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- W2044891505 abstract "Analysis of two asphaltene and six preasphaltene samples have shown that 60 to 80% of the total oxygen is accounted for as phenol and carbonyl groups. Thus, ethers make up no more than 40% of the oxygen in these samples. Mofification of the proposed models, particularly the preasphaltenes, by incorporation of carbonyl moieties is therefore warranted. Thirty diaryl ethers and oligo(aryl oxides), both with and without phenolic OH groups, ranging from 186 g/mole to 538 g/mole have been synthesized as model asphaltenes. Preasphaltene models have been modified to include carbonyl groups (generally as quinones). The synthesis of the first of these new models has been accomplished and work on the preparation of other models is in progress." @default.
- W2044891505 created "2016-06-24" @default.
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- W2044891505 date "1982-12-01" @default.
- W2044891505 modified "2023-09-23" @default.
- W2044891505 title "Synthesis of oligomeric models of coal derived materials for use with GPC calibration. Quarterly report, September 1982-November 1982" @default.
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