Carbon-13 and proton spin-lattice relaxation times have been discussed in terms of intramolecular motions for solutions of poly(dimethyl-and poly(diphenylphenylene.oxides). The most suitable auto-correlation function seems to be a sum of several exponential modes. Comparison with the results of prev
The chemistry of carbon formation from polyphenylene and polyphenylene oxides
β Scribed by E. Fitzer; J. Kalka
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 112 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0008-6223
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## Synopsis Changes in the composition and structure of the surfaces of polyphenylene oxide (PPO) and polysulfone caused by UV photooxidation are followed using ESCA. The surface stoichiometry of PPO changes from CsOl to Cs04.s on photooxidation, the oxygen being added in the form of car-bony1 and
Cure behavior, miscibility, and phase separation have been studied in blends of polyphenylene oxide (PPO) with diglycidyl ether of bisphenol A (DGEBA) resin and cyanate ester hardener. An autocatalytic mechanism was observed for the epoxy/PPO blends and the neat epoxy. It was also found that the epo
## Abstract Summary: The ^1^H NMR and ^13^C NMR spectra of hyperbranched polyphenylenes synthesised from AB~2~, (AB~2~β+βAB) and (A~2~β+βB~3~) monomers (A: ethynyl group; B: cyclopentadienonyl group) were analysed with respect to the characteristic substructures of these polymers. The broad and ove