Authors
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Burns, M. ; Wagenknecht, U. ; Kretzschmar, B. ; Focke, W. W.
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Title
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Effect of hydrated fillers and red phosphorus on the limiting oxygen index of poly(ethylene-co-vinyl actate)-poly(vinyl butyral) and low density polyethylene-poly(ethylene-co-vinyl alcohol) blends
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Date
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01.09.2008
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Number
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16057
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Abstract
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The limiting oxygen index (LOI) values of EVA-PVB and low density polyethylene (LDPE)-poly(ethylene-co-vinyl alcohol) (EVOH) polymer blends containing hydrated filler-type flame retardants and red phosphorus were measured. When used as the sole flame retardant, magnesium hydroxide [Mg(OH)2] and alumina trihydrate (ATH) performed best in EVA and PVB, respectively. Magnesium hydroxide addition had a limited effect on the LOI of plasticized PVB, and addition of red phosphorus made little difference. This result is attributed to a mismatch between the decomposition temperature of Mg(OH)2 and the temperature at which the PVB plasticizer vaporizes. Otherwise, low-level addition of red phosphorus significantly improved LOI values. The presence of hydroxyl groups on the polymer backbone had a beneficial effect with respect to LOI values in ATH-filled blends. An LOI value of 30 was achieved in EVOH with as little as 32% of ATH and 3% of red phosphorus. J. VINYL ADDIT. TECHNOL., 2008. © 2008 Society of Plastics Engineers
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Publisher
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Journal of Vinyl and Additive Technology
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Wikidata
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Citation
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Journal of Vinyl and Additive Technology 14 (2008) 113-119
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DOI
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https://doi.org/10.1002/vnl.20155
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