Preparation and Anti-Flame Capability of Expandable Graphite

Xiu Yan Pang; Ming Kai Song

doi:10.4028/www.scientific.net/AMR.560-561.779

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 560-561Preparation and Anti-Flame Capability of...

Preparation and Anti-Flame Capability of Expandable Graphite

Abstract:

_{Subscript text}Feasible conditions to get flame retardant expandable graphite (EG) with low initiation expansion temperature and high dilatability were obtained through orthogonal test and single factor experiment. EG with 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 : 98% H₂SO₄ : Na₄P₂O7 = 1.0 : 0.4 : 5.0 : 0.6 (H₂SO₄ should be diluted to th_{Subscript text}e mass concentration of 80% before intercalation reaction), the reaction time is 40 min at 40 °C. Addition of 30% of the prepared EG to Liner Low-Density Polyethylene (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 was completed to discuss the anti-flame mechanism.

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Periodical:

Advanced Materials Research (Volumes 560-561)

Pages:

779-783

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.560-561.779

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Online since:

August 2012

Authors:

Xiu Yan Pang, Ming Kai Song

Keywords:

Dilatability, Expandable, Flame Retardant, Graphite, LLDPE, Mechanism, Sodium Pyrophosphate

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References

[1] X.L. Chen, K. M. Song, J.H. Li, Preparation of lower-sulfur content and expandable graphite, Carbon, 34(1996)1599-1603.

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