Environmental stress cracking resistance of halloysite nanoclay-polyester nanocomposites

Saharudin, Mohd, Wei, Jiacheng, Shyha, Islam and Inam, Fawad (2017) Environmental stress cracking resistance of halloysite nanoclay-polyester nanocomposites. World Journal of Engineering and Technology, 5 (3). pp. 389-403. ISSN 2331-4249

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Official URL: http://dx.doi.org/10.4236/wjet.2017.53033

Abstract

The environmental stress cracking resistance of halloysite nanoclay-polyester nanocomposites was investigated using fracture mechanics approach. The incorporation of halloysite nanoclay was found to improve the environmental stress cracking resistance of the nano-composites. The storage modulus of nano-composites measured by dynamic mechanical analysis increased remarkably as a function of halloysite nanoclay content. At 0.7 wt% nanoclay, the Tg improved from 72°C to 76°C. The fracture toughness increased up to 33% and time to failure improved 155% with the addition of 0.7 wt% of halloysite nanoclay. The maximum microhardness was found 119% higher for the same nano-filler concentration compared to monolithic polyester. The reinforcement with 1 wt% showed lower fracture toughness due to agglomerations of nanoclay which act as flaws. The presence of agglomerates weakened the bond between nano-particles and matrix hence reduces the environmental stress cracking resistance by halloysite nanoclay reinforcement.

Item Type: Article
Subjects: F200 Materials Science
H300 Mechanical Engineering
J400 Polymers and Textiles
J500 Materials Technology not otherwise specified
J600 Maritime Technology
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Fawad Inam
Date Deposited: 18 Jul 2017 10:27
Last Modified: 18 Jul 2017 10:27
URI: http://nrl.northumbria.ac.uk/id/eprint/31366

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