Reducing entrapped air in low density syntactic foam
Reducing entrapped air in low density syntactic foam
(OP)
I am requesting information about processes, materials and machinery for manufacturing low density (380-450 kg/m^3) syntactic foams.
I am intending to use glass microspheres and an epoxy matrix but alternative suggestions would be welcomed.
I have read the chapter in 'Polymeric Foams' D. Klempner (1991) about Syntactic foams but there are few details about actually mixing the resin and the microspheres to reduce entrapped air. The only mentions are of vacuum moulding, vibrating stirrers and vacuum mixers but I am unclear about how these would be applied.
Are there any techniques used with composites which could be applied to this problem?
The application is as an acoustic impedence matching material in an ultrasonic transducer.
Thanks, Tym
I am intending to use glass microspheres and an epoxy matrix but alternative suggestions would be welcomed.
I have read the chapter in 'Polymeric Foams' D. Klempner (1991) about Syntactic foams but there are few details about actually mixing the resin and the microspheres to reduce entrapped air. The only mentions are of vacuum moulding, vibrating stirrers and vacuum mixers but I am unclear about how these would be applied.
Are there any techniques used with composites which could be applied to this problem?
The application is as an acoustic impedence matching material in an ultrasonic transducer.
Thanks, Tym





RE: Reducing entrapped air in low density syntactic foam
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: Reducing entrapped air in low density syntactic foam
In your experience what method did you use for mixing the spheres with the resin? My aim is to produce a foam without air inclusions (the only porosity should be introduced by the microspheres).
Many thanks, Tym
RE: Reducing entrapped air in low density syntactic foam
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell