incompatibility glass and polyster resin ?
incompatibility glass and polyster resin ?
(OP)
I dont know whether this question is appropriate on this forum or in the polymer forum and so I will post this also there .
I am presently sticking glass( of 4 mm thickness ) using polyester resin onto fibre glass of around 2mm thickness . However the problem I have is that many of the pieces seem to break after some days .
My feeling is that there is an incompatibility in the coeffecient of expansions of the two materials namely glass and resin leading to this cracking during shipment by air .
I would like to know if someone has had a similar experience and the possible solution for this problem .
Thanks in advance
I am presently sticking glass( of 4 mm thickness ) using polyester resin onto fibre glass of around 2mm thickness . However the problem I have is that many of the pieces seem to break after some days .
My feeling is that there is an incompatibility in the coeffecient of expansions of the two materials namely glass and resin leading to this cracking during shipment by air .
I would like to know if someone has had a similar experience and the possible solution for this problem .
Thanks in advance





RE: incompatibility glass and polyster resin ?
They have different coefficients of expansion, but really, polyester is a poor adhesive if you are using it "wet". Polyester resin can shrink up to 5%, prestressing the brittle glass, and the brittle bond, a whole lot, priming it for a break. A flexible epoxy, as a glue or as the binder for the (cured) fiberglass, would work much better: its a better adhesive, and doesn't shrink.
I can help you with sourcing...
good luck,
CF
RE: incompatibility glass and polyster resin ?
Regards,
RE: incompatibility glass and polyster resin ?
For cheaper epoxies try douglas and sturges, www.artstuf.com. 2001/7132 combo is also clear.
Also: you could make the fiberglass out of epoxy and fabric, instead of polyester and fabric, and avoid the gluing step.