On the structure/properties relationships in photoinitiators of polymerization
On the structure/properties relationships in photoinitiators of polymerization
复制标题
聚合光引发剂的结构/性能关系
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
J. Fouassier
中科院分区：
文献类型：
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作者：
J. Fouassier
光引发剂的选择部分取决于对高固化速度的要求。许多反应性单体和高效光引发剂已被合成并在市场上销售。然而，改进的光引发剂系统，表现出越来越快的固化速度和/或增加的光敏性，越来越需要。在激发态的本征反应性决定了一个给定的光引发剂的兴趣，参考其效率。然而，其他因素，如高分子吸收系数和宽光谱吸收范围，协同效应，黄化，可提取性和对长期稳定性的影响，必须被考虑为重要因素。一个有吸引力的研究和发展领域是在影响一个给定结构的反应性的决定性参数所起的作用，如在选定的位置上的化学取代，水溶性的特征，酸释放能力和共聚潜力。激光光谱学被证明是实时研究激发态动力学及其过程的最方便的工具。
The choice of photoinitiators is partly governed by the requirement of a high curing speed. Many reactive monomers and efficient photoinitiators have been synthesized and are commercially available. However, improved photoinitiator systems, exhibiting increasingly faster curing speeds and/or increased photosensitivity, are increasingly required. The intrinsic reactivity in the excited states determines the interest of a given photoinitiator with reference to its efficiency. However, other factors e.g. high molecular absorption coefficients and a broad spectral absorption range, synergistic effects, yellowing, extractability, and the effect on the long-term stability, must be considered as important. An attractive field of research and development is found in the role played by decisive parameters affecting the reactivity of a given structure, such as chemical substitution in well-chosen positions, the character of water solubility, acid release ability, and copolymerization potential. Laser spectroscopy proved a most convenient tool for the real time investigation of the excited state dynamics and the processes involved.