Diffusion of seawater in unsaturated polyester resin and its glass fiber reinforced composites in the presence of titanium dioxide as UV absorber

Urs, M. V. Deepa and Ranganathaiah, C. and Ramani, R. and Lal, Babu and Alam, Sarfaraz (2006) Diffusion of seawater in unsaturated polyester resin and its glass fiber reinforced composites in the presence of titanium dioxide as UV absorber. Journal of Applied Polymer Science, 102 (3). pp. 2784-2794. ISSN 1097-4628

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Official URL: https://doi.org/10.1002/app.24490

Abstract

Abstract Diffusion of seawater in unsaturated polyester resin (UPR) and its glass fiber reinforced composite in the presence of titanium dioxide has been studied by sorption method. Incorporation of glass and TiO2 to UPR alters the seawater diffusion process from Fickian to non-Fickian type. The dual mode sorption model is used to separate Fickian-controlled and relaxation-controlled diffusion in case of UPR-T, UPR-G, and UPR-GT. The presence of TiO2 seems to stabilize UPR and its glass reinforced samples but an increase in the rate of seawater diffusion is observed for these systems. The free volume determined from positron lifetime measurements support the diffusion data in these systems. Results further indicate that the contribution to diffusion in the later stages of sorption is due to the increased contribution from the interfaces. The plasticizing effect of TiO2 is clearly seen even in the glass reinforced composite. DMA results show an increase in flexibility because of TiO2 presence both in the neat as well as glass reinforced resin which is well supported by decrease in Tg value from DSC data. © 2006 Wiley Periodicals, Inc. J Appl PolymSci 102: 2784–2794, 2006

Item Type: Article
Uncontrolled Keywords: unsaturated polyester, glass fiber, seawater diffusion, positron lifetime, free volume, titanium dioxide
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: lpa manjunath user
Date Deposited: 12 Aug 2019 06:09
Last Modified: 12 Aug 2019 06:09
URI: http://eprints.uni-mysore.ac.in/id/eprint/6259

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