Chemical Modification of Expandable Graphite by Boric Acid and Its Flame Retarded Application in Polyethylene

Ya-Fang Meng, Xiu-Yan Pang* and Wei-Shu Chang
Additional contact information
Ya-Fang Meng: College of Chemistry and Environmental Science, Hebei University, Baoding, China
Xiu-Yan Pang*: College of Chemistry and Environmental Science, Hebei University, Baoding, China
Wei-Shu Chang: College of Chemistry and Environmental Science, Hebei University, Baoding, China

Academic Journal of Chemistry, 2019, vol. 4, issue 7, 34-39

Abstract: The aim of this research is to get the graphite intercalation compound with high thermal stability and fire resistance. Firstly, the normal expandable graphite (EG) was prepared with potassium permanganate (KMnO4) as oxidant and sulfuric acid (H2SO4) as intercalator, respectively. Then, with (3-Aminopropyl)-trimethoxysilane (KH-550) as coupling agent, the boric acid (H3BO3) modified EG (EGB) was prepared by silane grafting method through H3BO3 bonded with EG. The analysis of X-ray powder diffractiometer and Fourier transform infrared spectroscopy testified the existence of EGB. EGB showed better thermal stability and flame retardancy for linear low density polyethylene (LLDPE) than the referenced EG. Addition of 13.0 wt% of EGB improved the limiting oxygen index (LOI) of 87.0LLDPE/13.0EGB to 24.6%, which was obviously higher than that of pure matrix of 17.5%. Whereas, the LOI of 87.0LLDPE/13EG was 22.7%. Furthermore, when EGB combined with ammonium polyphosphate (APP), the LOI and UL-94 level of 87.0LLDPE/8.7EGB/4.3APP reached 27.1% and V-0, respectively.

Keywords: Expandable graphite; Modification; Boric acid; Silane grafting; Flame retardancy (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.arpgweb.com/pdf-files/ajc4(7)34-39.pdf (application/pdf)
https://www.arpgweb.com/journal/20/archive/07-2019/7/4 (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:arp:ajcarp:2019:p:34-39

DOI: 10.32861/ajc.47.34.39

Access Statistics for this article

Academic Journal of Chemistry is currently edited by Prof. Dr. Sadek khalifa Shakshooki

More articles in Academic Journal of Chemistry from Academic Research Publishing Group Rahim Yar Khan 64200, Punjab, Pakistan.
Bibliographic data for series maintained by Managing Editor ().