Matches in SemOpenAlex for { <https://semopenalex.org/work/W2051105456> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W2051105456 endingPage "357" @default.
- W2051105456 startingPage "351" @default.
- W2051105456 abstract "When PAN fibers containing 4% methyl acrylate, 3.2 denier, react with SO2 at increasing temperature up to 290°C, the reaction is slow below 230°C and rapidly increases thereafter. The effects of up to 20 w/o S have been studied. The incorporation of S leads to an increase in fiber diameter. Reduction of DTA exotherm with increasing S content suggests that the fibers become more oxidation resistant, which is confirmed experimentally. Increase of secondary modulus and decrease of extension to failure values suggest the presence of cross-links; this is also indicated by IR absorption at 1690 cm−1 which may be ascribed to groups, with S atoms forming intermolecular bridges. Elemental analysis shows that per each incorporated S atom 2.7 to 3.8 H atoms are removed; the O/S ratio approaches 2 or is closer to 1 for the reaction taking place up to 230 or at 290°C, respectively. Above 230°C there is a certain degradation of the fibers, but this is diminished by pre-treatment at 230°C. The IR evidence (behavior of the 2240 and 2190 cm−1 peaks, presence of the 810 and 1590cm−1 absorption, behavior of the 2870 and 2940 cm−1 peaks) indicates that CN groups react slowly at 230°C but rapidly at 290°C, giving rise to a cyclized and aromatized product. Combining low-temperature (230°C) and high-temperature (290°C) SO2 treatment coupled with higher stretching force, fibers that retain the maximum of their initial carbon content and possess maximum amount of cross-linking, giving rise to highest mechanical properties of carbonized fibers, can be produced." @default.
- W2051105456 created "2016-06-24" @default.
- W2051105456 creator A5014092430 @default.
- W2051105456 creator A5072744532 @default.
- W2051105456 date "1978-01-01" @default.
- W2051105456 modified "2023-10-14" @default.
- W2051105456 title "Processes in sulfur dioxide treatment of PAN fibers" @default.
- W2051105456 cites W1964310693 @default.
- W2051105456 cites W1994568560 @default.
- W2051105456 cites W2006301865 @default.
- W2051105456 cites W2064532999 @default.
- W2051105456 cites W2076235609 @default.
- W2051105456 cites W2092745583 @default.
- W2051105456 cites W2108959479 @default.
- W2051105456 cites W2157515157 @default.
- W2051105456 doi "https://doi.org/10.1016/0008-6223(78)90073-8" @default.
- W2051105456 hasPublicationYear "1978" @default.
- W2051105456 type Work @default.
- W2051105456 sameAs 2051105456 @default.
- W2051105456 citedByCount "23" @default.
- W2051105456 countsByYear W20511054562012 @default.
- W2051105456 countsByYear W20511054562014 @default.
- W2051105456 countsByYear W20511054562017 @default.
- W2051105456 countsByYear W20511054562018 @default.
- W2051105456 countsByYear W20511054562019 @default.
- W2051105456 countsByYear W20511054562021 @default.
- W2051105456 countsByYear W20511054562022 @default.
- W2051105456 crossrefType "journal-article" @default.
- W2051105456 hasAuthorship W2051105456A5014092430 @default.
- W2051105456 hasAuthorship W2051105456A5072744532 @default.
- W2051105456 hasConcept C125287762 @default.
- W2051105456 hasConcept C159985019 @default.
- W2051105456 hasConcept C166950319 @default.
- W2051105456 hasConcept C178790620 @default.
- W2051105456 hasConcept C185592680 @default.
- W2051105456 hasConcept C192562407 @default.
- W2051105456 hasConcept C32909587 @default.
- W2051105456 hasConcept C518881349 @default.
- W2051105456 hasConcept C519885992 @default.
- W2051105456 hasConceptScore W2051105456C125287762 @default.
- W2051105456 hasConceptScore W2051105456C159985019 @default.
- W2051105456 hasConceptScore W2051105456C166950319 @default.
- W2051105456 hasConceptScore W2051105456C178790620 @default.
- W2051105456 hasConceptScore W2051105456C185592680 @default.
- W2051105456 hasConceptScore W2051105456C192562407 @default.
- W2051105456 hasConceptScore W2051105456C32909587 @default.
- W2051105456 hasConceptScore W2051105456C518881349 @default.
- W2051105456 hasConceptScore W2051105456C519885992 @default.
- W2051105456 hasIssue "5" @default.
- W2051105456 hasLocation W20511054561 @default.
- W2051105456 hasOpenAccess W2051105456 @default.
- W2051105456 hasPrimaryLocation W20511054561 @default.
- W2051105456 hasRelatedWork W1787461325 @default.
- W2051105456 hasRelatedWork W1992298044 @default.
- W2051105456 hasRelatedWork W1994062818 @default.
- W2051105456 hasRelatedWork W2027431076 @default.
- W2051105456 hasRelatedWork W2150436753 @default.
- W2051105456 hasRelatedWork W2357765269 @default.
- W2051105456 hasRelatedWork W2737498735 @default.
- W2051105456 hasRelatedWork W2898370298 @default.
- W2051105456 hasRelatedWork W2899084033 @default.
- W2051105456 hasRelatedWork W3142536350 @default.
- W2051105456 hasVolume "16" @default.
- W2051105456 isParatext "false" @default.
- W2051105456 isRetracted "false" @default.
- W2051105456 magId "2051105456" @default.
- W2051105456 workType "article" @default.