An investigation of the thermal degradation of poly(ethylene glycol)

Voorhees, Kent J.; Baugh, Steven F.; Stevenson, Douglas N.

doi:10.1016/0165-2370(94)00803-5

Cited by 73 publications

(59 citation statements)

References 12 publications

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“…This, along with oxygen present in the immediate atmosphere, appears to be sufficient to enable complete combustion of carbon via the reactions discussed above. This mechanism is consistent with observations of pyrolysis of PEG (of varying molecular weights) by mass spectrometry, where at lower temperatures homolytic cleavage of C-O bonds occurs during the onset of pyrolysis, followed by homolytic cleavage of C-C bonds at higher temperatures [38,39]. The ratio CO(g)/CO2(g) is a strict function of the residual O2(g) pressure in the system, and consequently by altering this pressure it is possible to manipulate the extent of combustion.…”

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confidence: 75%

Synthesis of stoichiometrically controlled reactive aluminosilicate and calcium-aluminosilicate powders

et al. 2016

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supporting

confidence: 75%

Synthesis of stoichiometrically controlled reactive aluminosilicate and calcium-aluminosilicate powders

et al. 2016

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“…This observation confirms that the high temperature annealing causes loss of a significant amount of carbonaceous materials, from PEG-6000, in line with its decomposition profile which is generally held to involve the loss of short oligomers. 24,25 Much of the fluoride is also lost as the conversion from NH4TiOF3 MCs to TiO2 MCs proceeds, although some fluoride remains even after extended heating. This XPS data, in conjunction with the structural data (vide infra), indicates that the optimal duration of annealing at 450 o C is around 4 hours.…”

Section: Resultsmentioning

confidence: 99%

New insights into polymer mediated formation of anatase mesocrystals

et al. 2017

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“…The evolved gas in the neat PEO revealed the existence of a wide range of ion fragments: m/z ion peaks appear at 12, of PEO is known to proceed via random-chain scission of C-O bonds and C-C bond cleavage, [14][15][16] leading to the formation of a series of molecules such as mono and diether oligomers, ethylene glycol, diethylene glycol, 1,3 dioxolane, 2-methoxy-1,3 dioxolane, methyl vinyl ether, ethyl vinyl ether, 2-butenal, 17,18 and also furan, oxalic acid, ethylene oxide, and oxymethylene species. 14 The fragment ions observed in the MS profiles would correspond to these species and to their fragmented products.…”

Section: Dynamic Experiments Peo/go Intercalation Compoundmentioning

confidence: 99%

Thermal Stability of Polymers Confined in Graphite Oxide

et al. 2013

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In this study, polymer-graphite oxide (GO) interactions are demonstrated to induce thermal instability in both the polymer and GO phase in conditions of maximum polymer uptake, in which the polymer chains are either intercalated into the GO interlayer or adsorbed on the GO sheets. We investigate the thermal stability of poly(ethylene oxide) (PEO) intercalated in GO (PEO/GO) in detail, using a combination of techniques including X-ray diffraction (XRD), thermogravimetry (TGA) and TGA-Mass Spectroscopy (TGA-MS) in dynamic (nonisothermal) and static (isothermal) modes. Our results show that intercalated PEO decomposes at 160 • C lower than neat PEO, and that GO decomposes at 50 • C lower than pristine GO, due to a synergistic instability between GO and intercalated PEO upon heating. Other hydrophilic polymers-such as poly(vinyl methyl ether) (PVME), poly(vinyl alcohol) (PAA), poly(vinyl pyrrolidone) (PVP) and poly(acrylic acid) (PAA)-forming polymer-adsorbed GO structures are also observed to decompose at noticeably lower temperatures than either pristine GO or their own corresponding neat polymers. Unlike PEO/GO intercalation compounds, the excess of PEO phase in PEO-GO composites decomposes at temperatures close to that of neat PEO, which demonstrates that those polymer chains far from the adsorbing GO surface are not significantly affected by the presence of GO sheets. Furthermore, isothermal TGA data for PEO/GO intercalation compounds with PEO chains from 5 to 2135 monomeric units are well described by an autocatalytic model similar to that we found for pristine GO in a previous study, which suggests that the overall decomposition of PEO/GO is dominated by the reduction and exfoliation of GO. However, when PEO is adsorbed on graphene substrate, which is thermally stable at the studied temperatures, the kinetic mechanisms follow a first-order reaction similar to neat PEO, but the decomposition occurs with a considerably lower activation energy.

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An investigation of the thermal degradation of poly(ethylene glycol)

Cited by 73 publications

References 12 publications

Synthesis of stoichiometrically controlled reactive aluminosilicate and calcium-aluminosilicate powders

Synthesis of stoichiometrically controlled reactive aluminosilicate and calcium-aluminosilicate powders

New insights into polymer mediated formation of anatase mesocrystals

Thermal Stability of Polymers Confined in Graphite Oxide

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