Synthesis and properties of novel polyimides derived from 2,2 ',3,3 '-benzophenonetetracarboxylic dianhydride
Fang, XZ; Li, QX; Wang, Z; Yang, ZH; Gao, LX; Ding, MX
AbstractA new synthetic route to 2,2',3,3'-BTDA (where BTDA is benzophenonetetracarboxylic dianhydride), an isomer of 2,3',3',4'-BTDA and 3,3',4,4'-BTDA, is described. Single-crystal X-ray diffraction analysis of 2,2',3,3'-BTDA has shown that this dianhydride has a bent and noncoplanar structure. The polymerizations of 2,2',3,3'-BTDA with 4,4'-oxydianiline (ODA) and 4,4'-bis(4-aminophenoxy)benzene (TPEQ) have been investigated with a conventional two-step process. A trend of cyclic oligomers forming in the reaction of 2,2',3,3'-BTDA and ODA has been found and characterized with IR, NMR, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and elemental analyses. Films based on 2,2',3,3'-BTDA/TPEQ can only be obtained from corresponding polyimide (PI) solutions prepared by chemical imidization because those from their polyamic acids by thermal imidization are brittle. PIS from 2,2',3,3'-BTDA have lower inherent viscosities and worse thermal and mechanical properties than the corresponding 2,3',3',4'-BTDA- and 3,3',4,4'-BTDA-based PIs. PIs from 2,2',3,3'-BTDA and 2,3',3',4'-BTDA are amorphous, whereas those from 3,3',4,4'-BTDA have some crystallinity, according to wide-angle X-ray diffraction. Furthermore, PIS from 2,2',3,3'-BTDA have better solubility, higher glass-transition temperatures, and higher melt viscosity than those from 2,3',3',4'-BTDA and 3,3',4,4'-BTDA. Model compounds have been prepared to explain the order of the glass-transition temperatures found in the isomeric PI series. The isomer effects on the PI properties are discussed. (C) 2004 Wiley Periodicals, Inc.
KeywordCyclic Oligomers Polyimides Model Compounds Isomer Effects On Polyimide Properties Structure-property Relations Rheology 2 2 ' 3 3 '-benzophenonetetracarboxylic Dianhydride (2 2 ' 3 3 '-btda)
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WOS IDWOS:000220851800010
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Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorDing, MX
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Fang, XZ,Li, QX,Wang, Z,et al. Synthesis and properties of novel polyimides derived from 2,2 ',3,3 '-benzophenonetetracarboxylic dianhydride[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2004,42(9):2130-2144.
APA Fang, XZ,Li, QX,Wang, Z,Yang, ZH,Gao, LX,&Ding, MX.(2004).Synthesis and properties of novel polyimides derived from 2,2 ',3,3 '-benzophenonetetracarboxylic dianhydride.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,42(9),2130-2144.
MLA Fang, XZ,et al."Synthesis and properties of novel polyimides derived from 2,2 ',3,3 '-benzophenonetetracarboxylic dianhydride".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 42.9(2004):2130-2144.
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