Structural effect of secondary antioxidants on mechanical properties and stabilization efficiency of polyamide 6/halloysite nanotube composites during heat ageing. Issue 39 (19th June 2017)

• Record Type: Journal Article
• Authors: Boonkongkaew, Marnviga; Hornsby, Peter; Sirisinha, Kalyanee
• Is Part Of: Journal of applied polymer science. Volume 134:Issue 39(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-06-19
• Subjects: ageing -- clay -- composites -- mechanical properties -- polyamides; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.45360
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: Hindered phenol (Irganox 1010) was combined with two kinds of secondary antioxidants [i.e., tris(2, 4‐di‐ tert ‐butylphenyl) phosphite (Irgafos168) and tris(nonylphenyl) phosphite (TNPP)] to form antioxidant mixtures, and their influences on mechanical properties and thermo‐oxidative degradation of polyamide 6 (PA6) and halloysite nanotube (HNT) filled composites were investigated. The results showed that the antioxidant combinations provided an improvement in the oxidative induction time, decomposition temperature ( Td ), processability, and tensile properties of PA6. Irganox/TNPP (1:1) was found to exhibit the best thermal oxidative resistance. The study of heat ageing in the air oven at 130 °C showed that the stabilized composites with 5 wt % of HNT could retain 92% of strength without loss of modulus. The physical characteristics of antioxidants such as low volatility and possible interaction with filler in the composites played a crucial role in stabilizing efficiency during heat ageing. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2017, 134, 45360. Abstract :