Development of Biodegradable LDPE Compound and the Estimation of its Biodegradablility.

Ohtake, Yoshito; Kobayashi, Tomoko; Itoh, Shigeki; Asabe, Hitoshi; Yabuki, Masuo; Murakami, Nobunao; Ono, Ken

doi:10.2324/gomu.67.698

Cited by 2 publications

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“…We have been ascertaining that low-density polyethylene (LDPE) fully exhibits its biodegradability when exposure conditions surrounding the LDPE are ready for its degradation, although its development is very slow. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] For example, LDPE mulch films buried and plowed in fields for several years show notably whitened parts over their whole area due to microscopic pores generated by enzymatic degradation by microbes, which is characteristic biodegradation. 10 Also, in case of mayonnaise bottles, made of LDPE by blow molding process and buried in soil for over 32 years, when their surfaces in contact with the soil have been compared with those not in contact with the soil, the decrease of molecular weight and the remarkable tailing of molecular weight distribution to lower molecular weight side have been recognized at the surfaces in contact with the soil.…”

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confidence: 99%

“…We have been ascertaining that low‐density polyethylene (LDPE) fully exhibits its biodegradability when exposure conditions surrounding the LDPE are ready for its degradation, although its development is very slow 1–15. For example, LDPE mulch films buried and plowed in fields for several years show notably whitened parts over their whole area due to microscopic pores generated by enzymatic degradation by microbes, which is characteristic biodegradation 10.…”

Section: Introductionmentioning

confidence: 99%

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Biodegradability and degrading microbes of low‐density polyethylene

Watanabe

Ohtake

Asabe

et al. 2008

J of Applied Polymer Sci

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We have isolated and identified three types of low‐density polyethylene (LDPE) degrading microbes, for the first time, from soil which was sampled from the field. It has been studied that thermooxidized or UV irradiation LDPE are degraded when incubated with mold (Volke‐sepulveda et al., J Appl Polym Sci 2002, 83, 305; Yamada‐Onodera et al., Polym Degrad Stab 2001, 72, 323); however, there was no article so far reporting the isolation of these particular microbes from the environment. Here, the mechanism of biodegradation of LDPE by the three microbes is described. We used LDPE film, which was buried in soil and biodegraded, and the surrounding soil, located at Nogi Town, Tochigi Prefecture, Japan as the sources of sample for this study. The sample was added to a liquid medium, together with powder of a photodegraded, antioxidant‐free LDPE film, as the sole source of carbon. After enriched cultivation, three strains of microbes were separated from the medium. They were classified on the basis of LDPE degrading capabilities, confirmed by OH generation and degradation traces. Using “Bergey's Manual of Determinative Bacteriology,” the genera of the microbes were identified as Bacillus circulans, Bacillus brevies, and Bacillus sphaericus, which belong among the Natto bacteria, common in soil. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biodegradability and degrading microbes of low‐density polyethylene

Watanabe

Ohtake

Asabe

et al. 2008

J of Applied Polymer Sci

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“…RO* + (:OHf + Fe+ 3 degradação de pollmeros ocorre mais rapidamente quanto menor for ~ cristalinidade deles. Assim, para a famHia das poliolefinas; por exemplo, o desaparecimentc aumenta na ordem a seguir: PP <PEAD< PEBDL < PEBD[36]. 2.3.5.…”

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“…Quando são empregados aditivos biodegradáveis, tal como o amido, o consumo deste pelos microrganismos aumenta a porosidade e a razão superfície/volume do filme, o qual resulta na perda da integridade da matriz polimérica, aumentando a sua degradabilidade[34,35,36,37,38,39). Khabbaz et ai[35) observaram que amostras de PEBD contendo pró-oxidantes foram fortemente susceptíveis a oxidação térmica.…”

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Estudo de blendas potencialmente biodegradaveis de poli(3-hidroxibutirato) (PHB) e polietileno de baixa densidade (PEBD)

Silva¹,

Mei²

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À professora Dr. •. Lúcia Me i pela orientação, dedicação e acima de tudo pela amizade.Ao professor Dr. Agnelli, pela co-orientação durante o trabalho.À CAPES pelo apoio financeiro a esta pesquisa.À Union Carbide do Brasil, na pessoa de José Wilson, pelo fornecimento da resina de PEBD e execução de corpos de prova para conclusão deste trabalho. Sem sua ajuda e de sua equipe, José Augusto e Vanessa este trabalho não seria possível. À Empresa Resin Pó, por gentilmente pulverizar o PEBD usado nesta tese. À Cognis do Brasil na pessoa do Vanderson, pelo doação do aditivo utilizado neste trabalho. À USF-Universidade São Francisco, na pessoa do Prof. Dr. Derval, pelas análises de biodegradação. Aos alunos de Iniciação Científica Fabiana e Paulo, pela ajuda durante este trabalho. Ao Dema -Opto. de Materiais da UFSCar -pelo espaço cedido, na pessoa do Prof. Dr. Agnelli. vi Ao Instituto de Química-Unicamp, na pessoa do Prof. Dr. Marco Auréli< de Paoli, por conceder o espaço de seu laboratório para processarmos nossc material. Às estagiárias do Bloco G -Instituto de Química, Katlen e Aline, p e l ~ ajuda e dedicação durante este período. Aos meus irmãos Camila e Carlos e a toda minha família por estarem sempre ao meu lado me apoiando.

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Development of Biodegradable LDPE Compound and the Estimation of its Biodegradablility.

Cited by 2 publications

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Biodegradability and degrading microbes of low‐density polyethylene

Biodegradability and degrading microbes of low‐density polyethylene

Estudo de blendas potencialmente biodegradaveis de poli(3-hidroxibutirato) (PHB) e polietileno de baixa densidade (PEBD)

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