Accession Number:

ADA067185

Title:

Determination of Crosslinking in High Tg Polymers.

Personal Author(s):

Corporate Author:

RESEARCH TRIANGLE INST RESEARCH TRIANGLE PARK N C

Report Date:

1979-01-01

Abstract:

Small angle x-ray scattering SAXS and WAXS techniques are being developed to investigate and characterize cured epoxy resin inhomogeneities on the one hand and to elucidate the spatial distribution of crosslinks on the other. Priority was given to the first problems, i.e., network inhomogeneities. Samples of cured epoxy resin have been formulated in series that would be expected to follow trends in size of highly cross-linked clusters according to results and theories in the literature. Examination of two such series of samples by SAXS shows that the expected trends are followed and that the differing sizes of clusters do cause clearly discernible changes in the SAXS pattern. However, the need for SAXS data at higher resolution is clearly indicated to allow complete interpretation. Such data is now being obtained. The proposed preparation of cured epoxy resins in which heavy atoms would be present only at cross-links is described. Progress in the synthesis of the required heavy atom reagents is reported. Author

Descriptive Note:

Interim rept. 15 Oct 77-15 Oct 78,

Supplementary Note:

DOI: 10.21236/ADA067185

Pages:

0088

Descriptors:

Subject Categories:

Communities Of Interest:

Contract Number:

F33615-77-C-5195

File Size:

26.39MB

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