摘要： 【目的】探究 UV固化涂层内应力的产生机制、测量方法及其对附着力的影响，减少开裂、弯曲或剥落等缺陷，提高涂层的耐用性和外观质量。【方法】通过悬臂挠度法测量了不同配方下涂层的内应力，并研究了内应力与涂层附着力之间的关系。【结果】光引发剂的种类、树脂交联密度以及活性稀释剂的选择对涂层内应力的控制具有重要影响，合理调配配方能有效减小内应力积累，提升涂层的附着力，如 TPO引发剂可提升涂层交联密度与硬度，但需控制用量以防应力过高；稀释剂存在最佳添加量，且其链长增加可降低内应力。【结论】为提升光固化涂层附着力、减少缺陷提供了具体方法。

关键词: UV固化涂层, 附着力, 内应力, 挠度法

Abstract: ［Objective］To reduce defects such as cracking，bending or flaking，and to improve the durability and appearance quality of coating，it is important to investigate generation mechanism andmeasurement methods of internal stress in UV-cured coating，and effects of internal stress on adhesion.［Methods］ The internal stress of coatings with different formulations were measured using thecantilever deflection method，and the relationship between internal stress and coating adhesion strength was studied.［Results］The type of photoinitiator，resin crosslinking density，and selection of reactive diluents significantly influenced the control of internal stress in coatings. Rational formulation designcould effectively reduce internal stress accumulation and enhance coating adhesion. For instance，the TPO initiator could increase crosslinking density and hardness，but its dosage must be controlled to prevent excessive stress. Similarly，there has a optimal dosage of diluents，and the increase of their chain length could reduce internal stress.［Conclusion］ This work provides practical strategies forenhancing the adhesion of UV-cured coatings while minimizing defects.

Key words: UV-photocured coating, adhesion strength, internal stress, flexural method

中图分类号: 

• TQ637. 83