English Abstract
Biodegradability of Low Density Polyethylene Containing
Biodegradation-inducing Agents. Biodegradation in Soil for 13 Years

Tomoko WATANABE1,5
Yoshito OHTAKE1
Hitoshi ASABE2
Mutsuhisa FURUKAWA5
1; Chemicals Evaluation and Research Institute, Japan, Kitakatsushika-gun, Saitama, Japan
2; Hagihara Industries, Inc., Kurashiki, Okayama, Japan
3; ITOCHU Co., Minato-ku, Tokyo, Japan
4; Takenaka Co., Inzai, Chiba, Japan
5; Graduate School of Science and Technology, Nagasaki University, Nagasaki, Japan
Nippon Gomu Kyokaishi,(2008),81(6),204-210 Original Paper in Japanese

Biodegradation of low density polyethylene (LDPE) containing biodegradation-inducing agents was carried out in soil for 13 years.
When LDPE containing biodegradation-inducing agents composed of starch, vegetable oil, calcium oxide, metal compounds, and oxidized wax were buried in soil for 13 years, biodegradation proceeded to some extent. The progress of degradation was monitored by the remaining weight, SEM, GPC and FT-IR measurement of the specimen. Differed from the ordinary oxidative degradation, formation of carbon-carbon double bond and hydroxy group together with carbonyl function was confirmed in the sample used in this study. Though the rate of biodegradation was still slow, the significant acceleration was observed by using the biodegradation-inducing agents compared with that of LDPE alone.

(Received on January 22, 2008)
(Accepted on April 12, 2008)

Low Density Polyethylene (LDPE), Soil, Biodegradation, Oxidative Degradation, Biodegradation - inducing Agents