Thermal chemiluminescence of fibrous proteins

Millington, Keith R.; Maurdev, George; Jones, Michael

doi:10.1016/j.polymdegradstab.2007.05.014

Cited by 10 publications

(5 citation statements)

References 40 publications

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“…In temperature ramp experiments on cellulose in N 2 the hydroperoxide CL peaks at a temperature of w135 C and its onset is at w90 C [6]. Similar peaks near 135 C have been observed for other polymers in N 2 , including fibrous proteins [7].…”

Section: Introductionsupporting

confidence: 72%

The effect of dyes on photo-induced chemiluminescence emission from polymers

Millington

Zhang

Jones

et al. 2010

Polymer Degradation and Stability

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Section: Introductionsupporting

confidence: 72%

The effect of dyes on photo-induced chemiluminescence emission from polymers

Millington

Zhang

Jones

et al. 2010

Polymer Degradation and Stability

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“…It is suggested that that the presence of benzene radicals as a thermal degradation products for octaphenyl‐POSS [54] may have negatively affected the kinetics of degradation and oxidation for MXD6. The chemiluminescence technique which can be used to study free radical reactions in polymers [55] is currently being used to provide insight into the thermal degradation mechanisms of MXD6 in the presence of dodecaphenyl‐POSS. The results will be the subject of a future publication.…”

Section: Resultsmentioning

confidence: 99%

Nanocomposites of poly(m‐xylene diamide) with polyhedral oligomeric silsesquioxane, montmorillonite, and their combination: Structure and properties

Magniez

Fox

Looney

2012

Polymer Engineering & Sci

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In this work, nanocomposites of poly (m-xylene diamide) (MXD6) with dodecaphenyl polyhedral oligomeric silsesquioxane (POSS), montmorillonite (MMT) and their combination (MMT-POSS) were produced by meltcompounding and their structure-property relationships were established. The montmorillonite was found to be homogeneously dispersed affording intercalated disordered structures whilst the distribution and dispersion of the POSS was rather skewed with the presence of phase separated crystalline aggregates of up to several hundred nanometers. Significant differences in properties were observed depending on the type of nanoscale filler present in the nanocomposites. The montmorillonite provided some improvements in stiffness and dynamic response of MXD6. POSS on the other hand improved the ductility of MXD6 and had a plasticizing effect. It has been suggested that there might be a lubricating action at the interface inducing better molecular motion between polymer chains of MXD6. By combining MMT and POSS, the properties of the corresponding nanocomposites were found to be intermediate. The thermal stability of MXD6 was enhanced in the nanocomposites although a negative deviation from the theoretical model was observed when POSS was present in the nanocomposites. This observation underlies some antagonistic effects which have been attributed to the presence of catalytic benzene radicals during thermal degradation. POLYM. ENG.

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“…In both proteinaceous and cellulosic materials, this peak is associated with peroxide content [14,16], the peroxides having been introduced during the 2-h pre-oxidation at 80 o C in oxygen. It is evident that the peak, and CL emission in general, is higher in the sample emitting more carbonyl compounds.…”

Section: Resultsmentioning

confidence: 99%

“…Abrusci et al studied chemiluminescence of gelatine and showed that light emission depends on the content of hydrogen peroxide, on macromolecular mobility and on the bloom value [15]. Millington et al, on the other hand, focussed primarily on wool proteins, but also used collagen and a number of amino acids for comparison [16]. Both found similar CL phenomena in N 2 and O 2 atmospheres, and the dependence of CL on the glass transition temperature, T g .…”

Section: Introductionmentioning

confidence: 99%

Autoxidation of lipids in parchment

Strlič

Cigić

Rabin

et al. 2009

Polymer Degradation and Stability

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Historic parchment is a macromolecular material, which is complex due to its natural origin, inhomogeneity of the skin structure, unknown environmental history and potential localised degradation. Most research into its stability has so far focussed on thermal and structural methods of analyses.Using gas-chromatographic analysis of the atmosphere surrounding parchment during oxidation, we provide the experimental evidence on the production of volatile aldehydes, which can be the products of lipid autoxidation. Oxidation of parchment with different aldehyde emissions was additionally followed in situ using chemiluminometry and the same techniques were used to Building on this evidence, we can conclude that the presence of lipids (either initially present in the skin or resulting from conservation intervention) leads to oxidative degradation of collagen and that the non-destructive analysis of the emission of volatiles could be used as a quick tool for evaluation of parchment stability.

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Thermal chemiluminescence of fibrous proteins

Cited by 10 publications

References 40 publications

The effect of dyes on photo-induced chemiluminescence emission from polymers

The effect of dyes on photo-induced chemiluminescence emission from polymers

Nanocomposites of poly(m‐xylene diamide) with polyhedral oligomeric silsesquioxane, montmorillonite, and their combination: Structure and properties

Autoxidation of lipids in parchment

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