Mechanical and microstructural properties of polystyrene based composites: positron lifetime spectroscopic and DSC studies

Altaweel, A M A M and Raj, J. M and Chandrashekara, M. N. and Ramya, P. and Sampathkumaran, P. and Ranganathaiah, C. (2011) Mechanical and microstructural properties of polystyrene based composites: positron lifetime spectroscopic and DSC studies. JOURNAL OF POLYMER ENGINEERING, 31 (2-3, S). pp. 69-72.

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Official URL: https://doi.org/10.1515/polyeng.2011.021.

Abstract

Polystyrene (PS) based composites respectively with cenosphere (CS) and calcium aluminosilicate (CAS) as fillers were studied using the positron lifetime technique to reveal the correlation between free volume, a microstructural property, and mechanical properties of the composites (tensile strength and tensile modulus). The thermal stability of the composites was determined using differential scanning calorimetry. The results showed that addition of CAS filler lead to a significant improvement in the mechanical properties of the composite, whereas addition of CS resulted in improvement in tensile modulus only. Both PS/CAS and PS/CS composites showed enhancement in thermal stability compared with that of the pure PS matrix. The positron results showed that the average free volume size for the PS/CAS composite (at 40 phr CAS) was reduced significantly compared with that of the pure PS. These results are understood in terms of the influence of silica content, filler-matrix interaction, and particle size.

Item Type: Article
Uncontrolled Keywords: calcium aluminosilicate; cenosphere; mechanical properties; polystyrene
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: lpa venkatesh user
Date Deposited: 25 Jul 2019 09:55
Last Modified: 25 Jul 2019 09:55
URI: http://eprints.uni-mysore.ac.in/id/eprint/2457

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