UV-induced Crosslinking of Poly(vinyl acetate) Films Containing Benzophenone (벤조페논을 함유한 폴리비닐아세테이트 필름의 자외선 조사에 의한 가교)

Young-Jae Sim (심영재); Gyong-Jun Choi (최경준); Eun-Kyo Seo (서은교); Sung-Jong Yoon (윤성종); Jang, Jin-Ho (장진호)

UV-induced Crosslinking of Poly(vinyl acetate) Films Containing Benzophenone

Textile Coloration and Finishing
Abbr : Text. Color. and Finish.
2009, 21(4), pp.33-38
Publisher : The Korean Society Of Dyers And Finishers
Research Area : Engineering > Fiber Engineering > Dyeing Engineering

Young-Jae Sim ¹, Gyong-Jun Choi ¹, Eun-Kyo Seo ¹, Sung-Jong Yoon ¹, Jang, Jin-Ho ¹

¹금오공과대학교

Accredited

ABSTRACT

Poly(vinyl acetate) films containing benzophenone were photocrosslinked by continuous UV irradiation. UV irradiation of PVAc film containing 5% benzophenone induced bulk crosslinking of the polymer indicated by 84.1% of gel fraction after ethyl acetate extraction. The crosslinking was attributed to the recombination of tertiary polymer radicals generated upon UV irradiation, which was enhanced by the hydrogen abstraction of benzophenone. Also the UV irradiation resulted in scission of ester linkage and photooxidation of PVAc surface, which was verified by ATR and zeta potential analysis, implying that the PVAc surface became more polar and hydrophilic. The zeta potential proportionally increased from +4.5mV to -26.8 mV with increasing UV irradiation. Also the surface energy of the PVAc film increased with higher UV irradiation upto 56.5 mJ/m2 by the enhanced Lewis acid/base component with larger contribution of Lewis acid parameter. Accordingly the crosslinked PVAc showed higher thermal stability with increasing UV energy.

KEYWORDS

PVAc, photocrosslinking, hydrophilicity, gel fraction, thermal stability

Citation status

* References for papers published after 2023 are currently being built.

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