Does anyone know how Vinyl Ester compares to polyester? I am looking for a stronger alternitive to polyester for rein infusion. I don’t want to use epoxy and was wandering if Vinyl Ester would be any stronger.
Vinylester resins are superior to polyester resins in almost every aspect. Does your strength requirement justify the added cost? What are you making?
Without doing any reasearch (which is really easy but I’m tired and lazy today), I’m pretty sure Vinyl Ester is LESS (yeah that’s what I said LESS) expensive than epoxy also.
I would probably stick with poly. For now at least.
It’s cheaper than epoxy depends on brands.
Vinyl Ester isn’t more expensive than epoxy. At least on all the suppliers I’ve looked at. VER is more than poly, but less than epoxy.
Possibly a daft question, but what is the advantage of using Vinylester resin with carbon instead of epoxy? 
Is it just price or is there some specific property that can be taken advantage of (depending on what youre making I 'spose)?
Its basically half-way between polyester and epoxy, yes?
Is it structural?
If you stretch one fiber the length of a boat and pinched it with your fingers epoxy would have the clamping force of 2000 psi VER 500 and PER 300. If it’s subject to water, that would be another vote for epoxy. Application and how long you expect it to live there is key…
Bull
Just some figures I got on the various resins from a very boring composites video that JM has at his shop.
Elongation =
Ortho Polyester: 2%
Iso Polyester: 1.4%
Vinylester: 4.5%
Epoxy: 4 to 7.5%
Modulous of elasticity =
Ortho: .59
Iso: .52
VE: .40
Epoxy: .40 to .80
Tensile Ksi =
Ortho: 9
Iso: 9.5
VE: 11.5
Epoxy: 10.20
Density =
Ortho: 74
Iso: 73
VE: 69
Epoxy: 74-77
Which one from the many that I have? I think that was the one that disappeared maybe…:rolleyes:
For manufacture of tanks containing alcohol fuels, vinyl ester is very good indeed. In terms of production of non-structural cosmetic carbon parts, then vinyl ester is also a good choice, as it can significantly reduce production costs, while having minimal effects on strength of finished parts.