PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPE

To prepare expandable graphite (EG) with high anti-flame property for Linear low density polyethylene (LLDPE), dosages of oxidant KMnO4, intercalation reagent H2SO4 and ancillary intercalation reagent Na4P2O7 were optimized during oxidation intercalation reaction of natural graphite. EG with an init...

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Autores principales:	PANG,X. Y, SONG,M. K, TIAN,Y, DUAN,M. W
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2012
Materias:	Expandable graphite Dilatability Sodium pyrophosphate Flame retardancy LLDPE Mechanism
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000300026
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spelling	oai:scielo:S0717-970720120003000262019-02-19PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPEPANG,X. YSONG,M. KTIAN,YDUAN,M. W Expandable graphite Dilatability Sodium pyrophosphate Flame retardancy LLDPE Mechanism To prepare expandable graphite (EG) with high anti-flame property for Linear low density polyethylene (LLDPE), dosages of oxidant KMnO4, intercalation reagent H2SO4 and ancillary intercalation reagent Na4P2O7 were optimized during oxidation intercalation reaction of natural graphite. EG with an initiation expansion temperature of 148 ± 2 °C and expansion volume of 550 mL/g can be prepared according to the mass ratio of C:KMnO4:H2SO4(98%):Na4P2O7 = 1.0:0.4:5.0:0.6 (H2SO4 should be diluted to the mass concentration of 80% before intercalation reaction), the reaction time is 40 min at constant 40 °C. Addition of 30% of the prepared EG to LLDPE can improve its limiting oxygen index LOI from 17.5% to 29.4%, and the synergistic anti-flame LOI of 20% EG with 10 polyphosphate (APP II) can reach to 31.2%. TG and DTA analysis were completed to discuss the anti-flame mechanism. 70%LLDPE/10%APP(II)/20%EG synergistic anti-flame system can cause higher residual carbon and lower material surface temperature.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.57 n.3 20122012-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000300026en10.4067/S0717-97072012000300026
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Expandable graphite Dilatability Sodium pyrophosphate Flame retardancy LLDPE Mechanism
spellingShingle	Expandable graphite Dilatability Sodium pyrophosphate Flame retardancy LLDPE Mechanism PANG,X. Y SONG,M. K TIAN,Y DUAN,M. W PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPE
description	To prepare expandable graphite (EG) with high anti-flame property for Linear low density polyethylene (LLDPE), dosages of oxidant KMnO4, intercalation reagent H2SO4 and ancillary intercalation reagent Na4P2O7 were optimized during oxidation intercalation reaction of natural graphite. EG with an initiation expansion temperature of 148 ± 2 °C and expansion volume of 550 mL/g can be prepared according to the mass ratio of C:KMnO4:H2SO4(98%):Na4P2O7 = 1.0:0.4:5.0:0.6 (H2SO4 should be diluted to the mass concentration of 80% before intercalation reaction), the reaction time is 40 min at constant 40 °C. Addition of 30% of the prepared EG to LLDPE can improve its limiting oxygen index LOI from 17.5% to 29.4%, and the synergistic anti-flame LOI of 20% EG with 10 polyphosphate (APP II) can reach to 31.2%. TG and DTA analysis were completed to discuss the anti-flame mechanism. 70%LLDPE/10%APP(II)/20%EG synergistic anti-flame system can cause higher residual carbon and lower material surface temperature.
author	PANG,X. Y SONG,M. K TIAN,Y DUAN,M. W
author_facet	PANG,X. Y SONG,M. K TIAN,Y DUAN,M. W
author_sort	PANG,X. Y
title	PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPE
title_short	PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPE
title_full	PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPE
title_fullStr	PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPE
title_full_unstemmed	PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPE
title_sort	preparation of high dilatability expandable graphite and its flame retardancy for lldpe
publisher	Sociedad Chilena de Química
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000300026
work_keys_str_mv	AT pangxy preparationofhighdilatabilityexpandablegraphiteanditsflameretardancyforlldpe AT songmk preparationofhighdilatabilityexpandablegraphiteanditsflameretardancyforlldpe AT tiany preparationofhighdilatabilityexpandablegraphiteanditsflameretardancyforlldpe AT duanmw preparationofhighdilatabilityexpandablegraphiteanditsflameretardancyforlldpe
_version_	1718445472247447552

PREPARATION OF HIGH DILATABILITY EXPANDABLE GRAPHITE AND ITS FLAME RETARDANCY FOR LLDPE

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