UV and Thermal Oxidation of Polyethylene Compounded with Photosensitizer

Jun CL

Korea Polymer Journal, Vol.3, No.1, 7-11, April, 1995

The photoinitiated oxidative degradation was measured in polyethylene films compounded with the photo-sensitizer. The oxidation was monitered by changes of carbonyl formation detected by IR spectroscopy. The disintegration of mechanical properties of polyethylene films was analyzed by change of elongation-at-break which can be associated with a brittleness. The two measurements bing us the same conclusion that the oxidative aging proceedes in the dark, once the oxidation has been initiated by UV-irradiation. These experiments actually mean that a continous oxidative aging of the photo-degradable plastics occurs even after buing under ground.

[References]

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Bokalek EG, Henderson JN, Serafini TT, Shelton JR, J. Appl. Polym. Sci., 2, 210 (1959)
Vink P, "Degradation and Stabillisation of Polyolefins," p. 213, Ed. by N.S. Allen, Appl. Sci. Publ., England (1983)

[1] Mayo FR, J. Polym. Sci. C: Polym. Lett., 14, 713 (1976)

[2] Buchachenko AL, J. Polym. Sci. Polym. Symp., 57, 299 (1977)

[3] Zsuzsa LH, Iring M, Balint G, Kelen T, Tudos F, Magy. Kem. Foly., 83, 257 (1977)

[4] Kawamatsu S, NKK HDH, 12, 65 (1977)

[5] Iring M, Zsuzsa LH, Kelen T, Tudos F, Fuzes L, Samay G, Bodor G, J. Polym. Sci. Polym. Symp., 57, 55 (1977)

[6] Iring M, Zsuzsa LH, Barbas K, Kelen T, Tudos F, Eur. Polym. J., 14, 439 (1978)

[7] Barbas M, Iring M, Laszlo-Hedvig ZS, Kelen T, Tudos F, Magy. Kem. Foly., 84, 344 (1978)

[8] Ivanov VB, Butyagin SG, Shlyapintokh VY, Kinet. Katak., 20, 1330 (1979)

[9] Stivala SS, Kimura J, Gabbay SM, "Degradation and Stabilization of Polyolefins," Ed. by N.A. Allen, Appl. Sci. Pub., England (1983)

[10] Reich L, Stivala SS, "Elements of Polymer Degradation," McGarw-Hill, New York (1971)

[11] Gugumus F, Makromol. Chem. Macromol. Symp., 27, 25 (1989)

[12] U.S. Patent, 4,037,034 (1977)

[13] U.S. Patent, 3,978,033 (1976)

[14] U.S. Patent, 3,994,869 (1976)

[15] G.B. Patent, 1,412,877 (1975)

[16] G.B. Patent, 2,187,193 A (1989)

[17] U.S. Patent, 3,454,510 (1978)

[18] U.S. Patent, 4,067,836 (1978)

[19] Kubota H, Takahashi K, Ogiwara Y, Polym. Degrad. Stabil., 24, 201 (1987)

[20] Omichi H, Hagiwara M, Polym. Photochem., 1, 15 (1981)

[21] vanKrevelen DW, "Properties of Polymers," p. 470, Elsevier England (1976)

[22] Bokalek EG, Henderson JN, Serafini TT, Shelton JR, J. Appl. Polym. Sci., 2, 210 (1959)

[23] Vink P, "Degradation and Stabillisation of Polyolefins," p. 213, Ed. by N.S. Allen, Appl. Sci. Publ., England (1983)