Miscibility, UV resistance, thermal degradation, and mechanical properties of PMMA/SAN blends and their composites with MWCNTs
Corresponding Author
Jyotishkumar Parameswaranpillai
Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, Kerala, 682022 India
Correspondence to: J. Parameswaranpillai (E-mail: [email protected])Search for more papers by this authorGeorge Joseph
Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, Kerala, 682022 India
Search for more papers by this authorSisanth Krishnan Sidhardhan
Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, Kerala, 682022 India
Search for more papers by this authorSeno Jose
Department of Chemistry, Government College, Kottayam, Kerala, 686013 India
Search for more papers by this authorNishar Hameed
Carbon Nexus, Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Geelong, VIC, 3220 Australia
Search for more papers by this authorCorresponding Author
Jyotishkumar Parameswaranpillai
Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, Kerala, 682022 India
Correspondence to: J. Parameswaranpillai (E-mail: [email protected])Search for more papers by this authorGeorge Joseph
Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, Kerala, 682022 India
Search for more papers by this authorSisanth Krishnan Sidhardhan
Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, Kerala, 682022 India
Search for more papers by this authorSeno Jose
Department of Chemistry, Government College, Kottayam, Kerala, 686013 India
Search for more papers by this authorNishar Hameed
Carbon Nexus, Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Geelong, VIC, 3220 Australia
Search for more papers by this authorABSTRACT
Poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) (PMMA/SAN) blends, with varying concentrations, were prepared by melt-mixing technique. The miscibility is ensured by fixing the acrylonitrile (AN) content of styrene acrylonitrile (SAN) as 25% by weight. The blends were transparent as well. The Fourier transform infrared spectroscopic (FTIR) studies did not reveal any specific interactions, supporting the well accepted ‘copolymer repulsion effect’ as the driving mechanism for miscibility. Addition of SAN increased the stability of PMMA towards ultraviolet (UV) radiations and thermal degradation. Incorporation of even 0.05% by weight of multi-walled carbon nanotubes (MWCNTs) significantly improved the UV absorbance and thermal stability. Moreover, the composites exhibited good strength and modulus. However, at higher concentrations of MWCNTs (0.5 and 1% by weight) the thermo-mechanical properties experienced deterioration, mainly due to the agglomeration of MWCNTs. It was observed that composites with 0.05% by weight of finely dispersed and well distributed MWCNTs provided excellent protection in most extreme climatic conditions. Thus, PMMA/SAN/MWCNTs composites can act as excellent light screens and may be useful, as cost-effective UV absorbers, in the outdoor applications. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43628.
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August 10, 2016
