20638-32-8Relevant articles and documents
Inexpensive synthesis of 1,4-bis(4-aminophenoxy)-2- (6-oxido-6H-dibenz oxaphosphorin-6-yl) phenylene and its oxygen-plasma resistant polyamides
Lin, Ching Hsuan,Chang, Sheng Lung,Fang, Yu Ting,Hwang, Hann Jang,Tsai, Cheng Hsien
, p. 414 - 421 (2010)
Inexpensive synthesis of diamine, 1,4-bis(4-nitrophenoxy)-2-(6-oxido-6H-dibenz oxaphosphorin-6-yl) phenylene was revealed in this work. Based on the diamine, a series of organosoluble polyamides were prepared by direct polycondensation of the diamine with various aromatic diacids using triphenyl phosphite and pyridine as condensing agents. The number-average molecular weights of the resulting polyamides range from 4.2?×?104 to 10.5?×?104?g/mol, and the weight-average molecular weights are in the range of 7.5-28.2?×?104?g/mol. The Tgs of these polyamides range from 210 to 255?°C by dynamic mechanical analysis. The resulting polyamides are tough and flexible with tensile strength, elongation at break and moduli range from 84 to 101?MPa, 4.8-7.0%, and 2.36-3.22?GPa, respectively. The degradation temperatures (Td 5%) and char yields at 800?°C in nitrogen range from 460 to 486?°C and 59-68?wt%, respectively. The cutoff wavelength of these polyamides falls in the range of 345-366?nm, showing a very light color characteristic. In addition, these polyamides display good oxygen plasma resistance.
A double 1, 4 - (4 - nitrophenoxy) benzene mechanical chemical synthesis method (by machine translation)
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Paragraph 0020-0032, (2019/10/04)
The invention relates to a 1, 4 - double-(4 - nitrophenoxy) benzene mechanical chemical synthesis method, in particular to a metal salt catalytic lower mechanical force to promote of hydroquinone with the nitro relevent aniline synthesis of 1, 4 - double-(4 - nitrophenoxy) benzene green synthesis method. The specific method is: the ball mill pot and adding hydroquinone and nitro relevent aniline, then adding catalyst, alkali, silica gel and grinding ball, mechanical chemical reaction, after the reaction, the organic solvent used for the transfer of the reaction mixture, filtering the insoluble matter, the filtrate is concentrated by recrystallization, to obtain yellow-green crystal product 1, 4 - double-(4 - nitrophenoxy) benzene. The advantage of this invention lies in simple operation, reaction time is short, the atom economy is high, the resulting high product yield, purity of 99% or more, and is suitable for industrial use. (by machine translation)
Functionalized MWCNTs, an efficient reinforcement for the preparation of eugenol based high performance PBz/BMI/CNT nanocomposites exhibiting outstanding thermo-mechanical properties
Periyasamy, Thirukumaran,Asrafali, Shakila Parveen,Kim, Seong-Cheol
, p. 6607 - 6615 (2017/07/17)
The chemistry of benzoxazine synthesis offers wide molecular design flexibility and thus facilitates preparation of various polybenzoxazine based composites. In this paper, we reported the preparation of polybenzoxazine/BMI blend and subsequent preparation of nanocomposites with amine functionalized multiwalled carbon nanotubes (F-MWCNTs). The curing mechanism and the material properties of the blend and nanocomposites were studied extensively. DSC analysis showed two exothermic maxima, corresponding to benzoxazine and allyl group polymerization. Furthermore, by the incorporation of F-MWCNTs into the PBz/BMI system, the properties of the PBz/BMI/F-MWCNT nanocomposites were improved significantly. The enhancement in the material properties is due to the strong interaction between the F-MWCNTs and PBz, resulting in the formation of interpenetrating polymer networks. The morphology and fracture surface of the nanocomposites were studied by scanning electron microscopy. The thermal, mechanical and dielectric properties of the nanocomposites are found to be outstanding when compared with the neat PBz and PBz/BMI blend.
