Environmental Stress Cracking Resistance of Halloysite Nanoclay-Polyester Nanocomposites

• 作者: Fawad Inam Islam Shyha Jiacheng Wei Mohd Shahneel Saharudin
• 来源期刊: 世界工程和技术(英文)
• 学科: 工学
• 关键词: HALLOYSITE NANOCLAY ENVIRONMENTAL Stress CRACKING Resistance NANOCOMPOSITES POLYESTER
• 年，卷（期）: 2017,（3）
• 页码范围: 389-403
• 页数: 15页
• 分类号: TB3

摘要

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.