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Magnetic and Heat Resistant Poly(imide-ether) Nanocomposites Derived from Methyl Rich 9H-xanthene: Synthesis and Characterization. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-018-2094-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Behniafar H, Yazdi M, Farshad S, Malekshahinezhad K. Poly(4,4′-oxydiphenylene-pyromellitimide) loaded by NH2-functionalized silica. HIGH PERFORM POLYM 2016. [DOI: 10.1177/0954008315623352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this research, silica nanopowder is surface modified via a facile urethanation reaction to obtain silicon dioxide (SiO2) nanoparticles possessing amine (NH2)-functionalized organic moieties. Poly(4,4′-oxydiphenylene-pyromellitimide) as one of the most widely used polyimides (PIs) is then uniformly loaded by these organically modified nanoparticles (approximately 5% by weight) during its synthesis process at the thermal cyclodehydration stage of the corresponding poly(amic acid) precursor. Amine-functionalized SiO2 nanoparticles (SiO2∼NH2) and the resulting PI-based nanocomposites (PI/SiO2 and PI/SiO2∼NH2) are thoroughly characterized by Fourier transform infrared spectroscopy, diffuse reflectance ultraviolet–visible, X-ray diffraction, and scanning electron microscopy. Thermogravimetric analyses/derivative thermogravimetry thermograms obviously show that about 22% (by weight) of the nano-SiO2 particles is formed by organic moieties. Moreover, the thermostability order is found to be PI/SiO2 > PI/SiO2∼NH2 > neat PI. The nanocomposite PI/SiO2∼NH2 shows a two-step thermal decomposition pattern; the first step is due to the scission of the organic part from the nanoparticles loaded. According to the slope changes of the differential thermal analyses curves, the first-order phase transition could be found at the thermal range of 300–400°C. This transition, however, is not so clear for PI/SiO2 and PI/SiO2∼NH2 nanocomposites due to the interaction of nano-SiO2 particles with PI matrix.
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Affiliation(s)
- Hossein Behniafar
- Faculty of Chemistry, Polymer-Organic Group, Damghan University, Damghan, Iran
| | - Mojtaba Yazdi
- Faculty of Chemistry, Polymer-Organic Group, Damghan University, Damghan, Iran
| | - Saeede Farshad
- Faculty of Chemistry, Polymer-Organic Group, Damghan University, Damghan, Iran
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Jeong KM, Li YH, Lee HG, Ha CS. Effects of alicyclic moiety incorporation on the properties of polyimide/silica hybrid films. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3802] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Keuk-Min Jeong
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Korea
| | - Yu-Heng Li
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Korea
| | - Hyeok-Gi Lee
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Korea
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Korea
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Development of novel coatable compatibilized polyimide-modified silica nanocomposites. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0459-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Akhter T, Park OO, Siddiqi HM, Saeed S, Saoud KM. An investigation of physico-chemical properties of a new polyimide–silica composites. RSC Adv 2014. [DOI: 10.1039/c4ra06025c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
In the present study, a novel diamine 1,4-bis[4-(hydrazonomethyl)phenoxy]butane (4-BHPB) has been successfully synthesized by a facile method.
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Affiliation(s)
- T. Akhter
- Department of Chemical and Biomolecular Engineering (BK21+ Graduate Program)
- KAIST
- Daejeon 305-701, Republic of Korea
| | - O. Ok Park
- Department of Chemical and Biomolecular Engineering (BK21+ Graduate Program)
- KAIST
- Daejeon 305-701, Republic of Korea
| | - H. M. Siddiqi
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad 45320, Pakistan
| | - S. Saeed
- Department of Metallurgy and Materials Engineering
- Pakistan Institute of Engineering and Applied Sciences (PIEAS)
- Islamabad 45650, Pakistan
- Department of Liberal Arts and Sciences
- Virginia Commonwealth University in Qatar
| | - Khaled Mohammad Saoud
- Department of Liberal Arts and Sciences
- Virginia Commonwealth University in Qatar
- Doha, Qatar
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Gu Z, Zhang P, Han Q, Huang Q, Kang M, Huang Y. Synthesis and characterization of novel fluorosilicone polyimides with high optical transparency. HIGH PERFORM POLYM 2013. [DOI: 10.1177/0954008313514084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To overcome insoluble and low transmittance of the traditional polyimides (PIs), two kinds of novel fluorosilicone PIs were prepared. First, 1,4-bis (4-amino-2-trifluoromethylphenoxy) benzene, compound 3a, and 4,4′-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether, compound (3b), with 2-chloro-5-nitrobenzotrifluoride and p-hydroquinone or 4,4′-dihydroxydiphenyl ether were prepared. Second, hydrosilylation of nadic anhydride (NA) with 1,1,3,3-tetramethyldisiloxane (TMDS) yielded 5,5′-(1,1,3,3-tetramethyl-1,3-disiloxanediyl) bisnorbornane-2,3-dicarboxylic anhydride, compound (4). Initially, the conditions of the synthesis reaction such as reaction temperature, catalyst dosage, molar ratio of TMDS/NA, and reaction time on yield of compound 4 by the single factor approach were studied. The optimal reaction conditions were reaction temperature: 90°C, catalyst dosage: 1 ml (Pt% = 0.37%), molar ratio of TMDS/NA: 1/1.8, and reaction time: 3 h. The yield was 74.6%. Finally, two kinds of new organosoluble, light-colored, and good thermal stable fluorosilicone PI compounds (5a-5b) were synthesized from compounds 3a-3b and 4 and 4,4′-hexafluoroisopropylidenediphthalic anhydride), prepared through a typical two-step polymerization method. The solubility of the novel fluorosilicone PI films of compounds 5a-5b and the traditional PI film (4,4′-diaminodiphenyl ether (ODA)-biphenyltetracarboxylic dianhydride, DIY) were contrasted. The result showed that the fluorosilicone PI films have good solubility. These PIs were soluble in amide polar solvents and even in less polar solvents. The glass transition temperatures of compounds 5a-5b were 229.1 and 186.7°C and the 5% and 10% weight-loss temperatures were 519.8°C and 539°C, respectively. These films had cutoff wavelengths of 331.8 and 318.6 nm. Due to these properties, these PIs could be used as aerospace, photoelectric, and microelectronic materials.
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Affiliation(s)
- Zheng Gu
- School of Materials Science and Engineering, Southwest University of Science and Technology, People’s Republic of China
| | - Ping Zhang
- School of Materials Science and Engineering, Southwest University of Science and Technology, People’s Republic of China
| | - Qingxia Han
- School of Materials Science and Engineering, Southwest University of Science and Technology, People’s Republic of China
| | - Qiang Huang
- School of Materials Science and Engineering, Southwest University of Science and Technology, People’s Republic of China
| | - Ming Kang
- School of Materials Science and Engineering, Southwest University of Science and Technology, People’s Republic of China
| | - Yuhong Huang
- Institute of Systemic Engineering, China Academy of Engineering Physics (CAEP), People’s Republic of China
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Akhter T, Saeed S, Siddiqi HM, Park OO, Ali G. Synthesis and characterization of novel coatable polyimide-silica nanocomposites. JOURNAL OF POLYMER RESEARCH 2013. [DOI: 10.1007/s10965-013-0332-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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