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Flame Retardant Polyamide Fibres: The Challenge of Minimising Flame Retardant Additive Contents with Added Nanoclays.
Polymers (Basel). 2016 Aug 09; 8(8)P

Abstract

This work shows that halogen-free, flame retarded polyamide 6 (PA6), fabrics may be produced in which component fibres still have acceptable tensile properties and low levels (preferably ≤10 wt %) of additives by incorporating a nanoclay along with two types of flame retardant formulations. The latter include (i) aluminium diethyl phosphinate (AlPi) at 10 wt %, known to work principally in the vapour phase and (ii) ammonium sulphamate (AS)/dipentaerythritol (DP) system present at 2.5 and 1 wt % respectively, believed to be condense phase active. The nanoclay chosen is an organically modified montmorillonite clay, Cloisite 25A. The effect of each additive system is analysed in terms of its ability to maximise both filament tensile properties relative to 100% PA6 and flame retardant behaviour of knitted fabrics in a vertical orientation. None of the AlPi-containing formulations achieved self-extinguishability, although the presence of nanoclay promoted lower burning and melt dripping rates. The AS/DP-containing formulations with total flame retardant levels of 5.5 wt % or less showed far superior properties and with nanoclay, showed fabric extinction times ≤ 39 s and reduced melt dripping. The tensile and flammability results, supported by thermogravimetric analysis, have been interpreted in terms of the mechanism of action of each flame retardant/nanoclay type.

Authors+Show Affiliations

Institute for Materials Research and Innovation, University of Bolton, Deane Road, Bolton BL3 5AB, UK. a.r.horrocks@bolton.ac.uk.Faculty of Science, Department of Physics, Eastern University Sri Lanka, Chenkaladi 30350, Sri Lanka. sitpalanahilan@yahoo.com.Institute for Materials Research and Innovation, University of Bolton, Deane Road, Bolton BL3 5AB, UK. CZ2BEE@bolton.ac.uk.Institute for Materials Research and Innovation, University of Bolton, Deane Road, Bolton BL3 5AB, UK. B.Kandola@bolton.ac.uk.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30974566

Citation

Horrocks, Richard, et al. "Flame Retardant Polyamide Fibres: the Challenge of Minimising Flame Retardant Additive Contents With Added Nanoclays." Polymers, vol. 8, no. 8, 2016.
Horrocks R, Sitpalan A, Zhou C, et al. Flame Retardant Polyamide Fibres: The Challenge of Minimising Flame Retardant Additive Contents with Added Nanoclays. Polymers (Basel). 2016;8(8).
Horrocks, R., Sitpalan, A., Zhou, C., & Kandola, B. K. (2016). Flame Retardant Polyamide Fibres: The Challenge of Minimising Flame Retardant Additive Contents with Added Nanoclays. Polymers, 8(8). https://doi.org/10.3390/polym8080288
Horrocks R, et al. Flame Retardant Polyamide Fibres: the Challenge of Minimising Flame Retardant Additive Contents With Added Nanoclays. Polymers (Basel). 2016 Aug 9;8(8) PubMed PMID: 30974566.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Flame Retardant Polyamide Fibres: The Challenge of Minimising Flame Retardant Additive Contents with Added Nanoclays. AU - Horrocks,Richard, AU - Sitpalan,Ahilan, AU - Zhou,Chen, AU - Kandola,Baljinder K, Y1 - 2016/08/09/ PY - 2016/06/21/received PY - 2016/07/26/revised PY - 2016/08/02/accepted PY - 2019/4/13/entrez PY - 2016/8/9/pubmed PY - 2016/8/9/medline KW - aluminium diethyl phosphinate KW - ammonium sulphamate KW - dipentaerythritol KW - fabrics KW - flammability KW - nanoclay KW - polyamide 6 KW - tensile properties JF - Polymers JO - Polymers (Basel) VL - 8 IS - 8 N2 - This work shows that halogen-free, flame retarded polyamide 6 (PA6), fabrics may be produced in which component fibres still have acceptable tensile properties and low levels (preferably ≤10 wt %) of additives by incorporating a nanoclay along with two types of flame retardant formulations. The latter include (i) aluminium diethyl phosphinate (AlPi) at 10 wt %, known to work principally in the vapour phase and (ii) ammonium sulphamate (AS)/dipentaerythritol (DP) system present at 2.5 and 1 wt % respectively, believed to be condense phase active. The nanoclay chosen is an organically modified montmorillonite clay, Cloisite 25A. The effect of each additive system is analysed in terms of its ability to maximise both filament tensile properties relative to 100% PA6 and flame retardant behaviour of knitted fabrics in a vertical orientation. None of the AlPi-containing formulations achieved self-extinguishability, although the presence of nanoclay promoted lower burning and melt dripping rates. The AS/DP-containing formulations with total flame retardant levels of 5.5 wt % or less showed far superior properties and with nanoclay, showed fabric extinction times ≤ 39 s and reduced melt dripping. The tensile and flammability results, supported by thermogravimetric analysis, have been interpreted in terms of the mechanism of action of each flame retardant/nanoclay type. SN - 2073-4360 UR - https://www.unboundmedicine.com/medline/citation/30974566/Flame_Retardant_Polyamide_Fibres:_The_Challenge_of_Minimising_Flame_Retardant_Additive_Contents_with_Added_Nanoclays_ L2 - http://www.mdpi.com/resolver?pii=polym8080288 DB - PRIME DP - Unbound Medicine ER -
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