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Yi L, Huang W, Yan D. Polyimides with side groups: Synthesis and effects of side groups on their properties. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28409] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lang Yi
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites; Shanghai Jiao Tong University, 800 Dongchuan Road; Shanghai 200240 People's Republic of China
| | - Wei Huang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites; Shanghai Jiao Tong University, 800 Dongchuan Road; Shanghai 200240 People's Republic of China
| | - Deyue Yan
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites; Shanghai Jiao Tong University, 800 Dongchuan Road; Shanghai 200240 People's Republic of China
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Wang S, Yang G, Wu S, Ren G, Yang W, Liu X. Preparation of solution-processable colorless polyamide-imides with extremely low thermal expansion coefficients through an in-situ silylation method for potential space optical applications. E-POLYMERS 2016. [DOI: 10.1515/epoly-2016-0100] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractSeveral tough and flexible fluorinated polyamide-imide films were prepared from trimellitic anhydride chloride and 2,2′-bis(trifluoromethyl)benzidine through a facile one-pot in-situ silylation method. By incorporating fluorinated side groups, the solubility of the prepared polyamide-imide was greatly enhanced. Meanwhile, due to their linear chain configuration and the existence of hydrogen bonding, the prepared polyamide-imide films revealed high tensile strength, high tensile modulus, high glass transition temperature (Tg) and most interestingly, very low coefficient of thermal expansion (CTE) of 11 ppm/°C. Copolymerization with pyromellitic dianhydride (PMDA) led to an extremely low CTE of 4 ppm/°C which should be among the lowest values available for soluble polyamide-imides. The optical homogeneity and stress homogeneity of the obtained polyamide-imide films were also tested. After non-contact with substance and thermal treatment at 300°C, they revealed a better optical homogeneity and stress homogeneity than that of the commercially available Kapton polyimide (PI) films, with a PV value of 0.915 λ and RMS value of 0.163 λ. Thus, these colorless and soluble polyamide-imide films simultaneously possessing promising optical imaging performance are good candidates as novel diffractive membrane optical system architectures.
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Affiliation(s)
- Song Wang
- 1Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, P.R. China
| | - Guangjie Yang
- 2College of Polymer Science and Engineering, Sichuan University, Chengdu, P.R. China
| | - Shibin Wu
- 1Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, P.R. China
| | - Ge Ren
- 1Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, P.R. China
| | - Wei Yang
- 1Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, P.R. China
| | - Xikui Liu
- 2College of Polymer Science and Engineering, Sichuan University, Chengdu, P.R. China
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Hahm SG, Lee SW, Suh J, Chae B, Kim SB, Lee SJ, Lee KH, Jung JC, Ree M. Rubbed Thin Films of Well-defined Brush Polyimides for Flat-Panel Liquid Crystal Displays: Surface Morphology, Molecular Orientation, and Liquid Crystal Alignability. HIGH PERFORM POLYM 2016. [DOI: 10.1177/0954008306068117] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A series of well-defined brush polyimide (PI) composed of two 4- n-alkyloxyphenyloxy bristles per repeat unit on a semi-rigid poly(4,4′-methylenyldiphenylene pyromellitimide), Cm-PMDA-MDA PIs, were synthesized and their nanoscale thin films prepared by conventional spin-coating of their soluble poly(amic acid) precursor solutions and subsequent drying and thermal imidization in a nitrogen atmosphere. All the PIs were determined to be a positively birefringent polymer. The surface morphology and molecular orientation of each PI in films before and after rubbing were investigated in detail by atomic force microscopy, optical retardation analysis, and linearly polarized infrared spectroscopy. The sequence of the rubbing-induced polymer segmental orientations was further investigated in detail. In addition, the liquid crystal alignment and pretilt ability of the rubbed PI films were examined, and their thermal stability investigated. The present study provides important information on the sequence of the polymer segmental orientations induced by rubbing and additionally the mechanisms of the alignment and pretilt of liquid crystal molecules in contact with the rubbed PI film surface.
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Affiliation(s)
- Suk Gyu Hahm
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
| | - Seung Woo Lee
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
| | - Jinsuk Suh
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
| | - Boknam Chae
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
| | - Seung Bin Kim
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
| | - Seong Joon Lee
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
| | - Kyung Hoon Lee
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
| | - Jin Chul Jung
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
| | - Moonhor Ree
- Department of Chemistry, Polymer Research Institute, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science and Technology (Postech), Pohang 790-784, Republic of Korea
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Zhang A, Ding D, Ren J, Zhu X, Yao Y. Synthesis, characterization, and drug-release behavior of amphiphilic quaternary ammonium chitosan derivatives. J Appl Polym Sci 2013. [DOI: 10.1002/app.39890] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Aidi Zhang
- College of Chemistry and Chemical Engineering; Shanghai University of Engineering Science; 333 Longteng Road Shanghai 201620 People's Republic of China
- College of Chemistry and Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; 800 Dongchuan Road Shanghai 200240 People's Republic of China
| | - Derun Ding
- College of Chemistry and Chemical Engineering; Shanghai University of Engineering Science; 333 Longteng Road Shanghai 201620 People's Republic of China
| | - Jicun Ren
- College of Chemistry and Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; 800 Dongchuan Road Shanghai 200240 People's Republic of China
| | - Xiangli Zhu
- College of Chemistry and Chemical Engineering; Shanghai University of Engineering Science; 333 Longteng Road Shanghai 201620 People's Republic of China
| | - Youhong Yao
- College of Chemistry and Chemical Engineering; Shanghai University of Engineering Science; 333 Longteng Road Shanghai 201620 People's Republic of China
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Maiti DK, Banerjee A. A Synthetic Amino Acid Residue Containing A New Oligopeptide-Based Photosensitive Fluorescent Organogel. Chem Asian J 2012; 8:113-20. [DOI: 10.1002/asia.201200617] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 08/09/2012] [Indexed: 12/17/2022]
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Seçkin T, Köytepe S, Yigˇit M, Çetinkaya E. Synthesis and characterization of polyimides containing a chiral dimine link that mimics the salen ligand. Des Monomers Polym 2012. [DOI: 10.1163/1568555041475248] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Seckin T, Köytepe S, Çetinkaya B, Özdemir İ, Yigit B. Synthesis and properties of novel polyimides from dichloro (1,3-p-dimethylaminobenzylimidazolidine-2-ylidene) p-cymene ruthenium (II). Des Monomers Polym 2012. [DOI: 10.1163/156855503768338232] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Hahm SG, Jin KS, Park S, Ree M, Kim HS, Kwon SK, Kim YH. The alignment of liquid crystals on the film surfaces of soluble aromatic polyimides bearingt-butylphenyl and trimethylsilylphenyl side groups. Macromol Res 2009. [DOI: 10.1007/bf03218645] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lee SB, Shin GJ, Chi JH, Zin WC, Jung JC, Hahm SG, Ree M, Chang T. Synthesis, characterization and liquid-crystal-aligning properties of novel aromatic polypyromellitimides bearing (n-alkyloxy)biphenyloxy side chains. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.07.036] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hahm SG, Lee TJ, Chang T, Jung JC, Zin WC, Ree M. Unusual Alignment of Liquid Crystals on Rubbed Films of Polyimides with Fluorenyl Side Groups. Macromolecules 2006. [DOI: 10.1021/ma060956f] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Suk Gyu Hahm
- Polymer Research Institute, Department of Chemistry, National Research Lab for Polymer Synthesis & Physics, Center for Integrated Molecular Systems, BK School of Molecular Science, and Department of Materials Science & Engineering, Pohang University of Science & Technology (Postech), Pohang 790-784, Republic of Korea
| | - Taek Joon Lee
- Polymer Research Institute, Department of Chemistry, National Research Lab for Polymer Synthesis & Physics, Center for Integrated Molecular Systems, BK School of Molecular Science, and Department of Materials Science & Engineering, Pohang University of Science & Technology (Postech), Pohang 790-784, Republic of Korea
| | - Taihyun Chang
- Polymer Research Institute, Department of Chemistry, National Research Lab for Polymer Synthesis & Physics, Center for Integrated Molecular Systems, BK School of Molecular Science, and Department of Materials Science & Engineering, Pohang University of Science & Technology (Postech), Pohang 790-784, Republic of Korea
| | - Jin Chul Jung
- Polymer Research Institute, Department of Chemistry, National Research Lab for Polymer Synthesis & Physics, Center for Integrated Molecular Systems, BK School of Molecular Science, and Department of Materials Science & Engineering, Pohang University of Science & Technology (Postech), Pohang 790-784, Republic of Korea
| | - Wang-Cheol Zin
- Polymer Research Institute, Department of Chemistry, National Research Lab for Polymer Synthesis & Physics, Center for Integrated Molecular Systems, BK School of Molecular Science, and Department of Materials Science & Engineering, Pohang University of Science & Technology (Postech), Pohang 790-784, Republic of Korea
| | - Moonhor Ree
- Polymer Research Institute, Department of Chemistry, National Research Lab for Polymer Synthesis & Physics, Center for Integrated Molecular Systems, BK School of Molecular Science, and Department of Materials Science & Engineering, Pohang University of Science & Technology (Postech), Pohang 790-784, Republic of Korea
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Ree M. High performance polyimides for applications in microelectronics and flat panel displays. Macromol Res 2006. [DOI: 10.1007/bf03219064] [Citation(s) in RCA: 160] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Liu X, Tang J, Wang J, Gu Y. Introduction of side chains containing biphenyl unit on the crystalline morphology and properties of polyimides. J Appl Polym Sci 2006. [DOI: 10.1002/app.23611] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lee SW, Chae B, Hahm SG, Lee B, Kim SB, Ree M. Rubbed films of isomeric poly(4-vinylpyridine) and poly(2-vinylpyridine): surface morphology, molecular orientation, and liquid crystal alignability. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.03.085] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Lee SW, Lee SJ, Hahm SG, Lee TJ, Lee B, Chae B, Kim SB, Jung JC, Zin WC, Sohn BH, Ree M. Role of the n-Alkyl End of Bristles in Governing Liquid Crystal Alignment at Rubbed Films of Brush Polymer Rods. Macromolecules 2005. [DOI: 10.1021/ma047856z] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Seung W. Lee
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Seong J. Lee
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Seok G. Hahm
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Taek J. Lee
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Byeongdu Lee
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Boknam Chae
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Seung B. Kim
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Jin C. Jung
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Wang C. Zin
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Byeong H. Sohn
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
| | - Moonhor Ree
- Polymer Research Institute, Department of Chemistry, Division of Molecular and Life Sciences, BK21 Program, and Department of Materials Science & Engineering, Pohang University of Science & Technology, San 31, Hyoja-dong, Pohang 790−784, Republic of Korea
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Liu X, Xiang H, Yang J, Gu Y. Preparation and properties of novel polyimides with side chains containing biphenyl units. J Appl Polym Sci 2003. [DOI: 10.1002/app.13030] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Padmavathy T, Srinivasan KSV. Synthesis and properties of segmented main-chain liquid-crystalline polyurethanes with a high aspect ratio mesogenic diol as a chain extender. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/pola.10237] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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