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Polymers
Volume 11
Issue 4
10.3390/polym11040615
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Article

Estimation of Mechanical Performance, Thermal Stability and Flame Retardancy of High-Impact Polystyrene/Surface-Modified APP/Carboxylic-Functionalized MWCNTs Nanocomposites

by
Li Ding
1,
Zhimeng Jia
2,
Hao Sun
2,
Yong Pan
2,* and
Jianping Zhao
1,*
1
College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China
2
College of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, China
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(4), 615; https://doi.org/10.3390/polym11040615
Submission received: 16 February 2019 / Revised: 24 March 2019 / Accepted: 28 March 2019 / Published: 3 April 2019
(This article belongs to the Special Issue Connecting the Fields of Polymer Reaction Engineering and Processing)
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Abstract

An ammonium polyphosphate (APP) surface-modified by silane coupling agent was used as flame retardant in high-impact polystyrene (HIPS). A series of HIPS nanocomposites containing different mass fractions of APP (k-APP) surface-modified by silane coupling agent (3-aminopropyl triethoxysilane, KH 550) and carboxylic-functionalized MWCNTs (COOH–MWCNTs) were prepared by the melt blending method. A composite only containing APP was also prepared as a reference material. Scanning electron microscopy (SEM) was employed to investigate the dispersion of the fillers into the HIPS matrix, and it was found the hydrophobic groups on the k-APP surface would greatly enhance the dispersion and prevent agglomerations compared with APP. Furthermore, the COOH–MWCNTs also showed good dispersibility into the matrix. Mechanical tests of the nanocomposites revealed that k-APP exhibits a more beneficial effect on both tensile and flexural properties compared with APP. Thermogravimetric analysis (TGA) and cone calorimeter tests (CCT) were conducted to probe the thermal and flammability properties of the nanocomposites, respectively. The synergistic effects of k-APP and COOH–MWCNTs on mechanical, thermal and flammability properties were examined as well.
Keywords: nanocomposites; ammonium polyphosphate; MWCNTs; high-impact polystyrene; thermal stability; flame retardancy nanocomposites; ammonium polyphosphate; MWCNTs; high-impact polystyrene; thermal stability; flame retardancy

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MDPI and ACS Style

Ding, L.; Jia, Z.; Sun, H.; Pan, Y.; Zhao, J. Estimation of Mechanical Performance, Thermal Stability and Flame Retardancy of High-Impact Polystyrene/Surface-Modified APP/Carboxylic-Functionalized MWCNTs Nanocomposites. Polymers 2019, 11, 615. https://doi.org/10.3390/polym11040615

AMA Style

Ding L, Jia Z, Sun H, Pan Y, Zhao J. Estimation of Mechanical Performance, Thermal Stability and Flame Retardancy of High-Impact Polystyrene/Surface-Modified APP/Carboxylic-Functionalized MWCNTs Nanocomposites. Polymers. 2019; 11(4):615. https://doi.org/10.3390/polym11040615

Chicago/Turabian Style

Ding, Li, Zhimeng Jia, Hao Sun, Yong Pan, and Jianping Zhao. 2019. "Estimation of Mechanical Performance, Thermal Stability and Flame Retardancy of High-Impact Polystyrene/Surface-Modified APP/Carboxylic-Functionalized MWCNTs Nanocomposites" Polymers 11, no. 4: 615. https://doi.org/10.3390/polym11040615

APA Style

Ding, L., Jia, Z., Sun, H., Pan, Y., & Zhao, J. (2019). Estimation of Mechanical Performance, Thermal Stability and Flame Retardancy of High-Impact Polystyrene/Surface-Modified APP/Carboxylic-Functionalized MWCNTs Nanocomposites. Polymers, 11(4), 615. https://doi.org/10.3390/polym11040615

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