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Rosenberg, M. L.

Publications and source records attributed to Rosenberg, M. L..

4 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1981

Characterization of cured polystyrylpyridine by model compounds

The crosslinking or curing reaction of polystyrylpyridine (PSP) has been studied by means of thermal reactions of its model compounds. Compounds 2,6-distyrylpyridine, 4-stilbazole, and deuterated 4-stilbazole were pyrolyzed at 200-325 C both in air and under vacuum in a sealed tube. The major pyrolysis products were diarylethane and stilbene, and were characterized by gas chromatography-mass spectrometry. Major dimeric products were naphthalene or quinoline derivatives. Mechanisms for the pyrolysis are suggested, and a crosslinked structure for cured PSP is proposed based on the thermal reaction products of model compounds.

Hsu, M.-T. S.↗
NASA NTRS1979

Singlet oxygenation of 1,2-poly/1,4-hexadiene/s

The microstructural changes that occur in cis and trans forms of 1,2-poly(1,4-hexadiene) during methylene blue-photosensitized oxidation were examined by infrared and (C-13)-NMR spectroscopy. The singlet oxygenation of these polymers yielded the expected allylic hydroperoxides accompanied by double bond shifts to new vinyl and trans-vinylene double bonds. The photosensitized oxidation exhibited zero-order kinetics; the relative rates for the cis- and trans-1,2-poly(1,4-hexadiene)s were approximately 3.8:1.0.

Golub, M. A.↗