SYNTHESIS AND CHARACTERIZATION OF A SERIES OF POLYBENZOBISOXAZOLES

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	SYNTHESIS AND CHARACTERIZATION OF A SERIES OF POLYBENZOBISOXAZOLES
其他题名	SYNTHESIS AND CHARACTERIZATION OF A SERIES OF POLYBENZOBISOXAZOLES
	Cui Tianfang 1; Chen Ping 1; Lu Chun 2; Qi Wen 1
	2010
发表期刊	ACTA POLYMERICA SINICA
ISSN	1000-3304
期号	2 页码:173-177
摘要	A series of polybenzobiso xazoles, including PBO, poly(1,4-naphthalene benzobisoxazole) (1,4-PNBO), poly (2,6-naphthalene benzobi soxazole) (2, 6-PNBO), poly (2, 5-thiophene benzobisoxazole) (PTBO) and poly-4, 4'-(1, 2-diphynylethylene benzobisoxazole 4, 4'-PDPEBO), were synthesized by polycondensation of 4, 6-diamino-1,3-benzenediol dihydrochloride with terephthalic acid, I, 4-naphthalene dicarboxylic acid, 2, 6-naphthalenedicarboxylic acid, 2, 5-thiophenedicarboxylic acid and 4, 4'-(1, 2-diphynylethylene)dicarboxylic acid in polyphosphoric acid, and the relationship between the resulting polymer chain structures and the properties of the polybenzobisoxazoles was investigated. The results showed that the target polymers were Successfully Synthesized proved by Fourier transform infrared spectra and elemental analysis. And the thermal stability of PBO, I 4-PNBO, 4 4'-PDPEBO, 2, 6-PNBO and PTBO decreased in turn from thermal gravimetric analysis. The reasons are that 1,4-phenylene chains in the PBO possesses the best rigidity among all the polybenzobisoxazole chains. And C C bonds in ethylidene of 4 4'-PDPEBO are easy to be broken under high temperature, even though 4 4'-PDPEBO has two phenylene chains, and so 4 4'-PDPEBO has worse thermal resistance compared with PBO and I 4-PNBO. Bond energy of C-S bonds in PTBO chains is less than that of C C bonds or C-C bonds in other polybenzobisoxazoles, and so PTBO possesses the worst thermal resistance among all the polybenzobisoxazoles. The intrinsic viscosity of PBO, 4, 4'-PDPEBO, I 4-PNBO, 2,6-PNBO and PTBO decreased in turn, and the data were 25. 40, 20. 63, 16. 76, 15. 38, 14. 63 dL/g, respectively. The main reasons are that linearity and symmetry of I 4-phenylene group, 4 4'-(1,2-diphynyl) ethylene group, 1, 4-naphthalene group, 2, 6-naphthalene group and 2, 5-thiophene group decreased in turn, and the stereo-hindrance effect of these groups increased in turn.
关键词	Polybenzobisoxazoles Poly(1,4-phenylene benzobisoxazole) Synthesis Thermal stability
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:3822952
引用统计	被引频次：2[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/146637
专题	中国科学院金属研究所
作者单位	1.大连理工大学 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Cui Tianfang,Chen Ping,Lu Chun,et al. SYNTHESIS AND CHARACTERIZATION OF A SERIES OF POLYBENZOBISOXAZOLES[J]. ACTA POLYMERICA SINICA,2010(2):173-177.
APA	Cui Tianfang,Chen Ping,Lu Chun,&Qi Wen.(2010).SYNTHESIS AND CHARACTERIZATION OF A SERIES OF POLYBENZOBISOXAZOLES.ACTA POLYMERICA SINICA(2),173-177.
MLA	Cui Tianfang,et al."SYNTHESIS AND CHARACTERIZATION OF A SERIES OF POLYBENZOBISOXAZOLES".ACTA POLYMERICA SINICA .2(2010):173-177.