Matches in SemOpenAlex for { <https://semopenalex.org/work/W2020031906> ?p ?o ?g. }
Showing items 1 to 71 of
71
with 100 items per page.
- W2020031906 endingPage "1578" @default.
- W2020031906 startingPage "1571" @default.
- W2020031906 abstract "Polyamide acid was prepared from pyromellitic dianhydride (PMDA) and p-phenylene-diamine (PDA) and was then reacted with NaH and methyl iodide to transform into methyl ester having various degrees of esterification. Polyamide acid methyl ester was also prepared by the polymerization between PDA and acid chloride of half-ester of PMDA. The cast films were imidized as fixed on glass substrate to give polyimide films having slightly higher tensile moduli than those from polyamide acid, suggesting that higher orientation along the film surface was achieved. It should be noted that the polyimide films prepared by the latter method from the meta-rich configuration had considerably low modulus. The polyimide films were then carbonized by heating to 900°C, and the electrical conductivity of the carbonized films was measured at room temperature. It was shown that the carbonized films from methyl ester have higher electrical conductivity than the films from corresponding polyamide acid. The carbonized films were further heated to 2800°C for graphitization, and their degrees of graphitization and orientation of the graphite crystallite as a function of esterification ratio were studied by x-ray diffraction measurement at room temperature and magnetoresistance measurement at liquid nitrogen temperature. Both measurements clearly indicate that the graphite films prepared from polyamide acid methyl ester have high degrees of graphitization and orientation. © 1996 John Wiley & Sons, Inc." @default.
- W2020031906 created "2016-06-24" @default.
- W2020031906 creator A5047599467 @default.
- W2020031906 creator A5049689899 @default.
- W2020031906 creator A5071418562 @default.
- W2020031906 creator A5073716699 @default.
- W2020031906 creator A5079568325 @default.
- W2020031906 date "1996-08-29" @default.
- W2020031906 modified "2023-10-14" @default.
- W2020031906 title "Carbonization and graphitization of polyimide films: Polyamide acid methyl ester of PMDA/PDA as a precursor" @default.
- W2020031906 doi "https://doi.org/10.1002/(sici)1097-4628(19960829)61:9<1571::aid-app16>3.0.co;2-t" @default.
- W2020031906 hasPublicationYear "1996" @default.
- W2020031906 type Work @default.
- W2020031906 sameAs 2020031906 @default.
- W2020031906 citedByCount "13" @default.
- W2020031906 countsByYear W20200319062012 @default.
- W2020031906 countsByYear W20200319062013 @default.
- W2020031906 countsByYear W20200319062015 @default.
- W2020031906 countsByYear W20200319062016 @default.
- W2020031906 countsByYear W20200319062019 @default.
- W2020031906 crossrefType "journal-article" @default.
- W2020031906 hasAuthorship W2020031906A5047599467 @default.
- W2020031906 hasAuthorship W2020031906A5049689899 @default.
- W2020031906 hasAuthorship W2020031906A5071418562 @default.
- W2020031906 hasAuthorship W2020031906A5073716699 @default.
- W2020031906 hasAuthorship W2020031906A5079568325 @default.
- W2020031906 hasConcept C127413603 @default.
- W2020031906 hasConcept C154877778 @default.
- W2020031906 hasConcept C159985019 @default.
- W2020031906 hasConcept C188027245 @default.
- W2020031906 hasConcept C190399342 @default.
- W2020031906 hasConcept C192562407 @default.
- W2020031906 hasConcept C26771246 @default.
- W2020031906 hasConcept C2778093655 @default.
- W2020031906 hasConcept C2779227376 @default.
- W2020031906 hasConcept C2780871995 @default.
- W2020031906 hasConcept C2780965675 @default.
- W2020031906 hasConcept C42360764 @default.
- W2020031906 hasConceptScore W2020031906C127413603 @default.
- W2020031906 hasConceptScore W2020031906C154877778 @default.
- W2020031906 hasConceptScore W2020031906C159985019 @default.
- W2020031906 hasConceptScore W2020031906C188027245 @default.
- W2020031906 hasConceptScore W2020031906C190399342 @default.
- W2020031906 hasConceptScore W2020031906C192562407 @default.
- W2020031906 hasConceptScore W2020031906C26771246 @default.
- W2020031906 hasConceptScore W2020031906C2778093655 @default.
- W2020031906 hasConceptScore W2020031906C2779227376 @default.
- W2020031906 hasConceptScore W2020031906C2780871995 @default.
- W2020031906 hasConceptScore W2020031906C2780965675 @default.
- W2020031906 hasConceptScore W2020031906C42360764 @default.
- W2020031906 hasIssue "9" @default.
- W2020031906 hasLocation W20200319061 @default.
- W2020031906 hasOpenAccess W2020031906 @default.
- W2020031906 hasPrimaryLocation W20200319061 @default.
- W2020031906 hasRelatedWork W2020031906 @default.
- W2020031906 hasRelatedWork W2023112434 @default.
- W2020031906 hasRelatedWork W2031473526 @default.
- W2020031906 hasRelatedWork W2050524159 @default.
- W2020031906 hasRelatedWork W2070714246 @default.
- W2020031906 hasRelatedWork W2089122474 @default.
- W2020031906 hasRelatedWork W2090775175 @default.
- W2020031906 hasRelatedWork W2104071393 @default.
- W2020031906 hasRelatedWork W2510657076 @default.
- W2020031906 hasRelatedWork W2485351774 @default.
- W2020031906 hasVolume "61" @default.
- W2020031906 isParatext "false" @default.
- W2020031906 isRetracted "false" @default.
- W2020031906 magId "2020031906" @default.
- W2020031906 workType "article" @default.