carbon fibre-flame retardent properties?
26-09-2009, 07:30 PM
#1
carbon fibre-flame retardent properties?
just been playing with some c/f and wondered (as you do) how fire retardent it was
so mixed up some resin put a flame to a little bit-no ignite
got a strand of matting put a flame to it-no ignite
put some resin on the strand-whumph straight up in flames
why when no ignition on individual items does it ignite when together?
so mixed up some resin put a flame to a little bit-no ignite
got a strand of matting put a flame to it-no ignite
put some resin on the strand-whumph straight up in flames
why when no ignition on individual items does it ignite when together?
26-09-2009, 07:34 PM
#2
probably a complex relationship between the burning properties of each material.
I suspect when the two are as a composite, the fibres have the "fuel" resin on them thin enough to ignite and sustain on thier own rather than seperately.
Same idea with the self lighting BBQ charcoal as the charcoal itself wouldnt normally ignite like that.
I suspect when the two are as a composite, the fibres have the "fuel" resin on them thin enough to ignite and sustain on thier own rather than seperately.
Same idea with the self lighting BBQ charcoal as the charcoal itself wouldnt normally ignite like that.
26-09-2009, 08:08 PM
#3
probably a complex relationship between the burning properties of each material.
I suspect when the two are as a composite, the fibres have the "fuel" resin on them thin enough to ignite and sustain on thier own rather than seperately.
Same idea with the self lighting BBQ charcoal as the charcoal itself wouldnt normally ignite like that.
I suspect when the two are as a composite, the fibres have the "fuel" resin on them thin enough to ignite and sustain on thier own rather than seperately.
Same idea with the self lighting BBQ charcoal as the charcoal itself wouldnt normally ignite like that.
sounds about right also the strand was totally undamaged after!!
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26-09-2009, 08:42 PM
#8
As warren said when combined they become falamable but not either on their own
Does the fibre enable more oxygen to be present and so flame temperature increases?
27-09-2009, 01:14 AM
#14
I can be 
its not just the burn rates/temps that change when the epoxy sets.
But thats NOT the point. When you combine two materials you can change the way it burns as well as the way it ignites.
You need to remember that an item being capable of burning at xxx degrees does not mean it will self sustain combustion throughout the material when a small portion gets to that temperature. Also vice versa something with a low burn temperature.
The combination of the material makes a huge difference to how they burn. for example parafin lamps, the parafin in a wick slows down the burn rate due to the combination of materials and the surface area.
But thats NOT the point. When you combine two materials you can change the way it burns as well as the way it ignites.
You need to remember that an item being capable of burning at xxx degrees does not mean it will self sustain combustion throughout the material when a small portion gets to that temperature. Also vice versa something with a low burn temperature.
The combination of the material makes a huge difference to how they burn. for example parafin lamps, the parafin in a wick slows down the burn rate due to the combination of materials and the surface area.
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