Balcerak Alicja, Kabatc Janina
UTP University of Science and Technology, Faculty of Chemical Technology and Engineering Seminaryjna 3 85-326 Bydgoszcz Poland
RSC Adv. 2019 Sep 10;9(49):28490-28499. doi: 10.1039/c9ra05413h. eCollection 2019 Sep 9.
The ability of two-component dyeing photoinitiating systems for the radical polymerization of 1,6-hexanediol diacrylate (HDDA) and 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate (TMPTA) is presented. The systems under study comprised a hemicyanine dye as a sensitizer and iodonium salts that played a role of a coinitiator. The kinetic parameters of the polymerization reaction, such as the rate of polymerization ( ) and the degree of conversion of monomer ( ), were estimated. The thermodynamic feasibility of an electron transfer process in the systems studied was verified and calculated using the Rehm-Weller equation. It was found that a benzoxazole derivative in the presence of iodonium salts effectively initiated the polymerization of acrylate monomers. The polymerization rates of about 10 s and the degree of conversion of acrylate groups from 20% to 50% were observed. The effects of photoinitiator structures on the initiating ability and spectroscopic properties of sensitizers are described in this article.
本文介绍了双组分染色光引发体系对1,6 - 己二醇二丙烯酸酯（HDDA）和2 - 乙基 - 2 -（羟甲基）-1,3 - 丙二醇三丙烯酸酯（TMPTA）进行自由基聚合的能力。所研究的体系包含一种半菁染料作为敏化剂和起共引发剂作用的碘鎓盐。估算了聚合反应的动力学参数，如聚合速率（ ）和单体转化率（ ）。利用雷姆 - 韦勒方程验证并计算了所研究体系中电子转移过程的热力学可行性。结果发现，在碘鎓盐存在下，一种苯并恶唑衍生物能有效引发丙烯酸酯单体的聚合反应。观察到聚合速率约为10秒，丙烯酸酯基团的转化率为20%至50%。本文描述了光引发剂结构对敏化剂引发能力和光谱性质的影响。
