Laboratory investigation of biodegradability of a polyurethane foam under anaerobic conditions

Urgun‐Demirtas, Meltem; Singh, Dileep; Pagilla, Krishna

doi:10.1016/j.polymdegradstab.2007.04.013

Cited by 64 publications

(38 citation statements)

References 36 publications

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“…12,13 As a result they undergo degradation or bio-degradation, at very slow rate. 12,13 As a result they undergo degradation or bio-degradation, at very slow rate.…”

Section: Degradation Of Plastics/ Polyurethanesmentioning

confidence: 99%

New insights into the microbial degradation of polyurethanes

Mahajan¹,

Gupta²

2015

RSC Adv.

111

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“…12,13 As a result they undergo degradation or bio-degradation, at very slow rate. 12,13 As a result they undergo degradation or bio-degradation, at very slow rate.…”

Section: Degradation Of Plastics/ Polyurethanesmentioning

confidence: 99%

New insights into the microbial degradation of polyurethanes

Mahajan¹,

Gupta²

2015

RSC Adv.

111

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“…Biodegradation of the polyurethane depends on the process conditions, chemical structure and compositions, morphology, crystallinity, hard and soft segment ratio, etc. [28]. Microorganisms utilized polyurethane as carbon and/or nitrogen source.…”

Section: Biodegradation Studymentioning

confidence: 99%

Epoxy modified bio-based hyperbranched polyurethane thermosets

Kalita

Karak

2012

Designed Monomers and Polymers

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Modification of the existing polymers leads to improvement of many desirable properties. Hence, prepared hyperbranched polyurethane was modified with different amounts of bisphenol-A based epoxy resin. The modified system was cured by cycloaliphatic amine hardener at 120°C for a specified period of time. The curing reaction was confirmed by Fourier transform infrared spectroscopy and swelling study. The tensile strength (5.5-16 MPa), scratch hardness (3-10 kg) and gloss (85°-94°) increased with the increase of epoxy content. The thermo-gravimetric analysis showed the enhancement of thermal stability (240-291°C) of the modified systems. Biodegradation was tested by the broth culture technique and the modified hyperbranched polyurethanes also exhibited adequate biodegradation. Incorporation of reactive modifier into the polyurethane network was demonstrated to be an effective way to improve the thermal and mechanical properties, simultaneously.

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“…In the treated sample, IR spectra mostly overlapped with the IR spectra of control, but at the wavenumber of urethane bond (R-COONH-R'), there was a sight decreased at the wavenumbers 1720 and 1660 cm -1 referring to ester carbonyl group (C=O) and urethane (NH) in Fig. 3 [15]. The urethane bond in polyurethane foam may be broken down due to the microbial enzymes, whereas the selected microorganisms could not degrade the rubber structure which is used as a raw material in PU foam production.…”

Section: Determination Of Structural Changes Using Ft-ir Analysismentioning

confidence: 90%

Biodegradation of Synthetic Rubbers by a Mixed Culture Isolated from Various Rubber Factory Soils in Songkhla, Thailand

2017

IJAAEE

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Abstract-Mixed cultures of rubber degrading bacteria were isolated from soils of rubber factories in Songkhla province, Thailand. Mixed culture B could utilize latex as the sole carbon source on agar plate and over 30 days, a maximum of 7.38 % and 7.78 % weight loss was obtained respectively utilizing rubber gloves and polyurethane foam made from natural rubber. The FT-IR results confirmed the reduction that associated with double bonds in cis-1,4-polyisoprene, CH 2 and CH 3 in aliphatic compounds. The formation of aldehyde groups increased as an intermediate during rubber biodegradation. Moreover, the urethane bond in polyurethane foam also was broken down by microbial enzymes. The Mixed culture B was then identified to Gram positive bacterium (B1) and Gram negative bacteria (B2 and B3). All the results in this study have been promising an alternative choice to eliminate the solid waste of rubber synthetic materials.

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Laboratory investigation of biodegradability of a polyurethane foam under anaerobic conditions

Cited by 64 publications

References 36 publications

New insights into the microbial degradation of polyurethanes

New insights into the microbial degradation of polyurethanes

Epoxy modified bio-based hyperbranched polyurethane thermosets

Biodegradation of Synthetic Rubbers by a Mixed Culture Isolated from Various Rubber Factory Soils in Songkhla, Thailand

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