Thermal decomposition of poly(vinyl chloride) and chlorinated poly(vinyl chloride). I. ESR and TGA studies

Liebman, Shirley A.; Reuwer, J. F.; Gollatz, K. A.; Nauman, C. D.

doi:10.1002/pol.1971.150090704

Cited by 43 publications

(8 citation statements)

References 31 publications

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“…The major difference between the non-aged and aged spectral properties is the appearance of a singlet peak in the middle region in the graphs of the deteriorated samples. Similar ESR-pattern was reported during thermal degradation [16][17][18], photo degradation [19,20] or chemical dehydrochlorination [21] of PVC compound. It was also observed in the ␥-irradiated polyethylene compound sample by doses of several thousands megarads [22][23][24][25].…”

Section: Esr Resultssupporting

confidence: 75%

Electron spin resonance spectral study of PVC and XLPE insulation materials and their life time analysis

Morsy

Shwehdi

2006

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Electron spin resonance (ESR) study is carried out to characterize thermal endurance of insulating materials used in power cable industry. The presented work provides ESR investigation and evaluation of widely used cable insulation materials, namely polyvinyl chloride (PVC) and cross-linked polyethylene (XLPE). The results confirm the fact that PVC is rapidly degrades than XLPE. The study also indicates that colorants and cable's manufacturing processes enhance the thermal resistance of the PVC. It also verifies the powerfulness and the importance of the ESR-testing of insulation materials compared to other tests assumed by International Electrotechnical Commission (IEC) Standard 216-procedure, e.g. weight loss (WL), electric strength (ES) or tensile strength (TS). The estimated thermal endurance parameters by ESR-method show that the other standard methods overestimate these parameters and produce less accurate thermal life time curves of cable insulation materials.

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Section: Esr Resultssupporting

confidence: 75%

Electron spin resonance spectral study of PVC and XLPE insulation materials and their life time analysis

Morsy

Shwehdi

2006

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…The first weight loss stage within the range of 280 -300°C is mainly due to the HCl-elimination reaction of PVC and formation of a polyenes structure. 21,22 The second weight loss stage within the range of 450 -470°C is due to the thermal degradation of carbon chain of PVC that produces flammable volatiles. as the amount of the CB is increased.…”

Section: Resultsmentioning

confidence: 99%

Fusion, electrical conductivity, thermal, and mechanical properties of rigid poly(vinyl chloride) (PVC)/carbon black (CB) composites

Chen

Teng

et al. 2005

J of Applied Polymer Sci

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Rigid and conductive poly(vinyl chloride) (PVC)/carbon black (CB) composites were prepared in a Haake torque rheometer. The results illustrate that the fusion torque of the PVC/CB composite is increased as the amount of CB is increased. Both the fusion percolation threshold and the fusion time of PVC/CB composites are decreased when the amount of CB is increased. Two major weight loss stages are observed in the TGA curve of PVC/CB composite. The first thermal degradation onset temperature (T onset1 ) of PVC/CB composite is decreased as the amount of CB is increased. Both the first and second weight loss stages (⌬Y 1 and ⌬Y 2 ) of PVC/CB composites are decreased as the amount of CB is increased. The surface resistivity of PVC/CB composite remains almost constant up to 6 parts per hundred unit weight of resin (phr) CB. When the amount of CB in PVC/CB composite is increased from 6 to 15 phr, the surface resistivity of PVC/CB composite is dramatically decreased from 10 10 ⍀/sq to 10 4 ⍀/sq. Because of the addition of CB, the rigidity of PVC/CB composite is increased and thus the mechanical properties, such as yield strength, tensile strength, and the Young's modulus, are improved.

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“…The formation of a si!1glet-line ESR spectrum was also observed during ther-ma1227, 882,1364,1365,1666,1680,1989) and phot01788, 2239, 2246, 2441) degradation, and chemical dehydrochlorination 562 ) of poly(vinyl chloride).…”

Section: Esr Study Of Degradation Processes Of Polymersmentioning

confidence: 86%

ESR Spectroscopy in Polymer Research

Rånby¹,

Rabek²

1977

Polymers Properties and Applications

295

118

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Thermal decomposition of poly(vinyl chloride) and chlorinated poly(vinyl chloride). I. ESR and TGA studies

Cited by 43 publications

References 31 publications

Electron spin resonance spectral study of PVC and XLPE insulation materials and their life time analysis

Electron spin resonance spectral study of PVC and XLPE insulation materials and their life time analysis

Fusion, electrical conductivity, thermal, and mechanical properties of rigid poly(vinyl chloride) (PVC)/carbon black (CB) composites

ESR Spectroscopy in Polymer Research

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