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目的研究不同芳叔胺对Ⅱ型聚甲基丙烯酸甲酯(PMMA)义齿基托树脂聚合过程中固化时间和固化温度等固化性能的影响,选取一种最佳引发用胺。方法本文设计了一种较为简单的实验装置,其中加热装置和温度计用来控制调节实验过程中的环境温度,发泡聚苯乙烯塑料作为Ⅱ型PMMA义齿基托树脂的反应容器,数位温度计用以记录实验过程中Ⅱ型PMMA义齿基托树脂体系的固化温度。结果在相同实验条件下,5种不同芳叔胺的Ⅱ型PMMA义齿基托树脂体系的固化参数不同。含有N,N-二(2-羟乙基)对甲苯胺的体系固化时间最小,固化温度最大值最高,温度依赖性最小。结论①本文设计的在线温度检测实验装置研究Ⅱ型义齿基托树脂聚合过程中的温度变化的研究方法可行,可以直接用于指导实践工作。②选择N,N-二(2-羟乙基)对甲苯胺(DHPT)为最佳的引发用胺。
Objective To study the effect of different aromatic tertiary amines on the curing properties such as curing time and curing temperature in the polymerization of type Ⅱ polymethyl methacrylate (PMMA) denture base resin. One of the best initiating amines was selected. Methods In this paper, a simple experimental apparatus was designed, in which the heating device and thermometer were used to control the ambient temperature during the experiment. Styrofoam plastic was used as the reaction vessel of type II PMMA denture base resin. The digital thermometer Record the curing temperature of Type II PMMA denture base resin during the experiment. Results Under the same experimental conditions, the curing parameters of Ⅱ type PMMA denture base resin with different aromatic tertiary amines were different. The system containing N, N-bis (2-hydroxyethyl) p-toluidine has the lowest curing time, the highest curing temperature and the lowest temperature dependence. Conclusions ① The online experimental device for temperature detection designed in this paper is feasible and can be directly used to guide the practical work of the research on the temperature change of type II denture base resin during polymerization. ② N, N-bis (2-hydroxyethyl) p-toluidine (DHPT) was selected as the best initiating amine.