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首页> 外文期刊>Journal of Applied Polymer Science >Ethyl-4-(dimethylamino) benzoate initiation of the spontaneous polymerization of aqueous acidic adhesive formulations in the presence of a base
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Ethyl-4-(dimethylamino) benzoate initiation of the spontaneous polymerization of aqueous acidic adhesive formulations in the presence of a base

机译：在碱存在下，水性酸性胶粘剂制剂自发聚合的4-（二甲基氨基）苯甲酸乙酯引发

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This study indicated that the spontaneous polymerization of an aqueous acidic dental adhesive system containing ethyl-4-(dimethylamino) benzoate (4E) could be activated by various bases. The adhesive was prepared with a monomer mixture of bis[2-(methacryloyloxy)ethyl] phosphate (2MP) and 2-hydroxyethyl methacrylate (HEMA). Various amounts of base [hydroxyapatite (HAP) and its analogues, e.g., Ca(OH)_2, NaOH, and calcium carbonate] were added. Real-time Fourier transform infrared-attenuated total reflectance spectroscopy was used to monitor the polymerization process. The pH and buffer capacity affected the degree of conversion, and the polymerization rate and induction period were evaluated. The optimal conditions for the pH of this system was between 1.0 and 1.8, and HAP had the best performance on polymerization because of its excellent buffer capacity. The mechanism for the spontaneous polymerization of the 2MP/HEMA adhesive system was proposed with 4E as an initiator.
机译：这项研究表明，包含4-（二甲基氨基）苯甲酸乙酯（4E）的水性酸性牙科粘合剂体系的自发聚合可以被各种碱活化。用磷酸双[2-（甲基丙烯酰氧基）乙基]酯（2MP）和甲基丙烯酸2-羟乙酯（HEMA）的单体混合物制备粘合剂。加入各种碱[羟基磷灰石（HAP）及其类似物，例如Ca（OH）_2，NaOH和碳酸钙]。实时傅里叶变换红外衰减全反射光谱用于监测聚合过程。 pH和缓冲容量影响转化率，并且评估聚合速率和诱导期。该体系的最佳pH条件为1.0至1.8，HAP因其出色的缓冲能力而具有最佳的聚合性能。提出了以4E为引发剂的2MP / HEMA胶粘剂体系自发聚合的机理。

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