Ultrasonic Mixing of Epoxy Curing Agents.
ARMY AVIATION RESEARCH AND DEVELOPMENT COMMAND ST LOUIS MO
Pagination or Media Count:
A new technique for mixing solid curing agents into liquid epoxy resins using ultrasonic energy has been developed. This procedure allows standard curing agents such as 4,4-diaminodiphenyl sulfone 4,4-DDS and its 3,3-isomer, 3,3-DDS to be mixed without prior melting of the curing agent. It also allows curing agents with very high melt temperatures such as 4,4-diaminobenzophenone 4,4-DABP 242 C to be mixed without premature curing. Four aromatic diamines were ultrasonically blended into MY-720 epoxy resin. These were 4,4-DDS 3,3-DDS 4,4-DABP and 3,3-DABP. Unfilled moldings were cast and cured for each system and their physical and mechanical properties compared.
- Laminates and Composite Materials
- Test Facilities, Equipment and Methods