Influence of thermal oxidation on surface and thermo-mechanical properties of polyethylene

Suresh, Balasubramanian; Maruthamuthu, S.; Khare, Alika; Palanisamy, Nachimuthu; Muralidharan, V.S.; Ragunathan, R.; Kannan, Murugasamy; Pandiyaraj, K. Navaneetha

doi:10.1007/s10965-011-9628-0

Cited by 73 publications

(48 citation statements)

References 24 publications

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“…A number of observations of the morphology change due to the light/temperature or electrical field [6][7][8][9][10] have been performed. One has to be aware that significant variations of certain properties due to the local inhomogeneities of material can become an obstacle during the measurements while the abovementioned methods are utilized.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the impact of simulated solar radiation on the micro- and nanoscale morphology and mechanical properties of a sheet moulded composite surface

Sikora

Bednarz

Fałat

et al. 2016

Materials Science-Poland

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In this paper we present the results of investigation of micro-and nanoscale degradation of a sheet moulded composite exposed to simulated solar radiation. Utilization of high resolution methods such as atomic force microscopy, optical profilometry and microcomputer tomography allowed us to provide the evidence of significant deterioration of the surface as well as the material few microns in depth. Additionally, the typically used macroscopic investigations, such as wettability and flexural strength, were performed to observe the impact of weathering process. It was also shown that high resolution techniques provide superior sensitivity of the material degradation detection. The particular effectiveness of the applied approach was related to the structure of investigated material, as due to its degradation, a number of voids appeared, causing a significant roughness increase. In addition, the impact of light radiation could be compared to other environmental conditions maintained in the climatic chamber. It should be underlined, that according to our knowledge, such a study has not been performed so far.

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Section: Introductionmentioning

confidence: 99%

Investigation of the impact of simulated solar radiation on the micro- and nanoscale morphology and mechanical properties of a sheet moulded composite surface

Sikora

Bednarz

Fałat

et al. 2016

Materials Science-Poland

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“…For this reason, the oxidizing ability of the acetylacetonates used was studied by For both the films of initial irradiated HDPE and the materials based on it containing transition metals acetylacetonates, changes were observed after UV irradiation in all the IR ranges mentioned above. The intensities of these peaks increased as a result from the irradiation (Figure 1 b) which proved the formation of various oxidation products 1,12,15 . The better photooxidizing ability of pro-oxidant Mn(aсaс) 2 was proved by the carbonyl index determined.…”

Section: Resultsmentioning

confidence: 84%

“…The reactions shown above lead to fast accumulation of hydroperoxides and, simultaneously, to formation of oxidation products with low molecular weight [13][14][15][16] . The aim of the present work is to obtain photodestructing foils on the basis of high density polyethylene by addition of organic complexes of transition metals as pro-oxidants into them.…”

Section: Introductionmentioning

confidence: 99%

Effect of Metal Acetylacetonates on the Photooxidative Destruction of High Density Polyethylene

2016

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The process of photooxidative destruction of high density polyethylene films containing different organic complexes of polyvalent metals as pro-oxidant additives after UV-irradiation was studied. During exposure to UV-irradiation, the more significant changes in the mechanical and thermal properties were detected for the foils containing pro-oxidant additives compared to initial high density polyethylene. This indicated for the higher degree of oxidation in these samples and confirmed the effectiveness of thеsе additives in promoting the oxidation of high density polyethylene during UV-irradiation. It was found that the decrease of the strength of the initial high density polyethylene foils was more pronounced for the samples with pro-oxidants cobalt (III) acetylacetonate and manganese (II) acetylacetonate. The use of 2 mmol/kg iron (III) acetylacetonate and 4 mmol/kg cobalt (III) acetylacetonate as pro-oxidants gave the highest decrease of elongation at break of the polyethylene foils.

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“…This particular advantage was utilized number times in the investigation of the surface deterioration due to exposition to a certain media. The impact of the UV light [3][4][5][6][7], simulated solar radiation [8], high voltage [9], complex environmental conditions [10] increased temperature [11,12] and others [13][14][15] was investigated, allowing to observe the topography changes indicating the intensity of the materials response. Also the changes of the mechanical properties at nanoscale were reported as the result of the environmental conditions [3,7] or local, nanoscale wear [16].…”

Section: Introductionmentioning

confidence: 99%

“…One can notice that the common practice is the assumption that micrometer scale measurements acquired in various areas of the sample will be representative for whole specimen. Therefore in many works, single or very few measurements were used to calculate the roughness changes [5,8,[10][11][12][13]. Among few works investigating the degradation process, and showing the gradual roughness changes, one could notice rather monotonic behavior, visible as the increase of S a or S q parameters [13,[19][20].…”

Section: Introductionmentioning

confidence: 99%

High Accuracy and Sensitivity Method of the Observation of the Surface’s Morphology Changes by Means of Atomic Force Microscopy with Cyclic, Precise Sample Positioning

Sikora¹

2017

NSNM

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Abstract:The submicron changes of the morphological properties of the surface can provide one of the earliest indications of the degradation of the material due exposition to a certain media. Atomic force microscopy, as the tool delivering 3D quantitative imaging of the surface with ultimate resolution, is successfully utilized in the detection of the materials degradation. Yet, a several issues such as the materials non-homogeneity and the presence of the morphological artifacts must be taken into account in terms of the reliability of obtained data, while their presence in the scanned area may cause a significant deviation of the measurement outcome from the values being representative to the condition of the investigated material. In this paper the approach based on the precise sample positioning at each stage of the verification of the deterioration progress is presented. This novel method allows to acquire the information with unique sensitivity and high degree of confidence. Moreover, the observation of the morphology changes at several spots with high receptivity enables determination of the homogeneity of the deterioration, which may play essential role in case of investigation of behavior of complex materials (containing additives or fillers), in particular nanomaterials. A set of experimental results acquired on the polycarbonate and polyethylene samples is here presented, revealing the efficiency of presented approach and its advantages over the commonly applied methods.

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Influence of thermal oxidation on surface and thermo-mechanical properties of polyethylene

Cited by 73 publications

References 24 publications

Investigation of the impact of simulated solar radiation on the micro- and nanoscale morphology and mechanical properties of a sheet moulded composite surface

Investigation of the impact of simulated solar radiation on the micro- and nanoscale morphology and mechanical properties of a sheet moulded composite surface

Effect of Metal Acetylacetonates on the Photooxidative Destruction of High Density Polyethylene

High Accuracy and Sensitivity Method of the Observation of the Surface’s Morphology Changes by Means of Atomic Force Microscopy with Cyclic, Precise Sample Positioning

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