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dc.contributor.authorChou, CHen_US
dc.contributor.authorReddy, DSen_US
dc.contributor.authorShu, CFen_US
dc.date.accessioned2014-12-08T15:41:47Z-
dc.date.available2014-12-08T15:41:47Z-
dc.date.issued2002-11-01en_US
dc.identifier.issn0887-624Xen_US
dc.identifier.urihttp://dx.doi.org/10.1002/pola.10431en_US
dc.identifier.urihttp://hdl.handle.net/11536/28408-
dc.description.abstractThe synthesis and properties of organosoluble aromatic polyimides, containing spiro-skeletal units in the polymer backbone on the basis of the spiro-diamine monomer, 2,2'-diamino-9,9'-spirobifluorene, are described. In the case of the Spiro segment, the two fluorene rings are orthogonally arranged and connected through a tetrahedral bonding carbon atom, the Spiro center. As a consequence, the polymer chain is periodically zigzagged with a 90degrees angle at each Spiro center. This structural feature minimizes interchain interactions and restricts the close packing of the polymer chains, resulting in amorphous polyimides that have good solubility in organic solvents. Compared with their fluorene-based cardo analogues, the spirobifluorene-based polyimides have an improved solubility. Furthermore, the main-chain rigidity of the polyimide appears to be preserved because of the presence of the spiro structure, which restricts the free segmental mobility. As a result, these polyimides exhibit a high glass-transition temperature (T-g's) and good thermal stability. The T-g's of these polyimides were in the range of 287-374 degreesC, and the decomposition temperatures in nitrogen for a 10% weight loss occurred at temperatures above 570 degreesC. (C) 2002 Wiley Periodicals, Inc. J Polym, Sci Part A: Polym Chem 40: 3615-3621, 2002.en_US
dc.language.isoen_USen_US
dc.subjectorganosolubleen_US
dc.subjectpolyimidesen_US
dc.subjectspirobifluoreneen_US
dc.subjectamorphousen_US
dc.subjectthermal propertiesen_US
dc.titleSynthesis and characterization of spirobifluorene-based polyimidesen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/pola.10431en_US
dc.identifier.journalJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRYen_US
dc.citation.volume40en_US
dc.citation.issue21en_US
dc.citation.spage3615en_US
dc.citation.epage3621en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000178546200007-
dc.citation.woscount57-
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