Recommanded Product: 99-93-4. Zhang, XL; Sheng, SR; Pan, Y; Huang, ZZ; Liu, XL in [Zhang, Xiao-Lan; Sheng, Shou-Ri; Pan, Yang; Huang, Zhen-Zhong; Liu, Xiao-Ling] Jiangxi Normal Univ, Minist Educ, Key Lab Funct Small Organ Mol, Nanchang 330022, Jiangxi, Peoples R China published Organosoluble, low dielectric constant and highly transparent fluorinated pyridine-containing poly(ether imide)s derived from new diamine: 4-(4-trifluoromethyl)phenyl-2,6-bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]pyridine in 2019.0, Cited 31.0. The Name is 4′-Hydroxyacetophenone. Through research, I have a further understanding and discovery of 99-93-4.
A new aromatic diamine, 4-(4-trifluoromethyl)phenyl-2,6-bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]pyridine, was synthesized by a modified Chichibabin reaction of 4-(4-nitro-2-trifluoromethylphenoxy)acetophenone with 4-triflouromethylbenzaldehyde, followed by catalytic reduction. A series of fluorinated pyridine-containing aromatic poly(ether imide)s (PEIs) were prepared from the diamine monomer with various aromatic dianhydrides via conventional two-step thermal imidization method. The resulting PEIs had inherent viscosities values of 0.68-0.90 dL/g, and could be cast and thermally converted into transparent, flexible, and tough polymer films. These PEIs were predominantly amorphous, had good solubility in common solvents such as NMP, DMAc and m-cresol at room temperature, and displayed excellent thermal stability with the glass transition temperatures of 258-315 degrees C, the temperatures at 5% weight loss of 550-585 degrees C, and the residue of higher than 55% at 750 degrees C in nitrogen. Moreover, the PEIs films showed outstanding mechanical properties with tensile strengths of 74.8-103.5 MPa, tensile moduli of 1.08-1.45 GPa, and elongations at break of 10.6-24.4%. These PEIs also exhibited low dielectric constants of 2.81-2.98 (1 MHz) and water uptake 0.39-0.68%, as well as high optical transparency with the UV cutoff wavelength in the 350-378 nm range and the wavelength of 80% transparency in the range of 412-510 nm. [GRAPHICS] . A series of fluorinated pyridine-containing poly( ether imide) s derived from a new diamine 4-( 4-trifluoromethyl) phenyl-2,6-bis[ 4-( 4-amino-2-trifluoromethylphenoxy) phenyl] pyridine with various dianhydrides were investigated. The resulting polymers exhibited improved solubility, high optical transparency and low dielectric constants, combined with good thermal and mechanical properties.
Recommanded Product: 99-93-4. Welcome to talk about 99-93-4, If you have any questions, you can contact Zhang, XL; Sheng, SR; Pan, Y; Huang, ZZ; Liu, XL or send Email.
Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles