Cardona, Francisco and Lau, Alan Kin-Tak and Fedrigo, Jessica (2012) Novel phenolic resins with improved mechanical and toughness properties. Journal of Applied Polymer Science, 123 (4). pp. 2131-2139. ISSN 0021-8995
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Official URL: http://dx.doi.org/10.1002/app.34719
Identification Number or DOI: doi: 10.1002/app.34719
Novel phenolic type of thermoset resins were synthesized, and their mechanical and toughness properties were evaluated. Phenol Formaldehyde (PF) phenolic resins were modified to broaden their applications for modern composite structures. A first modification consisted of copolymerization of Phenol with Cardanol during the synthesis of resole phenolic (CPF) resins. The modified phenolic resins (CPF) were prepared at various molar ratios of total Phenol to Formaldehyde (F : P ratio) and with different weight ratios of Phenol to Cardanol. CPF resins with a maximum content of 40 wt % of Cardanol were synthesized and used. The CPF resins were applied as a plasticizer and toughening agent to the base PF resins. Both resins (CPF/PF) were mixed in different proportions, and their thermal and mechanical properties were then established. A full miscibility of the two resins was observed with the formation of a single-phase system. An increase in the content of Cardanol resulted in a propor- tional increase of the flexural strength and fracture tough- ness together with a decrease of the flexural modulus of the cured CPF/PF resins. Further increased plasticizing and toughening effect was also observed by the blending of the CPF resins with propylene glycol. The higher tough- ness and flexibility effect of the CPF resins was obtained with a F : P molar ratio equal to 1.25 and with a Cardanol content of 40% (w/w).
|Item Type:||Article (Commonwealth Reporting Category C)|
|Additional Information:||Permanent restricted access to published version due to publisher copyright policy.|
|Uncontrolled Keywords:||thermosets; CPF resins; toughness; strength; crosslink density|
|Fields of Research (FOR2008):||09 Engineering > 0905 Civil Engineering > 090503 Construction Materials|
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
|Socio-Economic Objective (SEO2008):||B Ecomonic Development > 86 Manufacturing > 8698 Environmentally Sustainable Manufacturing > 869899 Environmentally Sustainable Manufacturing not elsewhere classified|
|Deposited On:||12 Apr 2012 12:20|
|Last Modified:||22 Aug 2012 10:21|
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