摘要
通过不同结构的脂肪胺和三羟甲基丙烷三丙烯酸酯(Trimethylopropane tricrylate,TMPTA)之间的迈克尔加成反应合成了四种不同结构的胺助引发剂。采用实时红外(Real-time infrared spectroscopy,RTIR)研究了二苯甲酮(Benzophenone,BP)/二缩三丙二醇二丙烯酸酯(Tripropylene glycol diacrylate,TPGDA)/胺助引发剂体系的光聚合反应活性。采用紫外分光光度计研究了BP/胺助引发剂在紫外光辐照下的黄变性能。研究结果表明,随着胺助引发剂分子结构中羟基含量的增加,光聚合反应速率呈现下降趋势。羟基含量相同,若胺助引发剂分子量增加,光聚合反应速率则下降,但双键的最终聚合转化率几乎相同;叔胺结构的助引发剂在光固化过程中黄度较高,有较强的黄变倾向性;随着分子结构中羟基含量增加,黄变倾向性也增强。实验结果为合成新型黄变性小的胺类助引发剂提供借鉴。
Four kinds of amines co-initiator with different structure were synthesized in Michael-Addition reaction with aliphatic amine and trimethylolprpane triacrylate （TMPTA）. The photo-polymerization of tripropylene glycol diacrylate （TPGDA） / benzophenone （BP） / amine co-initiator was investigated by real-time infrared spectroscopy （RTIR）. The yellowing of BP/amine co-initiator during UV curing was characterized by ultraviolet spectrophotometer. The results show that the increment of the content of hydroxyl group leads to the decrement of the photopolymeriza- tion rate. And the photo-polymerization rate decreases with the increment of molecular weight for the equal hydroxyl content. But there is no change with the double bond conversion. It has been demonstrated that the amines co-initiator with tertiary amine structure can cause higher yellowness index （YI） and faster yellowness index growth during UV irradiation than that with secondary amine structure. And the YI also increases with the increment of the content of hydroxyl group in the amines co-initiator. Lower yellowness index amines co-initiator could be synthesized based on the results obtained in this paper.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
北大核心
2008年第5期280-284,共5页
Journal of Radiation Research and Radiation Processing
基金
国家自然科学基金(20774010)资助
关键词
胺助引发剂
实时红外
黄度
紫外分光光度计
Amine co-initiator, Real-time infrared spectroscopy （RTIR）, Yellowness index, Ultraviolet spectro-photometer
