Thermal decomposition of biodegradable polyesters—I: Poly(β-hydroxybutyric acid)

Kopinke, Frank‐Dieter; Remmler, M.; Mackenzie, Kenneth D.

doi:10.1016/0141-3910(95)00221-9

Cited by 161 publications

(151 citation statements)

References 16 publications

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“…According the literature maximum degradation temperature characteristic for PHBs is 290 °C [30] . Thermal degradation of polyesters has been accepted as occurring by intramolecular ester exchange …”

Section: Resultsmentioning

confidence: 99%

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Biodegradation evaluation of bacterial cellulose, vegetable cellulose and poly (3-hydroxybutyrate) in soil

et al. 2015

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Section: Resultsmentioning

confidence: 99%

“…(transesterification) and cis-elimination, but most results has been indicated that PHB decomposes according to cis-elimination mechanism [30] . In the same way as for the standard cellulose and bacterial, there is small change in the thermal stability of the material.…”

Section: Biodegradation Evaluation Of Bacterial Cellulose Vegetable mentioning

confidence: 99%

Biodegradation evaluation of bacterial cellulose, vegetable cellulose and poly (3-hydroxybutyrate) in soil

et al. 2015

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“…230°C to 270°C depending on the heating rate (3, 5, 7, 10°C/min) [42]. Kopinke et al (1996) report a thermal decomposition of pure PHB samples within a 235-305°C temperature range and show that biomass impurities originate P(3HB) samples with lower thermal stabilities [43]. In the present work, thermogravimetric analyses were conducted under an air flow and not under an inert atmosphere as most works report.…”

Section: Extracted Polymer Characterizationmentioning

confidence: 99%

Efficient P(3HB) extraction from Burkholderia sacchari cells using non-chlorinated solvents

Rosengart

Cesário

Almeida

et al. 2015

Biochemical Engineering Journal

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A technique for poly-3-hydroxybutyrate (P(3HB)) extraction with safer, non-chlorinated solvents, was developed, aiming to attain high recovery yields and purities. A wide range of solvents was selected from the GlaxoSmithKline guide as sustainable industrial solvents and the solubility of P(3HB) on those solvents calculated using predictive equations from literature. Anisole, * Corresponding author: Tel.: +351 21 8419137; Fax: +351 21 8419062. e-mail address: teresa.cesario@tecnico.ulisboa.pt + Current address: Politecnico di Milano, Dipartimento di Chimica Materiali e Ingegneria Chimica "Giulio Natta". Via Mancinelli, 7 -20131 Milano MI 2 cyclohexanone and phenetole were used as extraction solvents and the relevant process variables (extraction temperature, extraction time and mass of cells/solvent volume ratio) were optimized.Polymer recovery yields of 97% and 93% were obtained with anisole and cyclohexanone, respectively, at 120-130°C using a cell/solvent ratio of 1.5% (w/v). Maximum polymer purities using these experimental conditions were 98% for both solvents. Recovery yields and polymer purity attained with chloroform (reference solvent) were 97 and 98%, respectively. Higher cell/solvent ratios of 6.0 % (w/v) showed slightly lower recovery yields and purities The average molecular weight and the thermal properties of the polymers extracted with the alternative solvents were comparable to those of the polymers obtained by chloroform extraction, showing that the applied conditions did not significantly alter the properties of the extracted P(3HB).

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“…The decomposition of 1:1 willow/PHB at 545 K is 2 The formation of crotonic acid during the thermal degradation of pure PHB has already been observed in the evolving pyrolytic gases and is discussed in literature [17][18][19][20]24].…”

Section: Resultsmentioning

confidence: 99%

“…It can be degraded to water and carbon dioxide under environmental conditions by a variety of bacteria, and shows much potential for its application as an environmentally degradable plastic [16]. The thermal decomposition of PHB has already been studied in detail analytically with the aid of TGA, DSC, Py-MS, Py-GC/MS, and Py-GC-FTIR [17][18][19][20]. However, (flash) pyrolysis experiments on PHB combined with subsequent condensation of the condensable pyrolytic gasses produced, has, according to the knowledge of the authors, never been reported.…”

Section: Introductionmentioning

confidence: 99%

Flash co-pyrolysis of biomass with polyhydroxybutyrate: Part 1. Influence on bio-oil yield, water content, heating value and the production of chemicals

Cornelissen

Jans²,

Yperman

et al. 2008

Fuel

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Bio-oil obtained via flash pyrolysis shows potential to be applied as a renewable fuel. However, bio-oil often contains high amounts of water, which is a major drawback for its application. The influence of a biopolymer -polyhydroxybutyrate (PHB) on the pyrolysis of willow is investigated using a semicontinuous home-built pyrolysis reactor. The flash co-pyrolysis of willow/PHB blends (w/w ratio 7:1, 3:1, 2:1 and 1:1) clearly shows particular merits: a synergetic increase in pyrolysis yield, a synergetic reduction of the water content in bio-oil, an increase in heating value, and a production of easily separable chemicals. The occurrence of synergetic interactions is observed based on a comparison between the actual pyrolysis results of the willow/PHB blends, the theoretical pyrolysis results calculated from the reference pyrolysis experiments (pure willow and pure PHB) and their respective w/w ratio. The co-pyrolysis of 1:1 willow/PHB shows the best overall results.

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Thermal decomposition of biodegradable polyesters—I: Poly(β-hydroxybutyric acid)

Cited by 161 publications

References 16 publications

Biodegradation evaluation of bacterial cellulose, vegetable cellulose and poly (3-hydroxybutyrate) in soil

Biodegradation evaluation of bacterial cellulose, vegetable cellulose and poly (3-hydroxybutyrate) in soil

Efficient P(3HB) extraction from Burkholderia sacchari cells using non-chlorinated solvents

Flash co-pyrolysis of biomass with polyhydroxybutyrate: Part 1. Influence on bio-oil yield, water content, heating value and the production of chemicals

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