FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2085705767> ?p ?o ?g. }

• W2085705767 endingPage "4844" @default.
• W2085705767 startingPage "4837" @default.
• W2085705767 abstract "The kinetics of the transesterification reaction occurring in blends of wholly aromatic copolyesters have been investigated by simulation of the changes that occur in the X-ray scattering data as a result of the interchange. The X-ray fiber diagrams of copolyesters prepared from p-hydroxybenzoic acid (HBA) and 2-hydroxy-6-naphthoic acid (HNA) contain nonperiodic diffraction maxima along the chain axis direction that vary in position (scattering angle) with the monomer composition and are due to the structural correlations in chains of completely random comonomer sequence. Melt blends of two different compositions initially show the scattering maxima of both components, but these shift as the specimen is held in the melt, until they merge to give the diffraction data characteristic of the intermediate composition. We have simulated the changes in these data by modeling the changes in the correlation function that occur as a result of the transesterification reaction. We find that the data are best reproduced using a completely random interchange model for a completely compatible blend. Simulations based on preferential reactivities of one or other of the monomers or partial segregation of one phase gave significantly inferior agreement with the positions of the observed diffraction maxima. The statistical modeling allows us to derive kinetic parameters for the reaction, for which we obtain an activation energy of 142 kJ/mol and a rate constant of 2.3 × 10-4 s-1 at 315 °C. Compared to the equivalent data for isotropic polyesters, the activation energy compares very well, but the rate constant is 1 order of magnitude lower, perhaps due to the ordering in the thermotropic melt." @default.
• W2085705767 created "2016-06-24" @default.
• W2085705767 creator A5014869043 @default.
• W2085705767 creator A5015048377 @default.
• W2085705767 creator A5069285230 @default.
• W2085705767 date "1997-08-01" @default.
• W2085705767 modified "2023-09-23" @default.
• W2085705767 title "X-ray Analysis of the Kinetics of Transesterification in Blends of Wholly Aromatic Thermotropic Copolyesters" @default.
• W2085705767 cites W1971843610 @default.
• W2085705767 cites W1976314014 @default.
• W2085705767 cites W1993401096 @default.
• W2085705767 cites W1993443870 @default.
• W2085705767 cites W1995090954 @default.
• W2085705767 cites W1997398652 @default.
• W2085705767 cites W2003971161 @default.
• W2085705767 cites W2004433458 @default.
• W2085705767 cites W2022519287 @default.
• W2085705767 cites W2025794752 @default.
• W2085705767 cites W2030961255 @default.
• W2085705767 cites W2033312926 @default.
• W2085705767 cites W2034666547 @default.
• W2085705767 cites W2037940725 @default.
• W2085705767 cites W2039467032 @default.
• W2085705767 cites W2040537480 @default.
• W2085705767 cites W2043403509 @default.
• W2085705767 cites W2044651842 @default.
• W2085705767 cites W2057971337 @default.
• W2085705767 cites W2062303248 @default.
• W2085705767 cites W2066565720 @default.
• W2085705767 cites W2074086465 @default.
• W2085705767 cites W2080055332 @default.
• W2085705767 cites W2082324373 @default.
• W2085705767 cites W2083385017 @default.
• W2085705767 cites W2086585168 @default.
• W2085705767 cites W2159737875 @default.
• W2085705767 cites W2166357473 @default.
• W2085705767 doi "https://doi.org/10.1021/ma961932j" @default.
• W2085705767 hasPublicationYear "1997" @default.
• W2085705767 type Work @default.
• W2085705767 sameAs 2085705767 @default.
• W2085705767 citedByCount "5" @default.
• W2085705767 countsByYear W20857057672016 @default.
• W2085705767 crossrefType "journal-article" @default.
• W2085705767 hasAuthorship W2085705767A5014869043 @default.
• W2085705767 hasAuthorship W2085705767A5015048377 @default.
• W2085705767 hasAuthorship W2085705767A5069285230 @default.
• W2085705767 hasConcept C121332964 @default.
• W2085705767 hasConcept C147789679 @default.
• W2085705767 hasConcept C148898269 @default.
• W2085705767 hasConcept C161790260 @default.
• W2085705767 hasConcept C166940927 @default.
• W2085705767 hasConcept C178790620 @default.
• W2085705767 hasConcept C185592680 @default.
• W2085705767 hasConcept C188027245 @default.
• W2085705767 hasConcept C192562407 @default.
• W2085705767 hasConcept C22064058 @default.
• W2085705767 hasConcept C2777241282 @default.
• W2085705767 hasConcept C2780672802 @default.
• W2085705767 hasConcept C2994273327 @default.
• W2085705767 hasConcept C44280652 @default.
• W2085705767 hasConcept C521977710 @default.
• W2085705767 hasConcept C62520636 @default.
• W2085705767 hasConcept C8010536 @default.
• W2085705767 hasConcept C93391505 @default.
• W2085705767 hasConcept C95121573 @default.
• W2085705767 hasConcept C97355855 @default.
• W2085705767 hasConceptScore W2085705767C121332964 @default.
• W2085705767 hasConceptScore W2085705767C147789679 @default.
• W2085705767 hasConceptScore W2085705767C148898269 @default.
• W2085705767 hasConceptScore W2085705767C161790260 @default.
• W2085705767 hasConceptScore W2085705767C166940927 @default.
• W2085705767 hasConceptScore W2085705767C178790620 @default.
• W2085705767 hasConceptScore W2085705767C185592680 @default.
• W2085705767 hasConceptScore W2085705767C188027245 @default.
• W2085705767 hasConceptScore W2085705767C192562407 @default.
• W2085705767 hasConceptScore W2085705767C22064058 @default.
• W2085705767 hasConceptScore W2085705767C2777241282 @default.
• W2085705767 hasConceptScore W2085705767C2780672802 @default.
• W2085705767 hasConceptScore W2085705767C2994273327 @default.
• W2085705767 hasConceptScore W2085705767C44280652 @default.
• W2085705767 hasConceptScore W2085705767C521977710 @default.
• W2085705767 hasConceptScore W2085705767C62520636 @default.
• W2085705767 hasConceptScore W2085705767C8010536 @default.
• W2085705767 hasConceptScore W2085705767C93391505 @default.
• W2085705767 hasConceptScore W2085705767C95121573 @default.
• W2085705767 hasConceptScore W2085705767C97355855 @default.
• W2085705767 hasIssue "17" @default.
• W2085705767 hasLocation W20857057671 @default.
• W2085705767 hasOpenAccess W2085705767 @default.
• W2085705767 hasPrimaryLocation W20857057671 @default.
• W2085705767 hasRelatedWork W1973693107 @default.
• W2085705767 hasRelatedWork W1979252271 @default.
• W2085705767 hasRelatedWork W1982696177 @default.
• W2085705767 hasRelatedWork W1987981406 @default.
• W2085705767 hasRelatedWork W2012199400 @default.
• W2085705767 hasRelatedWork W2041382885 @default.
• W2085705767 hasRelatedWork W2054806565 @default.
• W2085705767 hasRelatedWork W2059795807 @default.

• next