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Epoxy characteristics - expansion and contraction

Epoxy characteristics - expansion and contraction

Epoxy characteristics - expansion and contraction

(OP)
I am using a 60 min set Loctite Epoxy. I am having a problem with the two parts which I am bonding together moving after curing. The parts are fine while clamped together but when pressure is removed, the parts rebound. Is this something anyone has encountered?

RE: Epoxy characteristics - expansion and contraction

(OP)
Does anyone have a suggestion of an adhesive which has a low linear shrinkage value?  

RE: Epoxy characteristics - expansion and contraction

You need to provide more information to get any reasonable response. I was going to wait until someone else felt like playing twenty questions.

To answer your second question, epoxy has about the lowest cure shrinkage of any adhesive. I infer from you question that you think that adhesive shinkage is causing your problem. That maybe the case, I can't say from what you've described. You may be using a heat cured epoxy and differing CTE (coefficient of thermal expansion) of your adherends and the adhesive maybe more the issue.

RE: Epoxy characteristics - expansion and contraction

VADLAB

It depends totally on your application. In my experience the faster curing adhesives (like domestic Aradite etc.) tend to be compromised in terms of shrinkage and strength.

I use Henkel Hysol EA9309NA to bond glass to Titanium and the shrinkage is very low. I cure at about 50C which gives full cure in only a few hours.

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