2024 Ftir characterization of aged xlpe

Ftir characterization of aged xlpe

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WebNov 25, 1993 · This paper reports many microphysical measurements on laboratory-aged and unaged cable samples: infrared spectroscopy (FTIR), differential scanning … WebThe FTIR technique shows that the tree retardant compound (TRC) may change the composition of the tree region. Preliminary results of characterization of virgin, field aged (without trees), and treed XLPE samples with and …

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WebOct 7, 2024 · A variety of materials characterization tests were conducted on pristine, 90 ℃ thermally-only aged and simultaneously thermal (90 ℃) and gamma radiation (540 Gy/h) aged XLPE insulation materials in order to (1) identify the composition of the filled-XLPE sample material; (2) study material aging mechanisms under these exposures; and (3) … WebMar 25, 2024 · The FTIR showed the presence of carbonyl groups in aged XLPE insulation indicating that oxidation process occurred during electrical aging process. In DSC analysis, it was observed that the aging of the XLPE insulation causes a slight decrease in crystallinity that can be attributed to the molecular chain scission and oxidation. how cold is uranus f

A novel FTIR-ATR spectroscopy based technique for the …

WebThe thermal ageing increased the electrical conductivity activation energy. In the FTIR spectra, it can be seen that the intensity of carbonyl absorption peak at about 1722 cm -1 increased after thermal ageing. The carbonyl index has been calculated by the rate of peak near 1722 and 2024 cm -1 to evaluate the ageing degree of XLPE insulation ... WebSep 30, 2006 · The effects on macromolecular structure brought about by accelerated ageing in linear and crosslinked polyethylenes were detected and quantitatively monitored by using the ATR-FTIR technique. The thermo-processing conditions used in the preparation of samples with various crosslinking levels lead to the formation of by products such as … WebNov 28, 2024 · 3.2 Effect of Aging on Chemical Structure. Oxidative reaction is one mechanism of structure and property deterioration for XLPE. Figure 3 shows the IR … how cold is too cold to put on a new roof

FTIR absorption indices for thermal maturity in comparison with

FTIR characterization of aged XLPE - ScienceDirect

WebOct 1, 2006 · FTIR characterization of aged XLPE. The effects on macromolecular structure brought about by accelerated ageing in linear and crosslinked polyethylenes were detected and quantitatively monitored by using the ATR-FTIR technique. The thermo … In Fig. 3 A–C the curves of nominal stress versus strain for the samples are … The initial explanation of Benson [14] for the reduced intramolecular hydrogen … Polymer films were aged in a hot-air fan oven at 90°C. Irradiation was carried out … The radiation-enhanced infrared absorption having a maximum at ν=965 cm −1 … The sample compartment of the spectrometer was purged by dry air for … The FTIR spectrum of this stock, pre- oxidized film is shown in Fig. 1. The … Fig. 2 shows a comparison of spectroscopic changes upon the thermal oxidation at … 1.. IntroductionHigh density polyethylene (HDPE) has a melting point of … Very few papers have been published on the subject of microtomy effects in … Degradation of enhanced degradable low-density polyethylene (LDPE) (with … WebJan 1, 2002 · Important experimental parameters for FTIR spectra acquisition were studied: apodization, beam aperture, number of scans and spectral resolution, using polyethylene … how cold is to vlog for a pet rabbitWebApr 29, 2024 · The FTIR spectra of XLPE samples located at different positions are shown in Figure 7b. The absorbance is quite small and minor differences are detected between each section of unaged samples. ... Li, S. Terahertz time-domain spectroscopy characterization of aged XLPE cable insulation. In Proceedings of the International … how cold is too cold for seedlings

"Web[9] Gulmine J.V. and Akcelrud L., FTIR characterization of aged XLPE, Polymer Testing 25 (2006), 932 – 942. Google Scholar Cross Ref [10] Hao W. , Xiaoling C. , Ying H. , Xiaorong H. and Keyan X. , Modeling indicator system for evaluating environmental sustainable development based on factor analysis , Wuhan University Journal of Natural ... " - Ftir characterization of aged xlpe

Ftir characterization of aged xlpe

High‐voltage frequency domain spectroscopy analysis …

WebSome widely accepted aging characterization methods of XLPE cables such as the gel content test, differential scanning calorimetry (DSC) test, tensile test and hardness test are employed to obtain the physicochemical, mechanical and electrical properties of the samples. ... Gulmine, J.; Akcelrud, L. FTIR characterization of aged XLPE. Polym ... WebApr 10, 2024 · Figure 3 shows the FTIR curves of samples aged in air (0.1 MPa). The characteristic absorption peaks of carbonyl group (C=O) which is the mainly products of the thermo-oxidative aging can be found in this range of 1850–1650 cm −1.Since the change rules of the FTIR curves of samples aged under different pressures of aging atmosphere …

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WebFTIR parameters are especially valuable for determining the degree of maturity of marine source rocks lacking vitrinite. With increasing maturity, FTIR spectra express four trends: … WebApr 10, 2024 · Figure 3 shows the FTIR curves of samples aged in air (0.1 MPa). The characteristic absorption peaks of carbonyl group (C=O) which is the mainly products of …

WebDec 1, 2024 · Thermal oxidation is one of the main deterioration phenomena occurring during thermal aging of XLPE insulation, and the resulting major by-products are carbonyl species According to the FTIR spectra for the XLPE insulation specimens thermally aged below 135 °C, there is little changes in the FTIR spectra except in the absorption band … WebApr 15, 2024 · Gulmine, J.V.; Akcelrud, L. FTIR characterization of aged XLPE. Polym. Test. 2006, 25, 932–942. [Google Scholar] Selvamany, P.; Varadarajan, G. Estimation of …

WebOct 1, 2006 · The method of infrared spectroscopy (IR spectroscopy) is based on the study of the interaction of infrared radiation with material in the wavelength range of 2.5-25 μm … WebComparison of FT-IR absorption spectra in a wave number range 1400–2000 cm −1 measured before and after concurrent aging at 155 °C ... The present results clearly demonstrate that the carbonyl index is a good indicator of the degradation of XLPE aged purely thermally or concurrently by heat and radiation, showing a significant increase, in ...

WebThe FTIR showed the presence of carbonyl groups in both, unaged and aged XLPE insulation indicating that oxidation process occurred during the manufacturing process. ...

WebOct 1, 2006 · FTIR characterization of aged XLPE @article{Gulmine2006FTIRCO, title={FTIR characterization of aged XLPE}, author={J. V. Gulmine and Leni Campos Akcelrud}, journal={Polymer Testing}, year={2006}, volume={25}, pages={932-942} } J. V. Gulmine, L. Akcelrud; Published 1 October 2006; Materials Science; Polymer Testing how cold is too cold to put your dog outWebSep 1, 2024 · The formation of peaks in the FTIR spectra of nanocomposites at 1260 cm −1 corresponding C–C(O)–C stretch and at 800 cm −1 corresponding to C–H bending confirms chemical interaction between the organo – modifiers in nanoclay and the XLPE matrix. It can be concluded from FTIR and morphological analysis that both chemical and physical ... how cold is too cold to work outsideWebDec 1, 2012 · DOI: 10.1016/J.POLYMERTESTING.2012.07.015 Corpus ID: 96629656; A novel FTIR-ATR spectroscopy based technique for the estimation of low-density polyethylene biodegradation @article{Rajandas2012ANF, title={A novel FTIR-ATR spectroscopy based technique for the estimation of low-density polyethylene … how cold is too cold to runWebAs the aged temperature increased to 120oC, the growth rate of carbonyl index increased. As for 140oC thermal aging, the carbonyl index increased fastest. FTIR results show that, XLPE cable insulation aging is co-effect of aging time and aging factors.The molecular structure of XLPE cable insulation changed during the thermal aging process. how many points is the psat 10 out of how many points is the leqWebMay 23, 2010 · FTIR characterization of aged XLPE. Article. Oct 2006; Joseane Gulmine; Leni Akcelrud; The effects on macromolecular structure brought about by accelerated ageing in linear and crosslinked ... how cold is too cold to fishWebJun 8, 2024 · Medium and high voltage XLPE cables were widely used in urban distribution network. The electric-thermal effect of the cable conductor and water in the running environment are two important factors that cause ageing of cable insulating material. In this work, accelerated electrical test (AET) and accelerated water tree test (AWTT) on 10 kV … how many points is the green ball in snooker