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Polyimides from isomeric oxydiphthalic anhydrides
Li, QX; Fang, XZ; Wang, Z; Gao, LX; Ding, MX
2003-11-01
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume41Issue:21Pages:3249-3260
Abstract2,2',3,3'-Oxydiphthalic dianhydride (2,2',3,3'-ODPA) and 2,3,3',4'-ODPA were synthesized from 3-chlorophthalic anhydride with 2,3-xylenol and 3,4-xylenol, respectively. Their structures were determined via single-crystal X-ray diffraction. A series of polyimides derived from isomeric ODPAs with several diamines were prepared in dimethylacetamide (DMAc) with the conventional two-step method. Matrix-assisted laser desorption/ionization time-of-flight spectra showed that the polymerization of 2,2',3,3'-ODPA with 4,4'-oxydianiline (ODA) has a greater trend to form cyclic oligomers than that of 2,3,3',4'-ODPA. Both 2,2',3,3'-ODPA and 2,3,3',4'-ODPA based polyimides have good solubility in polar aprotic solvents such as DMAc, dimethylformamide, and N-methylpyrrolidone. The 5% weight-loss temperatures of all polyimides were obtained near 500 degreesC in air. Their glass-transition temperatures measured by dynamic mechanical thermal analysis or differential scanning calorimetry decreased according to the order of polyimides on the basis of 2,2',3,3'-ODPA, 2,3,3',4'-ODPA, and 3,3',4,4'-ODPA. The wide-angle X-ray diffraction of all polyimide films from isomeric ODPAs and ODA showed some certain extent of crystallization after stretching. Rheological properties revealed that polyimide (2,3,3',4'-ODPA/ODA) has a comparatively lower melt viscosity than its isomers, which indicated its better melt processability. (C) 2003 Wiley Periodicals, Inc.
KeywordOxydiphthalic Dianhydride Isomer/isomerization Polyimides Melt Processability Structure-property Relations
DOI10.1002/pola.10918
Indexed BySCI
Language英语
WOS IDWOS:000185967500007
PublisherJOHN WILEY & SONS INC
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80702
Collection中国科学院化学研究所
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
Li, QX,Fang, XZ,Wang, Z,et al. Polyimides from isomeric oxydiphthalic anhydrides[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2003,41(21):3249-3260.
APA Li, QX,Fang, XZ,Wang, Z,Gao, LX,&Ding, MX.(2003).Polyimides from isomeric oxydiphthalic anhydrides.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,41(21),3249-3260.
MLA Li, QX,et al."Polyimides from isomeric oxydiphthalic anhydrides".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 41.21(2003):3249-3260.
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