Novel thermally degradable diepoxy crosslinkers containing sulfonate ester groups for photo-crosslinking
- 作者：Shin ; Yeong-Deuk ; Kawaue ; Akiya ; Okamura ; Haruyuki ; Shirai ; Masamitsu
- 关键词：Photo-crosslinking ; Thermal degradation ; Sulfonate ester ; Epoxide
- 刊名：Polymer Degradation and Stability
- 出版年：2004
- 期刊代码：85_01413910
- 类别：ms
- 出版时间：October, 2004
- 卷：86
- 期：1
- 页码：153-158
- 文件大小：264 K
摘要
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 photochemically stable. Cr-1 and Cr-2 initiated photo-crosslinking reaction with poly(vinylphenol) (PVP), a copolymer of methacrylic acid and ethyl methacrylate (P(MAA-EMA)), and poly(7-oxabicyclo[4.1.0]hept-3-yl)methyl p-styrenesulfonate) (POHMSS). After irradiation at 254nm, the Cr-1 or Cr-2/polymer blended film became insoluble and the degree of insolubilisation increased with baking at 100–140°C. Solubilisation due to decrosslinking was observed by baking at higher temperatures (150–200°C). The crosslinker/POHMSS system showed high efficiency in photo-thermal crosslinking and thermal decrosslinking at high temperatures.