Poly(3-hydroxybutyrate) nanocomposites: Isothermal degradation and kinetic analysis

Erceg, Matko; Kovačić, Tonka; Klarić, Ivka

doi:10.1016/j.tca.2008.12.002

Cited by 31 publications

(29 citation statements)

References 28 publications

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“…Thermal stability studies of polymers are a matter of great interest because of the technical and commercial importance of these materials [1][2][3][4][5] with the kinetic analysis of thermal degradation playing an important role in such studies [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. A reliable evaluation of the kinetic parameters permits a theoretical interpretation of the experimental data and provides a mathematical description needed to extrapolate the reaction behaviour to conditions different from the experimental ones [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Combined kinetic analysis of thermal degradation of polymeric materials under any thermal pathway

Jiménez

Pérez‐Maqueda

Criado

2009

Polymer Degradation and Stability

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Combined kinetic analysis has been applied for the first time to the thermal degradation of polymeric materials. The combined kinetic analysis allows the determination of the kinetic parameter from the simultaneous analysis of a set of experimental curves recorded under any thermal schedule. Besides, the method does not make any assumption about the kinetic model or activation energy and allows the analysis even when the process does not follow one of the ideal kinetic models already proposed in literature. In the present paper the kinetics of the thermal degradation of both polytetrafluoroethylene (PTFE) and polyethylene (PE) have been performed. It has been concluded, without previous assumptions on the kinetic model, that the thermal degradation of PTFE obeys a first order kinetic law, while the thermal degradation of PE follows a diffusion-controlled kinetic model.

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Section: Introductionmentioning

confidence: 99%

Combined kinetic analysis of thermal degradation of polymeric materials under any thermal pathway

Jiménez

Pérez‐Maqueda

Criado

2009

Polymer Degradation and Stability

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“…A main limitation of PHAs in processing is their thermal instability 83,132 . Various strategies for improvement of thermal stability have been reported using thermal gravimetric analysis, differential scanning calorimetry and pyrolysis GC/MS 133 .…”

Section: Thermal Stabilitymentioning

confidence: 99%

“…Blending as a technique for raising the thermal stability of PHAs has been reported 133 . Incorporation of inorganic nanofillers, including LDHs and MMTs, can improve thermal stability of PHAs 11,12,64,68,78,79,132,[134][135][136][137][138][139] attributed to the dispersed silicate layers acting as a barrier to volatiles and O 2 produced during thermal decomposition 64,135,140 of PHAs. Thermal degradation of nanocomposites is affected by the degree of dispersion, because accumulation may lead to generation of local heat 68,135 .…”

Section: Thermal Stabilitymentioning

confidence: 99%

Application of Poly(hydroxyalkanoate) In Food Packaging: Improvements by Nanotechnology

Khosravi‐Darani¹

2015

Chem.Biochem.Eng.Q.

128

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The environmental impact of plastic usage is of critical concern and too great to repair. A shift toward biodegradable food packaging is one option. The aim of this review paper is the study of the potential of biodegradable materials for food packaging. The main characteristics in relation to food usage can be narrowed down to mass transfer (gas and water vapor), thermal and mechanical properties. Among several kinds of biodegradable polymers, poly(hydroxyalkanoate) is one of the favorable candidates for food packaging due to its physical and mechanical properties, biodegradability, with low permeability for O 2 , H 2 O and CO 2 without residues of catalysts and water solubility. The main focus of this article is to address poly(hydroxyalkanoate) as a potential candidate for food packaging. The need of applying biobased polymers in food packaging is presented in the introduction of this study. We also describe the most common biopolymers providing a brief overview of classification and application. This is followed by an outline of biopolymer production and a main section in which the properties of poly(hydroxybutyrate)-based nanocomposites of greatest relevance to food packaging are discussed. Furthermore, several approaches for improvement of poly(hydroxybutyrate) properties are described and the role of nanotechnology to improve its mechanical properties is presented. Finally, the article concludes with a summary as well as some possible future trends.

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“…Typically, the tendency towards clay aggregation increases as clay content increases [60]. Erceg et al [61] found that 5 % OMMT was an upper loading limit with respect to increased thermal stability when Cloisite Ò 30B was used in combination with PHB. It has been suggested that aluminium Lewis acid sites in layered silicates may catalyse hydrolysis of ester linkages and this phenomenon, contributing to PHA degradation under various conditions, could also be more pronounced at higher clay loadings [61].…”

Section: Thermal Stabilitymentioning

confidence: 99%

“…The kinetics of PHA thermal degradation in the presence of nanoclays has been studied by Erceg et al [61,66]. Other researchers have reported that a simple first-order kinetic model cannot be applied to describe isothermal degradation of PHB and PHB nanocomposites because there are likely to be a variety of different reaction mechanisms [67,68].…”

Section: Thermal Stabilitymentioning

confidence: 99%

PHA/Clay Nano-Biocomposites

Plackett

2012

Environmental Silicate Nano-Biocomposites

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Polyhydroxyalkanoates or PHAs were first observed in a laboratory in France in the 1920s and, since then, their creation as a form of energy storage in bacteria as well as their practical uses have been much studied. There has been increased interest in commercial production of PHAs in recent times and, over the past 10 years in particular, there have been various reports on solution-cast or melt-processed PHA/clay nano-biocomposites and their properties. In most studies, these nano-biocomposites exhibit intercalated or mixed exfoliated/intercalated morphologies. The use of plate-like clays as additives can lead to some enhancement in the mechanical and gas barrier properties of PHAs as well as increased thermal stability, although the effects depend significantly on clay type, clay organomodifer and process conditions. The influence of clay addition on PHA biodegradability has been either positive or negative according to the particular study. There has been very little research to date on the migration properties of PHA in the context of use in packaging and none yet in which PHA/clay nano-biocomposites have been the focus. If economic and technical challenges can be solved, PHAs should have a promising future in various uses ranging from packaging through to medicine and PHA/clay nano-biocomposites may also play a role in the future by providing a way for PHA material properties to be tuned according to the particular need.

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Poly(3-hydroxybutyrate) nanocomposites: Isothermal degradation and kinetic analysis

Cited by 31 publications

References 28 publications

Combined kinetic analysis of thermal degradation of polymeric materials under any thermal pathway

Combined kinetic analysis of thermal degradation of polymeric materials under any thermal pathway

Application of Poly(hydroxyalkanoate) In Food Packaging: Improvements by Nanotechnology

PHA/Clay Nano-Biocomposites

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