Hi Temperature Adhesive

[TheBigM]

I have to carry out tensile testing at 210°C. The maximum cure temperature of my composite will have been 240°C.

Can anyone recommend a good adhesive for bonding tabs and testing at this temperature?

M

 

[RPstress]

We tentatively selected TenCate EX-1543 for use at this sort of temperature. At 400°F (204°C) it's listed as having a shear strength of 1900 psi (13.1 MPa). Its RT shear strength is listed as 28.1 MPa, so it's not the most brilliant performer. However, if your specimens are not unusually thick it should be adequate. We did not get around to actually testing it. As a cyanate ester it's probably quite expensive.

NB: I cannot now find it on the

http://www.tencate.com/

website. They do list higher temp polycyanates RS-53 and TC4015. This latter has a claimed shear strength at 500°F (260°C) of 2600 psi (17.9 MPa).

You could also look for BMI film adhesives. Hexcel HP655 might work.

 

[TheBigM]

Thanks for the information. By the looks of it the Hexcel HP655 is the best choice.

Thanks again.

M

 

[PeterLester]

Have you tried the Cotronics products? I've used 4625 with great success. Bear in mind these are mostly epoxies but should work as adhesives for your application.

Graydon Tranquilla P.Eng Electrical
Industrial Oil and Gas Industry,
APEGBC, APEGGA, APEGS, APEGM