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Study on the Fibre Reinforced Epoxy-based Intumescent Coating Formulations and the Char Characteristics

Amir, Norlaili and Ahmad, Faiz and Megatt-Yusoff, P.S.M. (2010) Study on the Fibre Reinforced Epoxy-based Intumescent Coating Formulations and the Char Characteristics. In: ICPER2010, 15-17 June 2010, Kuala Lumpur Convention Centre.

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Abstract

The paper presented the works on the effects of fibre reinforcement to the char characteristics of epoxy-based intumescent coating formulations. Reinforcing fibres such as glass fibre and carbon fibre that were manually cut to 10mm in length and chopped fibre strands 3mm length into formulations developed using commercial phosphate-based materials i.e. ammonium polyphosphate (APP), pentaerythritol (PER) and melamine (MEL) as the main ingredients. Five formulations; control (without fibre), glass fibre reinforced, carbon fibre reinforced, hybrid fibre (glass and carbon fibres) reinforced and chopped fibre reinforced were prepared. Powder formulations were grinded using Rocklabs grinder and epoxy-mixed using Caframo mixer, where the maximum speed used was 150rpm and later hand-applied onto primer coated carbon steel substrates at room temperature. Natural drying time at room temperature for the coatings to fully dry was determined. Thermogravimetric analysis (TGA) was conducted on epoxy, hardener and the mix. Char formation and physical properties were investigated after the samples were exposed to high temperature fire tests up to 400ºC and 800ºC, respectively using electric furnace, Carbolite. Char height, weight, crispness, cell structure were examined and compared. Scanning electron microscopy (SEM) characterizations were also conducted to inspect fibre distribution and condition in the coatings as well as in the char. The results show the effect of different types, fibre length and epoxy to hardener ratio in promoting improved char cell structure, height and strength.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:intumescent coatings, glass fibre, carbon fibre, chopped fibre strand, char, fire test
Subjects:T Technology > TJ Mechanical engineering and machinery
Departments / MOR / COE:Departments > Mechanical Engineering
ID Code:6241
Deposited By: Dr Norlaili Amir
Deposited On:02 Aug 2011 04:04
Last Modified:31 Mar 2014 01:25

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