Modified PF resins for composite structures with improved mechanical properties

Cardona, F. and Aravinthan, T. and Moscou, C. (2010) Modified PF resins for composite structures with improved mechanical properties. Polymers and Polymer Composites, 18 (6). pp. 297-306. ISSN 0967-3911

Abstract

Novel composites resins for civil engineering structures were synthesised. Resol phenolic resins were modified by the copolymerization of Phenol with Cardanol and Formaldehyde (CPF). The CPF resins were synthesized at different proportions of Phenol to Cardanol and also of the total Phenol to Formaldehyde. The synthesis was carried out under alkaline conditions and with a maximum content of 40 wt% of Cardanol. The effect of the partial substitution of Phenol by Cardanol on the thermal and mechanical properties of the CPF resins was investigated. The fracture toughness and flexibility values of the cured CPF resins were found to be proportional to the Cardanol content in the resins. However, the flexural modulus values of the resins decreased with the amount of Cardanol. The higher toughening effect of replacing Phenol with Cardanol was obtained with the total P:F molar ratio of 1.0:1.25. Also a direct proportionality between the amount of Cardanol content and the decrease in crosslink density of the resins was observed. Simultaneous TGA-FTIR studies of the resins were carried out and the emitted gases were identified. The results confirmed that the thermal stability and the temperature of degradation of the cured CPF resins decreased as the amount of Cardanol content increased. Gas emissions during the pyrolysis of the CPF resins also increased.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author version not held.
Depositing User: Dr Francisco Cardona
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 12 Dec 2010 08:19
Last Modified: 03 Jul 2013 00:07
Uncontrolled Keywords: phenolic; cardanol; flexibility; crosslink density; fracture toughness; TGA/FTIR
Fields of Research (FOR2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030306 Synthesis of Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
Socio-Economic Objective (SEO2008): B Economic Development > 86 Manufacturing > 8698 Environmentally Sustainable Manufacturing > 869899 Environmentally Sustainable Manufacturing not elsewhere classified
D Environment > 96 Environment > 9699 Other Environment > 969999 Environment not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/9112

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