In a message dated 8/29/2007 2:23:11 A.M. Eastern Daylight Time,  
[log in to unmask] writes:

Hi  Leo,
I have some data about hydrolysis for a glassfiber reinforced PWB  type
that is similar to FR-4. Two diagrams on tensile modulus and  tensile
strength vs. immersion in stem and water vs time up to 1,000 hs.  Can
send offline if  you are  interested.
Inge


I have the same interest - physical properties of laminate with changes in  
humidity.  My interest is in vibration performance of military boards, and  we 
have determined that laminate stiffness definitely plays a role. However, we  
would also like to know if "wet - Somalia" versus "dry - Saudi Arabia" 
locations  also affects vibration performance.  Thanks in advanced. 
 
Dennis Fritz
SAIC, Inc (Crane Naval Weapons Depot - Indiana).  



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