results obtained indicated that the peroxide added, such as dicumyl peroxide (DCPO), di tertbutylperoxide(DBPO) greatly accelerates the polymerization rate( R p) and shortens the time of R p max reached( t max ), however their corresponding hydroperoxide, such as tert butylhydroperoxide (TBPO) and cumyl hydroperoxide (CHHP) appears a less efficient. The reaction mechanism of the synergistic effect for CQ/PO system was suggested to be a energy transfer process from excited CQ * to peroxide, which results in a significant facilitation of the active radical generation from peroxide. The rate enhancement of polymerization was also found in the presence of oxygen.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1999年第2期205-209,共5页
Acta Polymerica Sinica
