Effect of Surface Modification on Strain Rate Sensitivity of Polypropylene/Muscovite Layered Silicate Composites

Abstract:

Surface modification is one of the treatment methods that can be implemented to improve the strain rate sensitivity of composite materials. In this study, both untreated and treated polypropylene/muscovite layered silicate composites were tested under static and dynamic loading up to 1100 s^-1 using the universal testing machine and the split Hopkinson pressure bar apparatus, respectively. Muscovite particles were treated with lithium nitrate and cetyltrimethylammonium bromide as a surfactant through ion exchange treatment. Results show that the treated polypropylene/muscovite specimens with fine state of dispersion level shows better rate of sensitivity as compared to untreated polypropylene/muscovite specimens under a wide range of strain rate investigated. Apart from that, the rate of sensitivity of both tested polypropylene/muscovite layered silicate composites also show great dependency on the strain rate sensitivity was steadily increased with increasing strain rate. Unfortunately, the thermal activation values show contrary trend. Key words: Ion exchange treatment; Strain rate sensitivity; Muscovite particles; Split Hopkinson pressure bar apparatus; Strain rates

• Periodical: Materials Science Forum (Volume 803)
• Pages: 343-347
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.803.343
• Online since: August 2014
• Authors: MOHD FIRDAUS OMAR*, Nur Suhaili Abd Wahab, Hazizan Md Akil, Zainal Arifin Ahmad, Mohd Fadli Ahmad Rasyid, N.Z. Noriman
• Keywords: Ion Exchange Treatment, Muscovite Particles, Split Hopkinson Pressure Bar Apparatus, Strain Rate, Strain Rate Sensitivity

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