Effects of metal chelates on the oxidation of polyolefins at high temperatures

Benbow, A.W.; Cullis, C. F.; Laver, H.S.

doi:10.1016/0032-3861(78)90012-5

Cited by 21 publications

(7 citation statements)

References 16 publications

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“…This can explain the dual behavior of SA‐based chelates as both inhibitors and catalysts. A mechanism similar to this has been suggested in the discussion of the behavior of oxime‐based chelates as oxidation inhibitors 23…”

Section: Resultsmentioning

confidence: 59%

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A Novel Intumescent Flame‐Retardant Polyethylene System

Xie

Wang

Zhang

et al. 2006

Macro Materials & Eng

154

107

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Summary: A novel carbonization agent was synthesized and characterized. The flame retardancy and thermal behavior of a new IFR system with and without metal chelates for LDPE were investigated by LOI, UL‐94 test, and TGA. Metal chelates can remarkably improve the flame retardant performance of intumescent systems according to the tested results of LOI values and UL‐94 ratings because they can act both as inhibitors of radicals and as promoters of carbonization. The TG curves show that the amounts of residue of IFR‐PE/metal chelate systems increase compared to those of PE and IFR‐PE at temperatures ranging from 400 to 650 °C. The IFR‐PE/metal chelate system can obviously reduce the amounts of decomposing products at higher temperatures and promotes the formation of carbonaceous charred layers. A LOI value of 29.8 and UL‐94 V‐0 rating could be achieved when the synthesized carbonization agent, APP, MP, and CoOSA were added into LDPE.TG curves of PE, IFR‐PE, and IFR‐PE/metal chelate systems.magnified imageTG curves of PE, IFR‐PE, and IFR‐PE/metal chelate systems.

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Section: Resultsmentioning

confidence: 59%

“…Some metal chelates are known to affect the initial stage of polymer degradation 20–22. It has been proposed that metal chelates convert alkylperoxy radicals to more stable species 23. They strongly affect the extent of carbon formation from and of oxygen uptake by PP as a result of reactions occurring mainly in the condensed phase 15…”

Section: Introductionmentioning

confidence: 99%

A Novel Intumescent Flame‐Retardant Polyethylene System

Xie

Wang

Zhang

et al. 2006

Macro Materials & Eng

154

107

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“…Section 5.14) and is due to the ability of these compounds to reduce alkylperoxy radicals with the simultaneous formation of stabilized phenoxy radicals: 170 The bispyrazole (5.84) has a thermally unstable N-N bond which, on heating, decomposes to form pyrazolyl radicals (5.83). Section 5.14) and is due to the ability of these compounds to reduce alkylperoxy radicals with the simultaneous formation of stabilized phenoxy radicals: 170 The bispyrazole (5.84) has a thermally unstable N-N bond which, on heating, decomposes to form pyrazolyl radicals (5.83).…”

Section: Metal Saucylate Chelatesmentioning

confidence: 99%

Photostabilization of Polymers

Rabek¹

1990

140

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“…Certain metal chelates are known to affect the initial stage of polymer degradation and especially the oxygen uptake reaction [5,6]. Metal chelates can act as inhibitors and as promoters of carbonization through catalyzing char formation, and are effective condensed-phase flame retardants [7].…”

Section: Introductionmentioning

confidence: 99%