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Morphology and mechanical properties of polyacrylonitrile/attapulgite nanocomposite

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Abstract

The major objective of this work is to understand the effects of attapulgite (AT) on the mechanical properties of polyacrylonitrile (PAN)/AT nanocomposite film. The well dispersed but irregularly distributed AT nanoparticles in the matrix was observed by scanning electron microscopy (SEM) and UV–vis spectra. The mechanical properties were investigated by means of tensile tests and dynamic mechanical analyses (DMA). The results showed that the incorporation of AT significantly improved the tensile strength and modulus of the PAN matrix. The fracture morphologies analysis has further suggested that small amount of AT nanorods may slide and orient along the tensile direction, resulting in homogenous stress transfer, thus increase the toughness of the PAN. However, the nanorods network formed in high AT content sample probably hindered the deformation of the matrix and generated the stress concentration points, leading to the remarkable increase of embrittlement of the samples. Following this concept, the volume of the constrained polymer chains was also calculated with DMA data and showed the good correlation with conclusion drawn in the tensile tests.

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Acknowledgements

This study was supported by Grants from the National Basic Research Program (973 Program) (No. 2006CB606505), the National Natural Foundation of China (No. 50333050), the Shanghai Fundamental Theory Program (No. 07DJ14002) and the Programme of Introducing Talents of Discipline to Universities (No. 111-2-04) and the Fund of Innovation Project on Doctoral Dissertation of Donghua University.

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Authors and Affiliations

  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, People’s Republic of China

    Han Yin, Huifang Chen & Dajun Chen

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  1. Han Yin
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  2. Huifang Chen
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  3. Dajun Chen
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Correspondence to Dajun Chen.

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Yin, H., Chen, H. & Chen, D. Morphology and mechanical properties of polyacrylonitrile/attapulgite nanocomposite. J Mater Sci 45, 2372–2380 (2010). https://doi.org/10.1007/s10853-009-4203-3

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  • DOI: https://doi.org/10.1007/s10853-009-4203-3

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