Review of polymer oxidation and its relationship with materials performance and lifetime prediction

Celina, Mathias C.

doi:10.1016/j.polymdegradstab.2013.06.024

Cited by 384 publications

(225 citation statements)

References 98 publications

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“…significantly lower than for epoxies [32] or unsaturated polyesters [13]. Besides this practical point, it confirms that oxidation is not controlled by diffusion for discussing all the above presented results and extracting reliable kinetics parameters [8].…”

Section: On the Oxidizability Of Pdcpd And The Influence Of Oxygen DIsupporting

confidence: 77%

“…Comparisons will often be done with polybutadiene which has a comparable double bonds concentration but being aged and used in its rubbery state. Last, particular attention will be addressed to the existence of Diffusion Limited Oxidation (DLO) [8] so as to extract reliable kinetic parameters (i.e. only when samples are not subjected to DLO effects).…”

Section: Introductionmentioning

confidence: 99%

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Kinetic analysis of polydicyclopentadiene oxidation

Defauchy

Gac

Guinault

et al. 2017

Polymer Degradation and Stability

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. b s t r a c tThe in situ thermal oxidation of thin unstabilized polydicyclopentadiene was studied by TGA to monitor mass gain, and DSC to characterize hydroperoxides concentration. Results were discussed using kinetic analysis, which allowed the estimation of activation energies for key reactions of the oxidation process. Activation energy for termination was shown to be higher than in hydrocarbon liquids, which was discussed from the theory of diffusion controlled reactions, and a possible link with local motions associated with sub-glassy transition. Activation energy of thermal decomposition of hydroperoxides was found lower than for model hydroperoxides, suggesting an accelerating effect of organometallic catalysts. Despite those two results that indicate a poor thermal stability of thin pDCPD films, measurements of oxygen diffusivity at several temperatures show that oxidation remains confined in a relatively thin surface layer which would allow the pDCPD properties to be preserved.

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Section: On the Oxidizability Of Pdcpd And The Influence Of Oxygen DIsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Kinetic analysis of polydicyclopentadiene oxidation

Defauchy

Gac

Guinault

et al. 2017

Polymer Degradation and Stability

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“…Both the thermo-oxidative [46] and the photooxidative [47] aging processes of all three materials proceed via radicals and can be described as part of the autoxidation process. [48,49] After the rate determining step of bond dissociation, radicals are formed that can react with themselves (leading to crosslinking or via disproportionation to the formation of C=C double bonds).…”

Section: Colour Measurementsmentioning

confidence: 99%

Contaminant release from aged microplastic

et al. 2017

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Environmental context. Increasing global plastic production adds plastic debris to the environment. We show that potentially harmful additives present in plastic particles are released to water at an increased rate when material properties change by aging due to exposure to high temperature and especially to UV radiation. For risk assessment of such plastic additives, more information on their degradation products and their toxicity is needed.Abstract. Recycled plastic granules of high-density polyethylene, polyvinyl chloride and polystyrene the size of microplastics were exposed to artificial aging conditions (2000 h; photooxidative and thermo-oxidative) to simulate their fate outdoors. Their potential to leach into water during the aging process was investigated using column percolation tests. Aging-related changes on the surface of the material were characterised by IR measurements indicating oxidation reactions with the formation of new adsorption bands (C=O, C-O and OH), especially in the case of photooxidative aging. These findings were confirmed by the identification of leachable organic compounds. Leaching of total organic carbon, Cl, Ca, Cu and Zn is clearly affected by changes due to aging, and their release is increased after photooxidative aging. In general, exposure to photooxidative conditions shows a greater influence on aging and thus on leaching and seems to be the more important mechanism for the aging of microplastic in the environment. Comparison with the total content of inorganic species revealed that, for most elements, less than 3% of the total content is released after 2000 h of photooxidative aging.

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“…Even for collectors of vintage plastics 'patina' is now considered evidence of authenticity and originality [18]. However, unlike surface patinas on metals which provide a protective layer, the 'patina' on the surface of plastics is indicative of chemical degradation such as oxidation, which once initiated on the surface will proceed via a chain reaction into the bulk of the polymer [37]. In museums, objects attain a heritage status as their use changes from mechanical/functional to display, and aesthetic properties may take priority over mechanical.…”

Section: Materials Properties and Degradationmentioning

confidence: 99%

Preserving rapid prototypes: a review

et al. 2016

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Rapid Prototyping (RP) has revolutionized the world of manufacturing. It has gained popularity among designers and artists, having developed from a visualization tool to a manufacturing tool for end-use products. Rapid-prototyped objects are being accessed by museums and the technology is being adopted for conservation applications. The review identifies the current most commonly used polymer based RP technologies and materials that are likely to enter museum collections, and formulates informed research topics related to their conservation. A knowledge exchange project was conducted with artists and designers using the technology via an online survey and interviews. The main technologies and materials used by artists and designers were identified and investigated including research that has been done into the stability of RP manufactured objects. Since these may be uniquely postprocessed by artists and designers, RP objects are often irreplaceable, i.e. cannot simply be reprinted. The evolution from rapid prototyping (RP) to additive manufacturing (AM) has resulted in extensive research into the mechanical properties and short-term stability of prototypes. However, very little research has been conducted into RP from the conservation perspective particularly long-term stability studies. Since RP technology is rapidly developing, it is crucial that conservators and scientists follow and inform these developments.

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Review of polymer oxidation and its relationship with materials performance and lifetime prediction

Cited by 384 publications

References 98 publications

Kinetic analysis of polydicyclopentadiene oxidation

Kinetic analysis of polydicyclopentadiene oxidation

Contaminant release from aged microplastic

Preserving rapid prototypes: a review

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