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rphill12 (Mechanical) (OP)
23 Oct 07 8:54
I'm trying to find the Poisson ratio for a number of polymers and composites but I'm having trouble doing so.  Is there a reason that this information is so hard to come by?  I know that most polymers have a range of 0.3 to 0.5, but specific values are needed for this application.

The materials in question are:

EMI 262
EMI 361    
RTP 681    
Ultem 1000

Thank you for your help!
Helpful Member!  cedro (Mechanical)
23 Oct 07 11:08

I use 0.38 for ABS and PC.

Generally I use 0.4 for thermoplastics, near 0.5 for rubberlike polymers and down to min 0.35 for glass filled or mineral filled polymers.

This is due for RT and moderate strain levels. At high level of plastic strain you would need something else to be correct.

PC and ABS are amorphous polymer and shuold be quite stable in their using temperatures.  

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