Abstract
Cellulose acetate (degree of substitution 2.45) films containing diphenyliodonium salt and benzophenone were prepared and their degradative behavior was examined under simulated solar exposure. Acetic acid generation from the films under irradiation was greater in the co-presence of diphenyliodonium salt and benzophenone than in the sole presence of diphenyliodonium salt. Photosensitization and free-radical oxidization, which are followed by Brønsted acid generation, were postulated as the mechanism for the observed increase of deacetylation. The patterns of decreased molecular weight were different between the films with the diphenyliodonium salt and those with benzophenone; while the films with the diphenyliodonium salt kept a relatively constant molecular-weight distribution, the polydispersity increased in the films with benzophenone during the degradation. Since the synthesized characteristics of those two different patterns of change in molecular-weight distribution were observed in the co-presence of the diphenyliodonium salt and benzophenone, each additive appeared to act independently to lead to main-chain cleavage of cellulose acetate. Therefore, decrease in the molecular weight of cellulose acetate by diphenyliodonium salt did not seem to be enhanced in the co-presence with benzophenone.
Similar content being viewed by others
Abbreviations
- BP:
-
Benzophenone
- CA:
-
Cellulose acetate
- DPI:
-
Diphenyliodonium trifluoromethanesulfonate
- M n :
-
Number-average molecular weight
- M w :
-
Weight-average molecular weight
- SEC:
-
Size exclusion chromatography
References
Buchanan CM, Gardner RM, Komarek RJ (1993) Aerobic biodegradation of cellulose acetate. J Appl Polym Sci 47:1709–1719
Dektar JL, Hacker NP (1990) Photochemistry of diaryliodonium salts. J Org Chem 55:639–647
Dektar JL, Hacker NP (1991) Comparison of the photochemistry of diarylchloronium, diarylbromonium, and diaryliodonium salts. J Org Chem 56:1838–1844
Fouassier J-P, Ruhlmann D, Takimoto Y, Harada M, Kawabata M (1993) New three-component initiation systems in UV curing: a time-resolved laser-spectroscopy investigation. J Polym Sci Part A: Polym Chem 31:2245–2248
Gu J-D, Eberiel DT, McCarthy SP, Gross RA (1993a) Cellulose acetate biodegradability upon exposure to simulated aerobic compostiong and anaerobic bioreactor environments. J Environ Polym Degrad 1:143–153
Gu J-D, Eberiel DT, McCarthy SP, Gross RA (1993b) Degradation and mineralization of cellulose acetate in simulated thermophilic compost environments. J Environ Polym Degrad 1:281–291
Hiller LA Jr (1953) The reaction of cellulose acetate with acetic acid and water. J Polym Sci 10:385–423
Hosono K, Kanazawa A, Mori H, Endo T (2006) Degradative behaviour of cellulose acetate film in the presence of photoacid generator. J Adhes Soc Jpn 42:350–355
Kaczmarek H, Kaminska A, Swiatek M, Sanyal S (2000) Photoinitiated degradation of polystyrene in the presence of low-molecular organic compounds. Eur Polym J 36:1167–1173
Komarek RJ, Gardner RM, Buchanan CM, Gedon S (1993) Biodegradation of radiolabeled cellulose acetate and cellulose propionate. J Appl Polym Sci 50:1739–1746
Lin CS, Liu WL, Chiu YS, Ho S-Y (1992) Benzophenone-sensitized photodegradation of polystyrene films under atmospheric conditions. Polym Degrad Stab 38:125–130
Malm CJ, Tanghe LJ, Laird BC (1950) Primary hydroxyl groups in hydrolyzed cellulose acetate. J Am Chem Soc 72:2674–2678
Manivannan G, Fouassier JP (1991) Primary processes in the photosensitized polymerization of cationic monomers. J Polym Sci Part A Polym Chem 29:1113–1124
Merlin A, Fouassier J-P (1980) Photochemical investigations into cellulosic materials. I. Free radical generation in cellulose by photosensitized excitation. Angew Makromol Chem 86:109–121
Merlin A, Fouassier J-P (1982) Photochemical investigations into cellulosic materials. IV. Photosensitized free radical generation in cellulose acetate and oligosaccharide compounds. Angew Makromol Chem 108:185–195
Millan MD, Locklin J, Fulghum T, Baba A, Advincula RC (2005) Polymer thin film photodegradation and photochemical crosslinking: FT-IR imaging, evanescent waveguide spectroscopy, and QCM investigations. Polymer 46:5556–5568
Pappas SP, Pappas BC, Gatechair LR, Jilek JH, Wolfram S (1984a) Photoinitiation of cationic polymerization. IV. Direct and sensitized photolysis of aryl iodonium and sulfonium salts. Polym Photochem 5:1–22
Pappas SP, Gatechair LR, Jilek JH (1984b) Photoinitiation of cationic polymerization III. Photosensitization of diphenyliodonium and triphenylsulfonium salts. J Polym Sci Polym Chem Ed 22:77–84
Puls J, Altaner C, Saake B (2004) Degradation and modification of cellulose acetates by biological systems. Macromol Symp 208:239–253
Sakai K, Moriyoshi K (1997) Biodegradation of synthetic polymer. Biodegradation of cellulose acetate. Kagaku to Kogyo (Tokyo, Jpn) 71:490–496
Taylor LJ, Tobias JW (1977) Accelerated photo-oxidation of polyethylene. I. Screening of degradation-sensitizing additives. J Appl Polym Sci 21:1273–1281
Torikai A, Takeuchi T, Fueki K (1983) Photodegradation of polystyrene and polystyrene containing benzophenone. Polym Photochem 3:307–320
Yagci Y, Reetz I (1998) Externally stimulated initiator systems for cationic polymerization. Prog Polym Sci 23:1485–1538
Yamashita Y, Endo T (2004a) Deterioration behavior of cellulose acetate films in acidic or basic aqueous solutions. J Appl Polym Sci 91:3354–3361
Yamashita Y, Endo T (2004b) Effect of hydrophilic polymers on degradation behavior of cellulose acetate by phosphoric acid. J Adhes Soc Jpn 40:368–379
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Hosono, K., Kanazawa, A., Mori, H. et al. Enhanced degradation of cellulose acetate film containing diphenyliodonium salt–benzophenone. Cellulose 14, 529–537 (2007). https://doi.org/10.1007/s10570-007-9127-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10570-007-9127-y