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Article: Optical transparency and light colour of highly soluble fluorinated polyimides derived from a novel pyridine-containing diamine m, p-3FPAPP and various aromatic dianhydrides
Title | Optical transparency and light colour of highly soluble fluorinated polyimides derived from a novel pyridine-containing diamine m, p-3FPAPP and various aromatic dianhydrides |
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Authors | |
Keywords | fluorinated polyimides light color Pyridine-containing diamine solubility thermal stability transparency |
Issue Date | 2011 |
Publisher | V S P. The Journal's web site is located at http://www.brill.nl/m_catalogue_sub6_id9721.htm |
Citation | Designed Monomers And Polymers, 2011, v. 14 n. 6, p. 579-592 How to Cite? |
Abstract | A novel pyridine-containing aromatic diamine monomer, 4-(4- trifluoromethylphenyl)-2,6-bis[3-(4-aminophenoxy)phenyl]pyridine (m,p-3FPAPP), was successfully synthesized by a modified Chichibabin reaction of 4-trifluoromethylbenzaldehyde and a substituted acetophenone, 3-(4-nitrophenoxy)acetophenone (m,p-NPAP), followed by a reduction of the resulting dinitro compound 4-(4-trifluoromethylphenyl)-2,6bis[3-(4-nitrophenoxy) phenyl] pyridine (m,p-3FPNPP) with Pd/C and hydrazine monohydrate. The aromatic diamine was employed to synthesize a series of pyridine-containing polyimides by polycondensation with various aromatic dianhydrides in N,N-dimethylformamide (DMF) via the conventional two-step method, and further thermal or chemical imidization forming polyimides. The inherent viscosities of the resulting poly(amic acid)s and polyimides were 0.62-0.89 and 0.58-0.69 dl/g, and most of the polyimides obtained by chemical imidization were readily soluble in common organic solvents such as DMF, N,N-dimethylacetamide (DMAc), N-methyl-2- pyrrolidone (NMP) and tetrahydrofuran (THF). Meanwhile, strong and flexible polyimide films were obtained, which had good thermal stability, with a glass transition temperature (T g) of 234.4-246.6°C and the temperature at 10% weight loss of 561.4-600.6°C in nitrogen atmosphere, and good optical transparency with the cut-off wavelengths of 369-378 nm, as well as outstanding mechanical properties with tensile strengths of 89.5-96.4 MPa, a tensile modulus of 1.52-1.63 GPa and elongation-at-break of 7.2-8.7%. The polyimide films also were found to possess low water uptake (0.61-0.79%). © 2011 Koninklijke Brill NV, Leiden. |
Persistent Identifier | http://hdl.handle.net/10722/159747 |
ISSN | 2023 Impact Factor: 1.8 2023 SCImago Journal Rankings: 0.329 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Yan, S | en_HK |
dc.contributor.author | Chen, W | en_HK |
dc.contributor.author | Yan, W | en_HK |
dc.contributor.author | Huang, M | en_HK |
dc.contributor.author | Chen, C | en_HK |
dc.contributor.author | Xu, Z | en_HK |
dc.contributor.author | Yeung, KWK | en_HK |
dc.contributor.author | Yi, C | en_HK |
dc.date.accessioned | 2012-08-16T05:55:30Z | - |
dc.date.available | 2012-08-16T05:55:30Z | - |
dc.date.issued | 2011 | en_HK |
dc.identifier.citation | Designed Monomers And Polymers, 2011, v. 14 n. 6, p. 579-592 | en_HK |
dc.identifier.issn | 1385-772X | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/159747 | - |
dc.description.abstract | A novel pyridine-containing aromatic diamine monomer, 4-(4- trifluoromethylphenyl)-2,6-bis[3-(4-aminophenoxy)phenyl]pyridine (m,p-3FPAPP), was successfully synthesized by a modified Chichibabin reaction of 4-trifluoromethylbenzaldehyde and a substituted acetophenone, 3-(4-nitrophenoxy)acetophenone (m,p-NPAP), followed by a reduction of the resulting dinitro compound 4-(4-trifluoromethylphenyl)-2,6bis[3-(4-nitrophenoxy) phenyl] pyridine (m,p-3FPNPP) with Pd/C and hydrazine monohydrate. The aromatic diamine was employed to synthesize a series of pyridine-containing polyimides by polycondensation with various aromatic dianhydrides in N,N-dimethylformamide (DMF) via the conventional two-step method, and further thermal or chemical imidization forming polyimides. The inherent viscosities of the resulting poly(amic acid)s and polyimides were 0.62-0.89 and 0.58-0.69 dl/g, and most of the polyimides obtained by chemical imidization were readily soluble in common organic solvents such as DMF, N,N-dimethylacetamide (DMAc), N-methyl-2- pyrrolidone (NMP) and tetrahydrofuran (THF). Meanwhile, strong and flexible polyimide films were obtained, which had good thermal stability, with a glass transition temperature (T g) of 234.4-246.6°C and the temperature at 10% weight loss of 561.4-600.6°C in nitrogen atmosphere, and good optical transparency with the cut-off wavelengths of 369-378 nm, as well as outstanding mechanical properties with tensile strengths of 89.5-96.4 MPa, a tensile modulus of 1.52-1.63 GPa and elongation-at-break of 7.2-8.7%. The polyimide films also were found to possess low water uptake (0.61-0.79%). © 2011 Koninklijke Brill NV, Leiden. | en_HK |
dc.language | eng | en_US |
dc.publisher | V S P. The Journal's web site is located at http://www.brill.nl/m_catalogue_sub6_id9721.htm | en_HK |
dc.relation.ispartof | Designed Monomers and Polymers | en_HK |
dc.subject | fluorinated polyimides | en_HK |
dc.subject | light color | en_HK |
dc.subject | Pyridine-containing diamine | en_HK |
dc.subject | solubility | en_HK |
dc.subject | thermal stability | en_HK |
dc.subject | transparency | en_HK |
dc.title | Optical transparency and light colour of highly soluble fluorinated polyimides derived from a novel pyridine-containing diamine m, p-3FPAPP and various aromatic dianhydrides | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Yeung, KWK:wkkyeung@hkucc.hku.hk | en_HK |
dc.identifier.authority | Yeung, KWK=rp00309 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1163/156855511X598669 | en_HK |
dc.identifier.scopus | eid_2-s2.0-80055068272 | en_HK |
dc.identifier.hkuros | 204522 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-80055068272&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 14 | en_HK |
dc.identifier.issue | 6 | en_HK |
dc.identifier.spage | 579 | en_HK |
dc.identifier.epage | 592 | en_HK |
dc.identifier.isi | WOS:000297806300005 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Yan, S=36018779300 | en_HK |
dc.identifier.scopusauthorid | Chen, W=25925712200 | en_HK |
dc.identifier.scopusauthorid | Yan, W=39262757600 | en_HK |
dc.identifier.scopusauthorid | Huang, M=37039163300 | en_HK |
dc.identifier.scopusauthorid | Chen, C=36018145300 | en_HK |
dc.identifier.scopusauthorid | Xu, Z=12760201200 | en_HK |
dc.identifier.scopusauthorid | Yeung, KWK=13309584700 | en_HK |
dc.identifier.scopusauthorid | Yi, C=7101997365 | en_HK |
dc.identifier.issnl | 1385-772X | - |