Effect of chemical structure on the biodegradation of polyurethanes under composting conditions

Kim, Young Duk; Kim, Sung Chul

doi:10.1016/s0141-3910(98)00017-2

Cited by 96 publications

(56 citation statements)

References 17 publications

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“…The polyurethane materials obtained with the use of polyester polyols are less resistant to hydrolysis compared to the polyether polyols. However, it makes them more favourable due to the biodegradability [6][7][8]. Polyurethanes based on the polyester polyols have better thermal and fire resistance than the polyether-based PUR and superior solvent resistance.…”

Section: Introductionmentioning

confidence: 99%

Structure analysis and thermal degradation characteristics of bio-based poly(propylene succinate)s obtained by using different catalyst amounts

Parcheta

Datta

2017

J Therm Anal Calorim

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Linear bio-based polyester polyols were prepared with the use of succinic acid and 1.3-propanediol (both with natural origin). As a catalyst was used tetraisopropyl orthotitanate (TPT). In order to determine the effect of various catalyst content on the thermal degradation characteristics, three different TPT amounts, as a 1.3-propanediol equivalent, were used, namely 0.1 mass% (PPS-0.1), 0.2 mass% (PPS-0.2) and 0.25 mass% (PPS-0.25). The reference polyol was prepared without catalyst employment (PPS-0.0). Fourier transform infrared spectroscopy was used to confirm molecular structure of the resulted polyols. The structure was also corroborated by 1 H NMR measurements, what confirmed nonsignificant catalyst amount impact on the structure of the prepared polyester polyols. Differential scanning calorimetry was carried out for glass transition temperature and melting point determination. The thermogravimetric analysis allowed to observe high thermal stability both under inert and oxidative atmosphere. This analysis affirmed also that the catalyst content did not influence significantly on the thermal degradation characteristics of the prepared polyols.

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Section: Introductionmentioning

confidence: 99%

Structure analysis and thermal degradation characteristics of bio-based poly(propylene succinate)s obtained by using different catalyst amounts

Parcheta

Datta

2017

J Therm Anal Calorim

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“…The thermal degradation of PUR results in the production of toxic products like hydrogen cyanide (HCN) and nitrogen oxides (NO x ), which have negative impact on environment as reported by Risholm-Sundman and Vestin (2005). Few microorganisms are known to degrade polyurethane (Crabbe et al 1994;Nakajima-Kambe et al 1995;Rowe and Howard 2002;Gautam et al 2007b) and the reports on lipase mediated PUR degradation are very much limited (Kim and Kim 1998). Enzymatic degradation is suggested to be an alternative to the conventional process as the hydrolytic products, organic acids and polyols could be recovered and used for chemical recycling of polymers apart from solid waste management.…”

Section: Introductionmentioning

confidence: 99%

Utilization of fish meal and fish oil for production of Cryptococcus sp. MTCC 5455 lipase and hydrolysis of polyurethane thereof

et al. 2015

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Fish meal has been used as an additional nitrogen source and fish oil as inducer for the growth and production of lipase from Cryptococcus sp. MTCC 5455. A response surface design illustrated that the optimum factors influencing lipase production were fish meal, 1.5 %, w/v, Na2HPO4, 0.2 %, w/v, yeast extract, 0.25 %, w/v and sardine oil, 2.0 %, w/v with an activity of 71.23 U/mL at 96 h and 25 °C, which was 48.39 % higher than the conventional one-factor-at-a-time method. The crude concentrated enzyme hydrolyzed polyurethane (PUR) efficiently and hydrolysis was 94 % at 30 °C and 96 h. The products, diethylene glycol and adipic acid were quantified by HPLC and scanning electron microscopic studies of the degraded polymer showed significant increase in size of the holes from 24 to 72 h of incubation. Hydrolysis of PUR within 96 h makes the lipase novel for disposal of PUR and provides an innovative solution to the problems created by plastic wastes.

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“…Devido à possibilidade de modificações estruturais, estes possuem ampla aplicação tecnológica em várias áreas tais como: materiais de revestimento, fibras, adesivos, borrachas, espumas e plásti-cos. O mercado para produtos à base de poliuretano atingiu, em 2000, um consumo mundial da ordem de 8,5 milhões de toneladas, com previsão de 10,8 milhões em 2004; comprovando ser um dos produtos mais versáteis empregados pela indústria. Atualmente, os poliuretanos ocupam a 6 a posição, com cerca de 5% do mercado dos plásticos mais vendidos no mundo [7,[17][18][19] . No presente trabalho, foram preparados poliuretanos (PUs) segmentados utilizando poli(ε-caprolactona) diol (PCL) [14,19,[20][21][22] , um poliéster biodegradável [23][24][25][26][27][28][29] , de massa molar numérica média (Mn = 2000 g/mol) que constitui o segmento flexível; e 2,4 e 2,6 -diisocianato de tolileno, TDI.…”

Section: Introductionunclassified

“…Assim, tornou-se cada vez mais evidente a necessidade de substituir polímeros naturalmente biodegradáveis por polímeros sintéticos, que aliassem o bom desempenho mecânico à biodegradabilidade [4][5][6] . O desenvolvimento da pesquisa neste campo vem sendo feito através de dois enfoques distintos: no primeiro, são estudadas as possíveis mutações e formações de híbri-dos de microrganismos conduzindo à formação de novos genótipos (diversidade microbiológica); e no segundo, são testadas estruturas poliméricas no que se refere à biodegradabilidade, com vistas ao estabelecimento de correlações entre características estruturais do polímero e acessibilidade metabólica por parte de microrganismos (síntese de novos materiais) [7][8][9][10][11] . Neste contexto, novos polímeros biodegradáveis, como por exemplo poliuretanos, vêm sendo obtidos para aplicações inovadoras e com menor custo [12][13][14][15][16] .…”

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Correlação entre propriedades mecânicas e parâmetros estruturais de poliuretanos à base de poli(épsilon-caprolactona)

Kloss¹,

Bugay²,

Akcelrud³

et al. 2005

Polímeros

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Resumo:No presente trabalho foram preparados poliuretanos (PUs) segmentados. Primeiramente foi obtido um pré-polímero (PP) a partir da reação de 2,4 e 2,6 -diisocianato de tolileno (TDI) e poli(ε-caprolactona) diol (PCL). A PCL é um poliéster biodegradável que constituiu o segmento flexível do PU. O segmento rígido foi constituído por unidades uretânicas provenientes da ligação entre as extremidades isocianato do PP e as hidroxilas do extensor de cadeia: 1,4 -butanodiol (BDO), ou sacarose (SAC), ou glicose (GLY). Foram avaliadas as propriedades mecânicas e dinâmico-mecânicas dos poliuretanos obtidos e estas foram correlacionadas com os parâmetros estruturais. Os resultados foram justificados com base na intensidade das interações de hidrogênio, na mistura de fases, no volume dos extensores cíclicos e na presença de ligações cruzadas. Estes PUs estão sendo estudados com vistas à preparação de materiais biodegradáveis com propriedades mecânicas úteis. Palavras-chave: Poliuretano, poli(ε-caprolactona), biodegradação, propriedades mecânicas. Relationships between Mechanical Properties and Structural Parameters of Polyurethanes Containing Poly(ε ε ε ε ε-caprolactone)Abstract: Segmented polyurethanes containing polycaprolactone as soft segment were prepared taking into account the biodegradable character of this compound. The hard block was produced by the reaction between tolylene diisocyanate and a chain extender (1,4 butanediol, sucrose or glucose). The mechanical and dynamical properties were evaluated as a function of the contents of rigid blocks. The results were analyzed on the basis of the intermolecular interactions, mainly H bonds, phase mixture, volume of cyclic chain extenders and crosslinking. These polyurethanes are being studied aiming at the preparation of biodegradable materials with useful mechanical properties.

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Effect of chemical structure on the biodegradation of polyurethanes under composting conditions

Cited by 96 publications

References 17 publications

Structure analysis and thermal degradation characteristics of bio-based poly(propylene succinate)s obtained by using different catalyst amounts

Structure analysis and thermal degradation characteristics of bio-based poly(propylene succinate)s obtained by using different catalyst amounts

Utilization of fish meal and fish oil for production of Cryptococcus sp. MTCC 5455 lipase and hydrolysis of polyurethane thereof

Correlação entre propriedades mecânicas e parâmetros estruturais de poliuretanos à base de poli(épsilon-caprolactona)

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