RESEARCH ON IMPROVED EPOXY RESINS.
Abstract
The primary purpose of this program is to define the correlations of novel polyepoxide molecular configurations with the physical properties of cured resins and composites as the initial step in providing significant improvements in filament reinforced plastics for deep submergence structures. The synthesis and evaluation of new epoxy resin configurations, especially those derived from cyclopentenyl phenols, were continued. One new type of epoxy resins, typified by EXRN-1972, showed potential high performance in modulus, strength, and resistance to crack propagation. The poly-functional resins, such as EXRN-2280 and EXRN-1798, showed potential high performance at elevated temperatures. Homopolymers of bis- (2,3-epoxycyclopentyl) ether, developed elsewhere but screened for potential in deep submergence applications under the NRL Program, exhibited generally good performance in salt water and as high as 14,500 psi interlaminar shear strength. The shear strength of these 'million-modulus' homopolymers was comparable to that of EP-2114, another 'million-modulus' epoxy resin. Cast resin properties from a series of epoxy resins hardened with several aromatic diamines are reported, but these data are sufficient to advance only speculative conclusions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1965
- Accession Number
- AD0473140
Entities
People
- C. A. Gibson
- J. R. Harvey
- R. F. Sellers
- R. H. Carey
- W. P. Mulvaney