Gamma Irradiation Effect on the Thermal Stability, Optical and Electrical Properties of Acrylic Acid/ Methyl Methacrylate Copolymer Films
Yasser H. A. Fawzy, Amr El-Hag Ali, Ghada F. El-Maghraby, Reda M. Radwan
DOI: 10.4236/wjcmp.2011.11003   PDF    HTML     7,617 Downloads   16,184 Views   Citations


Copolymer films of Acrylic acid/ Methyl methacrylate AAc/MMA with comonomer composition of 60/40 was prepared and then irradiated by gamma irradiation. The effect of irradiation on some of the physical properties of the copolymer films was investigated. The dose level ranged from 5 to 200 kGy. The thermo gravimetric analysis (TGA) showed that the thermal stability of the films increased with irradiation dose up to 100 kGy then it started to decrease. The results of the UV-Visible spectroscopy of the films showed a decrease in the values of optical band gap and band tail width with doses starting from 100 kGy. The DC conductivity (?DC) of the films was found to decrease to about three orders of magnitude from its original value with irradiation dose up to 100 kGy then it started to increase with higher doses. Moreover, the dielectric constant and dielectric loss values were found to increase with dose up to 100 kGy which may be attributed to the increase in the number of dipoles in the films due to the irradiation of the copolymer films in air. The results indicated that crosslinking dominated over chain scission in the copolymer films with irradiation dose up to 100 kGy then at higher doses, chain scission dominated.

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Y. Fawzy, A. Ali, G. El-Maghraby and R. Radwan, "Gamma Irradiation Effect on the Thermal Stability, Optical and Electrical Properties of Acrylic Acid/ Methyl Methacrylate Copolymer Films," World Journal of Condensed Matter Physics, Vol. 1 No. 1, 2011, pp. 12-18. doi: 10.4236/wjcmp.2011.11003.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] El-Hag Ali, H. A. Shawky, H. A. Abd El Rehim, E.A. Hegazy, Synthesis and characterization of PVP/AAc copolymer hy-drogel and its applications in the removal of heavy metals from aqueous solution , European Polymer Journal 39, 2337-2344 (2003).
[2] Andrzej G. Chmielewski , Mohammad Haji-Saeid, Shamshad Ahmed, Progress in radiation processing of poly-mers, Nuclear Instruments and Methods in Physics Research B 236, 44-54 (2005).
[3] Shehap, R. A. Abd Allah, A. F. Basha, F. H. Abd EL-Kader, Electrical Properties of Gamma Irradiated, Pure, and Nickel Chloride-Doped Polyvinyl Alcohol Films, Journal of Applied Polymer Science, Vol. 68, 687-698 (1998).
[4] Banford HM, Fouracre RA, Faucitano A, Butta-fava A, Martinotti F. The influence of gamma irradiation and chemical structure on the dielectric properties of polypropylene. Radiat Phys Chem 48(1), 129-30 (1996).
[5] Erjun Tang, Guoxiang Cheng , Xiaolu Ma, Preparation of nano-ZnO/PMMA composite particles via grafting of the co-polymer onto the surface of zinc oxide nanoparticles, Powder Technology 161, 209-214 (2006).
[6] F. Sharaf, M. H. I. El-Eraki, A. R. El-Gohary & F. M. A. Ahmed, The optical and mechanical properties before and after gamma irradiation of poly (viny1 alcohol) films doped with lead acetate, Polymer Degradation and Stability 47, 343-348 (1995).
[7] F. Yakuphanoglu, G. Bar?m, I. Erol, The effect of FeCl3 on the optical constants and optical band gap of MBZMA-co-MMA polymer thin films, Physica B 391, 136-140 (2007).
[8] Hiroshi Yoshida and Tsuneki Ichi-kawa,Temperature effect on the radiation-degradation of poly(methyl methacrylate), Radiat. Phys. Chem. Vol. 46, No. 4-6, 921-924 (1995).
[9] H. M. Abdel-Hamid, Y. H. A. Fawzy and S. M. El-Sayed, Optical and Morphological Proper-ties of Electron –beam Irradiated High-Density Thin Poly Eth-ylene Films, Egypt. J. Rad. Sci., Applic. Vol. 18, No. 2, 465-479 (2005).
[10] L. C. Lopérgolo, L. H. Catalani, L. D. B. Machado, P. R. Rela, A.B. Lug?o, Development of reinforced hydrogels- I. Radiation induced graft copolymerization of methyl methacrylate on non-woven polypropylene fabric, Ra-diation Physics and Chemistry 57, 451-454, (2000).
[11] Maria Omastova, Juraj Pavlinec, Jurgen Pionteck ,Frank Simon,”Synthesis, Electrical Properties and Stability of Polypyrrole-Containing Conducting Polymer Composite, Polymer International 43, 109-116 (1997).
[12] R. M. Radwan, S. lotfy, O. S. Desouky, Enhancement of the electrical per-formance of poly(vinyl) alcohol by doping with chlorophyll and gamma irradiation, Nucl. Instr. and Meth. in Phys. Res. B 266, 3953-3958 (2008).
[13] R. M. Radwan, Y. H. A. Fawzy, A. El-Hag Ali, Electrical behaviour of butyl acrylate / methyl methacrylate copolymer films irradiated with 1.5 MeV electron beam, Radiation Physics and Chemistry, 77,179-185 (2008).
[14] R. M. Radwan, Y. H. A. Fawzy, H. A. Ashry, F. A. S. Soliman, Characterization of the electrical behavior of rare earth elements during the upgrading of monazite. J. Phys. D 37, 764-769(2004).
[15] R. Mishra , S. P. Tripathy , D. Sinha , K. K. Dwivedi, S. Ghosh, D.T. Khathing , M. Muller , D. Fink , W.H. Chung, Optical and electrical properties of some electron and proton irradiated polymers, Nuclear Instruments and Methods in Physics Research B 168, 59-64 (2000).
[16] R. Mishra, S. P. Tripathya, K. K. Dwivedi, D. T. Khathing, S. Ghosh, M. Muller, D. Fink, Electron induced modification in polypropylene, Radiation Measurements 33, 845-850 (2001).
[17] R. Sosa Fonseca, M. Flores, R. Rodriguez T., J. Hernández, A. Mun?z F., Evidence of energy transfer in Er3+-doped PMMA-PAAc copolymer samples, Journal of Lu-minescence 93, 327-332 (2001).
[18] Sangita Rajvaidya, R. Bajpai, A. K. Bajpai, Effect of gamma irradiation on the inter-penetrating networks of gelatin and polyacrylonitrile: Aspect of crosslinking using microhardness and crosslink density meas-urements, Journal of Applied Polymer Science, Vol. 101, 2581-2586 (2006).
[19] Tadaaki Inoue, Guohua Chen, Katsu-hiko Nakamae, Allan S. Hoffman, An AB block copolymer of oligo(methyl methacrylate) and poly(acrylic acid) for micellar delivery of hydrophobic drugs, Journal of Controlled Release 51, 221-229(1998).

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