Effect of carbazole/tetracyanoethylene binary sensitizer on photografting of methacrylic acid on polyethylene film

✍ Scribed by Hitoshi Kubota; Hiroaki Kozai; Yoshitaka Ogiwara

• Book ID: 103076912
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 263 KB
• Volume: 26
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(90)90091-h

✦ Synopsis

A~tract--Effect of carbazole (CZ)/tetracyanoethylene (TCE) binary sensitizer on photografting of methacrylic acid on low-density polyethylene film (thickness = 30/am) was examined at 40 ° and 60 ° in aqueous medium. Based on the study of absorption spectra, CZ and TCE seemed to form a 1 : 1 complex, appearing at 400 and 600 nm in the spectra. The system sensitized with CZ/TCE binary sensitizer showed higher percent grafting and graft efficiency than the CZ-sensitized system. Moreover, a certain composition of the binary sensitizer most effective for grafting was found; this composition was about 30 mol% of TCE in the binary sensitizer, at which maxima of percent grafting and graft efficiency were afforded. This behaviour of CZ/TCE-sensitized photografting was discussed in terms of formation of a charge transfer complex between CZ and TCE and formation of polyethylene radicals caused by the binary sensitizer.