[SS-VehDev] Re: [SS-Main] to RN - temperature resis. hncmb/composite

[Lakestake Rocketry]

Hi William,

That sounds interesting, do you have a contact for them? I would not
mind following up on these threads for the group.

Matt

On 9/2/05, william colburn <space1space at sbcglobal.net> wrote:
> 
> SORAC developed Phenolic/Silica Fabric technology
> which could be used for the NC Tip.
> 
> BC
> 
> --- Ing. Roman Lev <r-composites at seznam.cz> wrote:
> 
> > details about themperature properties of
> > composite/honeycomb structures - all standard
> > resins/hardneres got Tg [ softening point ] about
> > 80 degC, in combination with better curing agents [
> > freely acessible ] about 110-115 degC. HT tooling
> > resins [ I have still about 3 lbs home ] after
> > postcuring Tg about 180 degC. Standard epoxy
> > prepregs are about 150-170 degC. Polyimides over
> > 220degC are unavailable for mee, they are too
> > expensive [ 200 $/ lbs... ], too difficult to work
> > and not usually accessible. Combination with
> > phenolic resin [ ablative prepregs made by Cytec
> > etc ] - fabric must be special surface treatment,
> > filament finishes of free accessible fabrics are not
> > compactible with phenolics.
> >
> > lets say the cheapest one technology up to 115 degC
> > better quality [ tooling ] resins up to 180 degC.
> > filament type doesnt have any influence here [ short
> > expositions, just minutes ].
> >
> > Do you want some samples to test? Its not a problem,
> > what shape?
> >
> > r+
> >
> >
> > _______________________________________________
> > SS-Main mailing list
> > SS-Main at sugarshot.org
> > http://www.exrocketry.net/mailman/listinfo/ss-main
> >
> 
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