Form 9.B Project Summary

Chron: 972513

Proposal

Number: 20.01-5671

Project Title:Hybrid Inorganic/Organic Epoxy Resins Based on Silsesquioxane Cubes for Use in High Performance Fiber Reinforced Composites for Aerospace Applications

Technical Abstract (Limit 200 words)

NASA has an ongoing need for new polymeric materials which possess high mechanical strength, high impact resistance, stability over a wide range of extreme temperatures, and resistance to intense UV and ionizing radiation. We propose the use of silsesquioxane hybrid resins ([(RO)SiO1.5]8, where R is an epoxy or amine terminated organic group] in combination with commercial epoxy resins (DEGBA and TGMDA) and polyamine hardeners (1,6-hexanediamine, diaminodiphenylsulfone, and piperazine) as high performance thermoset polymers for use in fiber reinforced composites (FRCs). Such hybrids would combine the ease of processing (for which thermoset epoxies are known) with properties enhanced by the direct incorporation of robust (SiO1.5)8 clusters into the polymer backbone, resulting in high thermal and chemical stability, high mechanical strength, and increased resistance to atomic oxygen and UV radiation. Our objective for Phase I is to demonstrate that enhanced performance FRCís can be fabricated using silsesquioxane resins as major thermoset components. To achieve this we will 1) study the curing behavior of silsesquioxane resins with commercial epoxy resins and hardeners, 2) prepare a library of thermosets with varied compositions, 3) test the tensile strength, impact resistance, and thermal stability of the thermosets, and 4) fabricate chopped glass fiber/resin composites using thermosets which showed the best mechanical and thermal properties. In Phase II we will further optimize the thermoset formulations, investigate other fibrous components (i.e., ceramic fibers), and expand the scope of silsesquioxane resins into other potential uses such as advanced adhesives and coating materials.

Potential Commercial Applications (Limit 200 words)

The composite materials that will be developed in this program will be relatively low cost compared to all other high temperature resin materials commercially available. Because of this, it is anticipated that composite products made with these resins may be able to penetrate markets heretofore not possible with these materials. This includes many sports applications, some automotive engine components and if we succeed in making transparent materials, safety applications related to face shields. In addition, upon proper formulation, our materials can likely enhance the properties of epoxy resins used in many other applications, including adhesives and coatings.

Name and Address of Principal Investigator (Name,

Organization Name, Mail Address, City/State/Zip)

Anthony C. Sutorik

Tal Materials, Inc.

1375 Folkstone Ct.

Ann Arbor , MI 48105

Name and Address of Offeror (Firm Name, Mail Address,

City/State/Zip)

David R. Treadwell

Tal Materials, Inc.

1375 Folkstone Ct.

Ann Arbor , MI 48105