𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis of diazoresin and its photocrosslinking reaction

✍ Scribed by Cao, Shuguang; Zhao, Chao; Cao, Weixiao

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
246 KB
Volume
45
Category
Article
ISSN
0959-8103

No coin nor oath required. For personal study only.

✦ Synopsis

Diazoresins with di †erent speciÐc viscosities were prepared from diphenylamine-4-diazonium salt and paraformaldehyde in concentrated sulphuric acid with di †erent ratios of In order to obtain a diazo-CH 2 O/wN 2 `X~. resin with a speciÐc viscosity in a given time at 0È5Β‘C, more than a stoichiometric ratio was necessary.

The photocrosslinking reaction of the diazoresins with various binder resins in solid Ðlm was investigated. The results show that the photocrosslinking reaction took place only in a system composed of diazoresin and binder resin containing wOH side-chain groups. The photodecomposition of diphenylamine-4-diazonium salt and its diazoresin in alcohol was studied. It was demonstrated that the diphenylamine aryl cation formed on decomposition is the dominant intermediate. The photocrosslinking mechanism between diazoresin and binder resin is discussed in a preliminary way.

1998 SCI. (

πŸ“œ SIMILAR VOLUMES

Synthesis and characterization of 3-meth
Synthesis and characterization of 3-methoxydiphenylamine-4-diazonium salt and its diazoresin
✍ Weixiao Cao; Chao Zhao; Jiawei Cao πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 160 KB πŸ‘ 2 views

3-Methoxydiphenylamine-4-diazonium salt (MDDS) and its diazoresin were synthesized. The photo-and thermal decomposition of salt and the resins were investigated. The results show that MDDS exhibits excellent thermostability as well as high photosensitivity. A series of diazoresins with different org

Synthesis and characterization of 2-sulp
Synthesis and characterization of 2-sulphonic diphenylamine-4-diazonium salt and its diazoresin
✍ Zhao, Chao; Lu, Yinxian; Cao, Weixiao πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 142 KB πŸ‘ 2 views

2-Sulphonic diphenylamine-4-diazonium salt (SDDS) and its diazoresin were synthesized and their thermal stability and photosensitivity were investigated. The results show that the thermal stability of SDDS is better than that of diphenylamine-4-diazonium salt (DDS), and is close to that of 3-methoxy

Syntheses and characterization of photoc
Syntheses and characterization of photocrosslinkable poly(amic acid-co-urea)s with diazoresin
✍ Jui-Hsiang Liu; Shin-Yen Lee; Fu-Ren Tsai πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 174 KB πŸ‘ 1 views

To improve the transparency, flexibility, and solubility of polyimide, and to fabricate a negative working photoresist, polyamic acid, polyurea, and poly(amic acidco-urea) in various contents were synthesized. Photosensitive diazoresin was synthesized and was used as the photocrosslinking agent. Cha

Synthesis and characterization of N-meth
Synthesis and characterization of N-methyl-2-nitrodiphenylamine-4-diazonium salt and its diazoresin
✍ Renxian Wang; Jinyu Chen; Weixiao Cao πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 123 KB πŸ‘ 2 views

A new substituted diphenylamine diazonium salt, N-methyl-2-nitrodiphenylamine-4-diazonium salt (MNDDS) and its diazoresin (MNDDS-resin) were synthesized and their thermostability as well as photosensitivity were investigated. The results show that MNDDS and resin exhibit much higher thermostability