Degradation of synthetic oligomers by microorganisms. Part V. Bacterial degradation of 1,4-type polybutadiene.

Tsuchii, Akio; Suzuki, Tomoo; Fukuoka, Seiichi

doi:10.1271/bbb1961.48.621

Cited by 9 publications

(3 citation statements)

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“…Cross-links from fragments with molecular weight larger than M c may not be easily extracted due to chain entanglements. Conversely, there are reports in the literature that oligomers of polyisoprene or polybutadiene with a molecular weight of up to approximately 10 3 can be rapidly utilized by microorganisms, while oligomers with a molecular weight exceeding 2 × 10 3 are very slowly attacked [ 37 , 38 , 39 ]. The scission of longer polymeric chains of natural rubber produces short oligomers with molecular weights below 10 3 , which are rapidly consumed by the microorganism.…”

Section: Resultsmentioning

confidence: 99%

“…The reduction of double bonds and the presence of aldehydes indicate oxidative cleavage as the mechanism of degradation of natural rubber ( Figure 11 ). The network of the natural rubber is attacked directly by the biological action during microbial degradation, with the oligomers produced by the scission of polymeric chains being used by the organism as growth substrate [ 37 , 38 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

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Development and Characterization of Polymer Eco-Composites Based on Natural Rubber Reinforced with Natural Fibers

et al. 2017

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Natural rubber composites filled with short natural fibers (flax and sawdust) were prepared by blending procedure and the elastomer cross-linking was carried out using benzoyl peroxide. The microbial degradation of composites was carried out by incubating with Aspergillus niger recognized for the ability to grow and degrade a broad range of substrates. The extent of biodegradation was evaluated by weight loss and cross-linking degree study of composites after 2 months incubation in pure shake culture conditions. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR) have proved to be precious and valuable instruments for morphological as well as structural characterization of the composites before and after incubation with Aspergillus niger.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Development and Characterization of Polymer Eco-Composites Based on Natural Rubber Reinforced with Natural Fibers

et al. 2017

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“…[7][8][9][10][11] The connection of oligomers with biodegradable chemical structures forms biodegradable polymers. Matsumura et al 6 made poly(carboxylic acid) biodegradable by the incorporation of vinyl alcohol into the main chain.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable polymer made of styrene and N‐benzyl‐4‐vinylpyridinium chloride

Kawabata¹,

Kakimoto²,

Ikeuchi³

2006

J of Applied Polymer Sci

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A copolymer of styrene with N-benzyl-4-vinylpyridinium chloride (BVP), poly(styrene-co-N-benzyl-4-vinylpyridinium chloride) (PST-co-BVP), was degradable by activated sludge in soil when the oligo-styrene portion was sufficiently small. The degradation of the equimolar copolymer followed first-order kinetics when the polymer sample was 1.0 or 0.5 g/kg and gave a half-life of 5.6 days. The degradation of PST-co-BVP with a reduced BVP content did not follow first-order kinetics under the aforementioned conditions but appeared to follow the kinetics when the amount of the polymer sample was sufficiently small. Under the ultimate conditions, the half-life of PST-co-BVP that contained 10.6 mol % BVP was estimated to be 12.5 days, and the half-life of PST-co-BVP that contained 5 mol % BVP was expected to be 30 -40 days. The incorporation of 5 mol % BVP appeared sufficient for making PST-co-BVP substantially biodegradable if we did not expect exceptionally rapid degradation. PST-co-BVP was different from conventional polystyrene but possessed biodegradability. Random scission of the main chain much predominated over uniform scission from the end of the polymer chain in the biodegradation of PST-co-BVP. The cleavage of the main chain at BVP appeared predominant over that of oligo-styrene.

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