Matches in SemOpenAlex for { <https://semopenalex.org/work/W2094637701> ?p ?o ?g. }
Showing items 1 to 97 of
97
with 100 items per page.
- W2094637701 endingPage "3814" @default.
- W2094637701 startingPage "3807" @default.
- W2094637701 abstract "Two series of thermotropic main chain discotic liquid crystalline polyethers, PR4m-n, based on rufigallol were prepared starting from the symmetric tetraethers of rufigallol, R4m; m and n represent the number of carbon atoms in the side chain and spacer segment, respectively. The symmetric tetraethers were in turn readily prepared by selective alkylation of rufigallol under controlled phase-transfer conditions. GPC analysis of the polymers suggested that they were all of moderate molecular weights, with Mn varying between 5400 and 17 000. The length of the spacer segment n in these polyethers was systematically varied, and its effect on the phase transition temperatures and the mesophase structure was examined using DSC, polarized light microscopy, and X-ray diffraction. It is noticed that when the spacer lengths are relatively long (n ≥ 2m), the isotropization temperature (TD-i) decreases as the spacer length n increases, an observation that is in accordance with those previously made. However, when the spacer lengths are relatively small (n < 2m), the dependence of TD-i is quite the opposite; TD-i actually increases with an increase in spacer length. Furthermore, X-ray diffraction studies indicate that, in the discotic columnar mesophases that are formed, the columns pack in a hexagonal manner when n ≥ 2m, while they do so in a rectangular lattice when n < 2m, leading to the formation of Dh and Dr mesophases, respectively. Finally, comparison of the discotic polyethers with their low molar mass analogues confirms the role of polymerization in stabilizing the mesophase; while all the polymers exhibit columnar mesophases, some of their low molar mass analogues are not liquid crystalline." @default.
- W2094637701 created "2016-06-24" @default.
- W2094637701 creator A5006210236 @default.
- W2094637701 creator A5063534344 @default.
- W2094637701 creator A5067285615 @default.
- W2094637701 date "1998-05-23" @default.
- W2094637701 modified "2023-10-03" @default.
- W2094637701 title "Synthesis and Properties of Main Chain Discotic Liquid Crystalline Polyethers Based on Rufigallol" @default.
- W2094637701 cites W1570402463 @default.
- W2094637701 cites W1850567893 @default.
- W2094637701 cites W1971926411 @default.
- W2094637701 cites W1981951480 @default.
- W2094637701 cites W2013031031 @default.
- W2094637701 cites W2025477806 @default.
- W2094637701 cites W2033447287 @default.
- W2094637701 cites W2043465692 @default.
- W2094637701 cites W2049173846 @default.
- W2094637701 cites W2052194698 @default.
- W2094637701 cites W2066087167 @default.
- W2094637701 cites W2072731652 @default.
- W2094637701 cites W2072735058 @default.
- W2094637701 cites W2085618267 @default.
- W2094637701 cites W2093531473 @default.
- W2094637701 cites W2127897744 @default.
- W2094637701 cites W2144198948 @default.
- W2094637701 cites W3134410488 @default.
- W2094637701 cites W4240328163 @default.
- W2094637701 doi "https://doi.org/10.1021/ma9716342" @default.
- W2094637701 hasPublicationYear "1998" @default.
- W2094637701 type Work @default.
- W2094637701 sameAs 2094637701 @default.
- W2094637701 citedByCount "24" @default.
- W2094637701 countsByYear W20946377012012 @default.
- W2094637701 countsByYear W20946377012014 @default.
- W2094637701 countsByYear W20946377012016 @default.
- W2094637701 countsByYear W20946377012017 @default.
- W2094637701 countsByYear W20946377012018 @default.
- W2094637701 countsByYear W20946377012020 @default.
- W2094637701 crossrefType "journal-article" @default.
- W2094637701 hasAuthorship W2094637701A5006210236 @default.
- W2094637701 hasAuthorship W2094637701A5063534344 @default.
- W2094637701 hasAuthorship W2094637701A5067285615 @default.
- W2094637701 hasConcept C111643667 @default.
- W2094637701 hasConcept C114137331 @default.
- W2094637701 hasConcept C120665830 @default.
- W2094637701 hasConcept C121332964 @default.
- W2094637701 hasConcept C13274807 @default.
- W2094637701 hasConcept C147498150 @default.
- W2094637701 hasConcept C178790620 @default.
- W2094637701 hasConcept C185592680 @default.
- W2094637701 hasConcept C188027245 @default.
- W2094637701 hasConcept C192562407 @default.
- W2094637701 hasConcept C22064058 @default.
- W2094637701 hasConcept C2994273327 @default.
- W2094637701 hasConcept C3535393 @default.
- W2094637701 hasConcept C44280652 @default.
- W2094637701 hasConcept C49040817 @default.
- W2094637701 hasConcept C521977710 @default.
- W2094637701 hasConcept C8010536 @default.
- W2094637701 hasConceptScore W2094637701C111643667 @default.
- W2094637701 hasConceptScore W2094637701C114137331 @default.
- W2094637701 hasConceptScore W2094637701C120665830 @default.
- W2094637701 hasConceptScore W2094637701C121332964 @default.
- W2094637701 hasConceptScore W2094637701C13274807 @default.
- W2094637701 hasConceptScore W2094637701C147498150 @default.
- W2094637701 hasConceptScore W2094637701C178790620 @default.
- W2094637701 hasConceptScore W2094637701C185592680 @default.
- W2094637701 hasConceptScore W2094637701C188027245 @default.
- W2094637701 hasConceptScore W2094637701C192562407 @default.
- W2094637701 hasConceptScore W2094637701C22064058 @default.
- W2094637701 hasConceptScore W2094637701C2994273327 @default.
- W2094637701 hasConceptScore W2094637701C3535393 @default.
- W2094637701 hasConceptScore W2094637701C44280652 @default.
- W2094637701 hasConceptScore W2094637701C49040817 @default.
- W2094637701 hasConceptScore W2094637701C521977710 @default.
- W2094637701 hasConceptScore W2094637701C8010536 @default.
- W2094637701 hasIssue "12" @default.
- W2094637701 hasLocation W20946377011 @default.
- W2094637701 hasOpenAccess W2094637701 @default.
- W2094637701 hasPrimaryLocation W20946377011 @default.
- W2094637701 hasRelatedWork W1505458355 @default.
- W2094637701 hasRelatedWork W1980707808 @default.
- W2094637701 hasRelatedWork W2012176006 @default.
- W2094637701 hasRelatedWork W2013831399 @default.
- W2094637701 hasRelatedWork W2031806868 @default.
- W2094637701 hasRelatedWork W2040468908 @default.
- W2094637701 hasRelatedWork W2049716410 @default.
- W2094637701 hasRelatedWork W2060910958 @default.
- W2094637701 hasRelatedWork W2158438356 @default.
- W2094637701 hasRelatedWork W3207301419 @default.
- W2094637701 hasVolume "31" @default.
- W2094637701 isParatext "false" @default.
- W2094637701 isRetracted "false" @default.
- W2094637701 magId "2094637701" @default.
- W2094637701 workType "article" @default.