光引发剂 (photoinitiator)又称光敏剂(photosensitizer)或光固化剂(photocuring agent)，是一类能在紫外光区(250～420nm)或可见光区(400～800nm)吸收一定波长的能量，产生自由基、阳离子等，从而引发单体聚合交联固化的化合物。
光引发剂(photoinitiator，PI)是光固化体系的关键组成部分，它关系到配方体系在光辐照时，低聚物及稀释剂能否迅速由液态转变成固态，即关联固化。
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The influence of the ratio of two resins, concentration of photoinitiator, and LTV’ irradiation time on the properties of cured film was investigated also.
本文还系统的考察了树脂在光固化时，两种基体树脂配比的不同、光引发剂用量的变化、光照时间的不同对于涂料固化交联度的影响。
参考来源 - 光固化粉末涂料的研制The effect of the photo-initiator, the content of photo-initiator, the content of co-monomer and the structure of oligomers to the curing speed were discussed.
同时,讨论了光引发剂、光引发剂含量、稀释单体含量以及不同树脂单体结构对光固化速度的影响。
参考来源 - 树枝状聚氨酯丙烯酸酯的合成与应用·2,447,543篇论文数据，部分数据来源于NoteExpress
研究了白色体系UV 固化粉末涂料用的光引发剂。
This article has studied the photoinitiators for white UV curing powder coatings.
综述了光引发剂以及它们在紫外光固化粘合剂中的应用研究进展。
In this paper, research progress of the photo-initiators and their applications in UV curable adhesive were reviewed.
介绍了光引发剂及活性单体的研究进展，最后对光固化技术的发展趋势进行了展望。
Photoinitiator and reactive monomer were introduced and lastly the development directions of UV technology were viewed in this paper.
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