光交联新型含磺酸酯可热降解二环氧交联剂

Novel thermally degradable diepoxy crosslinkers containing sulfonate ester groups for photo- crosslinking

合成和表征了新含热降解磺酸酯键的二环氧交联剂（Cr-1，Cr-2和Cr-3）。从FTIR和UV光谱可以看出，Cr-1和Cr-2的光化学作用可以产生磺酸，而cr-3则是光化学稳定的。Cr-1和Cr-2引发的聚乙烯基苯酚（PVP）、甲基丙烯酸和甲基丙烯酸乙酯的共聚物（P（MAA—EMA））及聚对苯乙烯磺酸（7-氧杂二环[4．1．0]庚-3-基）甲基酯（POHMSS）进行光交联反应。254nm辐照后，Cr-1或Cr-2／聚合物薄膜不溶解。不溶解度在100—140℃由于烘烤而增加。高温（150—200℃）烘烤时观察到解交联造成的增溶溶解。交联剂／POHMSS体系的光-热交联和高温热解交联的效率很高。

New diepoxy crosslinkers（Cr- 1 ,Cr- 2 and Cr- 3）containing thermally degradable sulfonate ester linkages were synthesized and characterized. From FT - IR and UV spectroscopic experiments, it was confirmed that Cr - 1 and Cr - 2 photochemically generated sulfonic acid, while Cr - 3 was photochemieally stable. Cr - 1 and Cr - 2 initiated photo - crosslinking reaction with poly （vinylphenol） （PVP）, a copolymer of methaerylic acid and ethyl methactTlate（P（ MAA. EMA） ）, and poly（7 - oxabicyclo[4.1 . 0 ] hept - 3 - yl）methyl p- styrenesulfonate）（ POHMSS）. After irradiation at 254mn, the Cr- 1 or Cr- 2/polymer blended film became insoluble and the degree of insolubilisation increased with baking at 100- 140℃. Solubilisation due to deerosslinking was observed by baking at higher temperatures（ 150 - 200℃） . The crosslinker/POHMSS system showed high efficiency in photo - thermal erosslinking and thermal decrosslinking at high temperatures.