Browse > Article
http://dx.doi.org/10.7473/EC.2017.52.2.143

Properties of Poly(benzoxazole) Copolymer Films Containing Quinoxalinedioxy/Pyridinedioxy Unit  

Park, A Ram (Dept. of Biochemical & Polymer Engineering, Chosun University)
Lee, Eung Jae (Dept. of Bioenvironmental & Chemical Engineering, Chosun College of Science & Technology)
Choi, Jae Kon (Dept. of Biochemical & Polymer Engineering, Chosun University)
Publication Information
Elastomers and Composites / v.52, no.2, 2017 , pp. 143-153 More about this Journal
Abstract
Herein we studied the characterization of the PBO films formed via solution casting and thermal cyclization of poly(o-hyroxyamide)s(PHAs) that were synthesized by direct polycondensation of 3,3'-dihydroxybenzidine with 4,4'-(2,3-quinoxalinedioxy) dibenzoic acid and/or 4,4'-(2,3-pyridinedioxy) dibenzoic acid. All the PHAs exhibited inherent viscosities in the range of 0.55~0.84 dL/g in DMAc solution. The copolymers, CPH-2-5, were partially soluble in less polar solvents like pyridine and THF. However, all the PBOs were not soluble in polar solvents, but only partially soluble in sulfuric acid. The temperatures corresponding to 10% weight loss of the PBOs with increasing content of quinoxalinedioxy unit were higher than those of the PHAs, and the char yields at $900^{\circ}C$ in $N_2$, tensile strength, and initial modulus of the PBOs were 1.1~1.3 times, 1.2~1.8, and 1.6~3.3 times higher, respectively, than those of the PHAs. The LOI value of CPB-2 was 38.5%, while that of CPB-1 was the highest at 40.0%. The LOI test confirmed that excellent flame retardants were synthesized.
Keywords
PBO; thermal cyclization; direct polycondensation reaction; char yields; LOI;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 G. S. Liou and S. H. Hsiao, "Preparation and Characterization of Aromatic Polybenzoxazoles Bearing Ether and 1,4-naphthalene or 2,6-naphthalene Units in the Main Chain", Macromol. Chem. Phys., 201, 42 (2000).   DOI
2 S. H. Hsiano and J. H. Chiou, "Aromtic Polybenzoxazoles containing Ethersulfone linkages", J. Polym. Sci. Part A, Polym. Chem., 39, 2262 (2001).   DOI
3 T. Fukumaru, Y. Saegusa, T. Fujigaya, and N. Nakashima, "Fabrication of Poly(p-phenylenebenzoxazole) Film Using a Soluble Poly(o-alkoxyphenylamine) as the Precursor", Macromol., 47, 2088 (2014).   DOI
4 H. W. Jang, S. B. Lee, and J. K. Choi, "Synthesis and Thermal Properties of Poly(benzoxazole)s Based on Pendants", Elast. Compos., 50, 138 (2015).   DOI
5 G. W. Ehrenstein, "Polymeric Materials", p. 4, Hanser, Cincinnati, 2001.
6 S. H. Hsiao, G. S. Liou, Y. C. Kung, and Y. J. Lee, "Synthesis and Characterization of Electrochromic Poly(amide-imide)s Based on the Diimide-diacid from 4,4'-diamino-4''-methoxytriphenylamine and Trimellitic anhydride", Eur. Polym. J., 46, 1355 (2010).   DOI
7 N. V. Sadavarate, C. V. Avadhani, P. V. Naik, and P. P. Wadgaonkar, "Regularly Alternating Poly(amideimide)s Containing Pendent Pentadecyl Chains: Synthesis and Characterization", Eur. Polym. J., 46, 1307 (2010).   DOI
8 J. G. Hilborn, J. W. Labadie, and J. L. Hedrick, "Poly(aryl ether-benzoxazoles)", Macromol., 23, 28554 (1999).
9 G. Maglio, R. Palumbo, and M. Tortora, "Aromatic Poly(benzoxazole) s from Multiring Diacides Containing (Phenylenedioxy) diphenylene or (Naphthalenedioxy)diphenylene Groups: Synthesis and Thermal Properties", J. Polym. Sci. Part A: Polym. Chem., 38, 1172 (2000).   DOI
10 J. L. Hedrick, J. G. Hilborn, T. D. Palmer, J. W. Labadie, and W. Volksen, "Imide-aryl Ether Benzoxazole Block Copolymers", J. Polym. Sci. Part A, Polym. Chem., 28, 2255 (1990).   DOI
11 Q. Fu, Q. Zhuang, X. Liu, and Z. Han, "Enhanced solubility of novel poly(benzoxazole)s with a soft linkage and a rigid pendant group", Society of Chemical Industry, Polym Int., 62, 721 (2013).
12 H. W. Jo, "Synthesis and Properties of New Poly(hydroxyamide) s Having Bulky Groups", MSc Thesis, Chosun University, Korea (2010).
13 M. Hasegawa and A. Tominaga, "Fluorene-contaning poly-(ester imide)s and their Application to Positive-Type Photosensitive Heat-Rssistant Materials", Macromol. Mater. Eng., 296, 1002 (2011).   DOI
14 J. H. Chang, M. J. Chen, and R. J. Farris, "Effect of Heat Treament on the Thermal and Mechanical Properties of a Precursor: Polyhydroxy Amide", Polymer, 39, 5649 (1998).   DOI
15 S. B. Lee, E. J. Lee, and J. K. Chol, "Preparation and Properties of Polybenzoxazole Copolymers Bearing Pendants and Imide Ring in the Main Chain", Elast. Compos., 51, 195 (2016).   DOI
16 Y. Maruyama, Y. Oishi, M. Kakimoto, and Y. Imai, "Synthesis and Properties of Fluorine-Containing Aromatic Poly(benzoxazole) s from Bis(o-aminophenols) and Aromatic Diacid Chlorides by the Silylation Method", Macromolecules, 21, 2305 (1998).
17 J. Y Sohn, S. C. Moon, D. S. Yoon, and J. K. Choi, "Preparation and Properties of Aromatic Polybenzoxazoles with high char yields", Elast. Compos., 42, 2388 (2007).
18 D. S. Yoon, J. K. Choi, and B. W. Jo, "Synthesis and Characterization of PBO Precursors Containing Dimethylphenoxy and/or MPEG Pendant Groups", Polymer(Korea), 29, 493 (2005).
19 J. S. Sohn, A. R. Park, and J. K. Choi, "Synthesis and Characterization of Fluorinated Polybenzoxazole Copolymers", Elast. Compos., 50, 175 (2015).   DOI
20 S. H. Hsiao and C. F. Chang, "Synthesis and Properties of Aromatic Polyamides Based on 4,4'-[1,4(1,3 or 1,2)-phenylenedioxy] dibenzoic acid", Macromol. Chem. Phys., 197, 1255 (1996).   DOI
21 D. Y. Wee, J. W. Han, and J. K. Choi, "Preparation and Characteristics of the Blends of Polyimides and Polybenzoxazole Having Imide Ring", Polymer(korea), 37, 420 (2013).
22 A. R. Park for MSc degree, Chosun University, Gwangju, Korea (2017).
23 S. Wang, Y. Hu, Z. Li, Z. Whang, Y. Zhuang, Z.Chen, and W. Fan, "Flammability and Phase-transition Studies of Nylon 6/Montmorillonites", Collid Polym. Sci., 281, 951 (2003).   DOI
24 www. textopia.or.kr: 이승용,"수퍼섬유와 그 용도 전개", http://textopia.or.kr/new/02_technology/technology_02.do?bbs=texbasetech&no=000000000056&curpage=13&pageNum=&subNum=&bMode=VIEW (2008).