Curing process, mechanical property and thermal stability of acrylic polyurethane/Fe2O3 nanocomposite coatings

Do Truc Vy; Dao Phi Hung; Nguyen Tuan Anh; Tran Dai Lam; Nguyen Thien Vuong

doi:10.15625/2525-2518/17553

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Authors

Do Truc Vy 1Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam 2Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
Dao Phi Hung 1Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam 2Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
Nguyen Tuan Anh Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
Tran Dai Lam 1Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam 2Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
Nguyen Thien Vuong 1Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam 2Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/17553

Keywords:

acrylic polyol coating, nanocomposite coating, Fe2O3 nanoparticles, thermal stability, mechanical properties

Abstract

The effect of Fe₂O₃ nanoparticles (NPs) on the curing and properties of acrylic polyol HSU 1168 based coating were investigated. The SEM images showed that Fe₂O₃ NPs with the content £ 2 wt.% were dispersed regularly in the polymer matrix. The obtained results indicated that Fe₂O₃ NPs slowed down the curing process of acrylic polyol coating. Without nanoparticles, the neat HSU 1168 based coating has completely cured after 96 hours, whereas in the presence of 2 wt.% Fe₂O₃ NPs in coating matrix it needed 120 hours for a full curing. In addition, the relative hardness of nanocomposite coating has reduced with increasing the Fe₂O₃ NPs content. Without nanoparticles, the relative hardness of neat acrylic polyol coating was 0.88, whereas it was 0.75 when 4 wt.% Fe₂O₃ NPs was added into the coating matrix. Besides, incorporation of Fe₂O₃ NPs into the acrylic polyol coating also enhanced its abrasion resistance and impact resistance with 2 wt.% Fe₂O₃ NPs being the best content (i.e. 200 kG.cm of impact resistance and 408.8 L/mil of abrasion resistance). On the other hand, incorporation of Fe₂O₃ NPs into the coating matrix improved its thermal stability. The starting temperature for degradation of nanocomposite coating (with 2 wt.% Fe₂O₃ NPs) was 15 ^oC higher than that of the neat coating (without nanoparticles)

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