Abstract: ［Objective］In order to reduce the curing temperature of polyimide（PI）system and to ensure its reaction controllability and storage stability.［Methods］This study synthesized a biomass-derived thymine-based photobase generator，thymine-1-acetic acid diazabicyclononene salt（TY-DBN），and applied it to cure polyamic acid resin coatings.［Results］TY-DBN released the superbase 1，5-diazabicyclo［4. 3. 0］-5-nonene（DBN）under UV irradiation. The curing kinetics demonstratedthat the optimal curing temperature decreased from 197. 00 ℃ to 60. 11 ℃，the apparent activation energy was reduced by two orders of magnitude（from 4. 49×10⁴ J/mol to 6. 57×10² J/mol）， and the reaction order decreased from 0. 93 to 0. 28. Normalized infrared spectroscopy confirmed a significantincrease in the imidization degree of the coating resin after low-temperature curing.［Conclusion］This study significantly improved the thermal curing performance of polyamic acid resin，providing a research strategy for developing low-temperature curable polyimide coating.

Key words: photobase generator, thymine, polyimide, low-temperature curing

摘要： 【目的】为了降低聚酰亚胺（ PI）体系固化温度，且保证其反应可控性和贮存稳定性。【方法】合成了基于生物质胸腺嘧啶的光产碱剂胸腺嘧啶 .1-乙酸重氮双环壬烯盐（ TY-DBN）并应用于聚酰胺酸树脂涂层的固化。【结果】 TY-DBN经紫外光辐照可释放超强碱 1，5-二氮杂双环 [4. 3. 0]-5-，壬烯（ DBN）固化动力学研究表明，聚酰胺酸树脂最佳固化温度由 197. 00 ℃降低至 60.11 ℃，表观活化能降低 2个数，量级，由 4. 49×10⁴ J/mol降至 6. 57×10² J/mol，反应级数由 0. 93降至 0. 28。且归一化红外表征证实涂层在低温固化后酰亚胺化程度显著提升。【结论】本研究显著改善了聚酰胺酸树脂的热固化性能，为开发低温固化聚酰亚胺涂层提供研究思路。

关键词: 光产碱剂, 胸腺嘧啶, 聚酰亚胺, 低温固化

CLC Number: 

• TQ630. 4