1998 Fiscal Year Final Research Report Summary
Development of Biodegradable Synthetic Polymers by In-vestment of Affinity with Micro-organisms
| Project/Area Number |
09558077
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
環境保全
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
KAWABATA Nariyoshi Kyoto Institute of Technology, Faculty of Engineering and Design Professor, 工芸学部, 教授 (70025998)
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| Co-Investigator(Kenkyū-buntansha) |
HASHIMOTO Hiroyuki Kyoto Institute of Technology Faculty of Textile Science Assistant, 繊維学部, 助手 (20263171)
IKURA Koji Kyoto Institute of Technology, Faculty of Textile Science Professor, 繊維学部, 教授 (00101246)
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| Project Period (FY) |
1997 – 1998
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| Keywords | Poly (methyl methacrylate) / N-Benzyl-4-vinylpyridinium Chloride / N-Allyl-4-vinylpyridinium Bromide / N-Methyl-4-vinylpyridinium Io-dide / Blended Polymer / Activated Sludge / Poly (hexamethylen adipamide) / Pyridyl Group |
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| Research Abstract |
Based on a finding that poly(methyl methacrylate) turned biodegradable by incorporation of a small amount of pyridinium group into the main chain, this research was aimed at development of new technology for investment of biodegradability for synthetic polymers by partial modification of chemical structure, During the treatment with activated sludge, blended samples of homopolymer of methyl methacrylate with poly(methyl methacrylate) containing N-benzyl-4-vinylpyridinium chloride in the main chain, the homopolymer did not exhibit degradation. Enhancement of the affinity of whole polymeric materials with micro-organisms did not exert biodegradation of the synthetic polymer, and incorporation of the pyridinium group into the main chain was found to be essentially necessary for the investment of biodegradability for synthetic polymers. A variety of pyridinium groups were examined and N-allyl-4-vinylpyridinium bromide and N-methyl-4-vinylpyridinium iodide were found to be more effective than N-benzyl-4-vinylpyridinium chloride in the investment of biodegradability for poly(methyl methacrylate). Molecular level investigation on the degradation of poly(methyl methacrylate) containing N-benzyl-4-vinylpyri-dinium chloride in the main chain as well as N-benzyl-4-ethylpyridinium chloride as a model compound. The major reaction product from the model compound was 4-ethylpyridine. Poly(methyl methacry-late) containing N-benzyl-4-vinylpyridinium chloride in the main chain lost chlorine during the biological treatment. These observations indicated that an importance chemical process during the biodegradation. included elimination of benzyl chloride. Poly(hexamethylen adipamide) containing pyridyl group in the polymer chain was found to be degraded by the action of activated sludge, and the present methodology was shown to be applicable for synthetic polymers prepared by polycondensation.
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