The combined effects of zinc stannate and aluminium diethyl phosphinate on the burning behaviour of glass fibre-reinforced, high temperature polyamide (HTPA

Horrocks, Richard ORCID: 0000-0003-1431-058X, Smart, G., Hörold, S., Wanzke, W., Schlosser, E. and Williams, J. (2014) The combined effects of zinc stannate and aluminium diethyl phosphinate on the burning behaviour of glass fibre-reinforced, high temperature polyamide (HTPA. Polymer Degradation and Stability, 104. pp. 95-103. ISSN 0141-3910

[img]
Preview
Text
Horrocks et al Zinc stannate and aluminium diethyl phosphinate in HTPA_Final 12Jan2014.pdf

Download (943kB) | Preview
Official URL: https://www.sciencedirect.com/journal/polymer-degr...

Abstract

The effect of changing the ratio of aluminium diethyl phosphinate (as Exolit OP1230) and zinc stannate (as Flamtard S) present within a glass-reinforced high temperature polyamide (HTPA/GF) at a constant total flame retardant level of 15 wt% is shown to have fire performance properties that depend on the ratio of both these agents. Aluminium diethyl phosphinate (AlPi) alone at 15 wt% gives LOI > 40 vol% and a V-0 rating. The introduction of zinc stannate (ZS) at levels up to 3.75 wt% maintains the LOI at about 40 vol% and the V-0 rating. Similarly, glow wire ignition temperatures and cone calorimetry results, in terms of minimal peak heat release rate, show that optimum fire performance also occurs at the [ZS] ≤ 3.75% and [AlPi] ≥ 11.25% condition. Smoke generation reduces only slightly when highest levels of AlPi are present compared with the HPTA/GF sample and then reduces further as the ratio [ZS]/[AlPi] increases. Tensile and impact properties are also optimal for the [ZS] ≤ 3.75 wt% and [AlPi] ≥ 11.25 wt% condition. At the mechanistic level, TGA studies show that for HPTA/GF, the presence of oxygen increases char residue in the 450–550 °C region compared to when heated under nitrogen. Air oxidation further increased residues above 450 °C when AlPi is present and confirms other published work that the reported volatilization occurring during pyrolysis under nitrogen is now in competition with its oxidation to aluminium phosphate. Thus residues above 450 °C in air comprise both increased char from HTPA plus residual aluminium phosphate with the latter remaining above 600 °C after the former has oxidized.

Item Type: Article
Uncontrolled Keywords: Zinc stannate, Aluminium diethyl phosphinate, Polyamide, Flammability, Cone calorimetry, Tensile properties
Subjects: Q Science > Q Science (General)
Divisions: University of Bolton Research Centres > Institute for Materials Research and Innovation
Depositing User: Sarah Taylor
Date Deposited: 21 Mar 2018 08:53
Last Modified: 21 Mar 2018 08:53
Identification Number: 10.1016/j.polymdegradstab.2014.03.027
URI: http://ubir.bolton.ac.uk/id/eprint/1467

Actions (login required)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics

>