Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems

Richaud, Emmanuel; Fayolle, Bruno; Verdú, J.; Rychlý, Jozef

doi:10.1016/j.polymdegradstab.2013.01.008

Cited by 27 publications

(16 citation statements)

References 29 publications

(47 reference statements)

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“…This fact can explain the HDPE soaked in E30 had less volume and mass change than soaked in gasoline, as shown in Figures 2 and 3. Similar test results were also found by Berlanga-Labari et al 5 Biodiesel itself is subject to an aging process by the formation of unsaturated fatty acids, which can accelerate the oxidative degradation of HDPE, 12 but there was no significant difference between diesel and B30, as shown in Figures 2 and 3. Similar test results were also found by Thompson et al 8 A possible explanation for this result is that more fuel absorption than oxidative damage occurs between HDPE and diesel and B30, but this fuel absorption was significantly weaker than gasoline and E30.…”

Section: Resultssupporting

confidence: 86%

Compatibility study of high-density polyethylene with ethanol–gasoline and biodiesel

Jiangfang

Xuehong

2019

Journal of Elastomers & Plastics

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To further evaluate the compatibility of high-density polyethylene (HDPE) with the biofuels included ethanol–gasoline E30 and biodiesel B30, especially the change of mechanical properties of HDPE over soaking time, soaking tests were performed in E30 and B30 fuels at 45°C for 1608 h. Volume/mass change, yield stress, yield elongation, and impact strength of HDPE were measured at different soaking times. In all fuel soaking tests, more fuel absorption occurred between HDPE and fuels than oxidative damage. Due to higher polarity of bioethanol, E30 is less easily absorbed by HDPE than gasoline and causes less volume and mass change of HDPE. Compared with gasoline and E30, diesel and B30 were less likely to be absorbed by HDPE and there was no significant different of HDPE volume and mass change soaked in them. As fuel could be more easily stored in the amorphous phase of the HDPE than in the crystalline phase, the significant increase of yield elongation and little change of yield stress and the absorbed fuel may act as a plasticizer in HDPE. The increase of impact strength was due to the HDPE became more ductile after fuel soaking rather than strength increase. The compatibility research between HDPE and biofuel can help design engineers to evaluate the performance changes of plastic fuel tank products made of HDPE after long-term fuel soaking.

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Section: Resultssupporting

confidence: 86%

Compatibility study of high-density polyethylene with ethanol–gasoline and biodiesel

Jiangfang

Xuehong

2019

Journal of Elastomers & Plastics

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“…These energy values are in good agreement with several reported figures [57,[61][62][63]. The main process on which the calculation of activation energy was based concerns the conversion of hydroperoxides into final products according to the radical mechanism of the oxidation of polyolefins.…”

Section: Chemiluminescence (Cl)supporting

confidence: 90%

Durability of LDPE/UHMWPE Composites under Accelerated Degradation

Zaharescu¹,

Râpă²,

Blanco

et al. 2020

Polymers

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This study presents a detailed analysis of thermal and radiation resistances of low density polyethylene (LDPE)/ultra-high molecular weight polyethylene (UHMWPE) blends containing hydroxyapatite as functional filler and rosemary acting as antioxidant against oxidative degradation. Three main procedures, chemiluminescence (CL), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC), were applied for the determination of the degree of degradation when these materials are subjected to heat and radiation action. The crystallinity was also assessed for the characterization of diffusion peculiarities. The contributions of the mixing components are discussed based on their oxidation strength. The activation energies required for the oxidative degradation of the studied formulations were calculated.

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“…However, the full understanding of the relative rates of oxidation product formation (formates, carbonyls and amides in DGEBA-DDS for example e see Fig. 13) and the interplay with them remains an open takes requiring, for example, the use of a co-oxidation kinetic model [38].…”

Section: On the Relative Reactivity Of Each Sitementioning

confidence: 99%

Thermal oxidation of aromatic epoxy-diamine networks

Delozanne

Desgardin

Cuvillier

et al. 2019

Polymer Degradation and Stability

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The thermal oxidation of DGEBA-DDS (bisphenol A diglycidyl ether þ 4,4 0-diaminodiphenyl sulfone) and TGMDA-DDS (4,4 0-methylenebis(N,N-diglycidylaniline) þ 4,4 0-diaminodiphenyl sulfone) was performed at 80, 120, and 200 C and was monitored by FTIR. Oxidation was shown to generate amides and carbonyls. Comparisons were done with model systems displaying some common reactive groups, which highlighted the predominating role of methylene in a position of ether in DGEBA-DDS and methylene in a position of nitrogen hold by TGMDA in TGMDA-DDS. The participation of CH 2 in a position of DDS hardener group seems to depend on the temperature and decrease when lowering it. The oxidation of such complex systems must hence be described by a co-oxidation model where each kind of reactive sites is described by its own set of kinetic constants.

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Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems

Cited by 27 publications

References 29 publications

Compatibility study of high-density polyethylene with ethanol–gasoline and biodiesel

Compatibility study of high-density polyethylene with ethanol–gasoline and biodiesel

Durability of LDPE/UHMWPE Composites under Accelerated Degradation

Thermal oxidation of aromatic epoxy-diamine networks

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