Related Products of 2657-87-6In 2022, Zhang, Hao-Yang;Yuan, Li-Li;Hong, Wei-Jie;Yang, Shi-Yong published 《Improved Melt Processabilities of Thermosetting Polyimide Matrix Resins for High Temperature Carbon Fiber Composite Applications》. 《Polymers (Basel, Switzerland)》published the findings. The article contains the following contents:
With the goal of improving processability of imide oligomers and achieving of high temperature carbon fiber composite, a series of Thermosetting Matrix Resin solutions (TMR) were prepared by polycondensation of aromatic diamine (3,4′-oxybisbenzenamine, 3,4-ODA) and diester of biphenylene diacid (BPDE) using monoester of 4-phenylethynylphthalic acid (PEPE) as end-capping agent in Et alc. as solvent to afford phenylethynyl-endcapped poly(amic ester) resins with calculated mol. weight (Calc’d Mw) of 1500-10,000. Meanwhile, a series of reactive diluent solutions (RDm) with Calc’d Mw of 600-2100 were also prepared derived from aromatic diamine (4,4′-oxybisbenzenamine, 4,4-ODA), diester of asym. biphenylene diacid (α-BPDE) and monoester of 4-phenylethynylphthalic acid (PEPE) in Et alc. Then, the TMR solution was mixed with the RDm solution at different weight ratios to afford a series of A-staged thermosetting blend resin (TMR/RDm) solutions for carbon fiber composites. Exptl. results demonstrated that the thermosetting blend resins exhibited improved melt processability and excellent thermal stability. After being thermally treated at 200°C/1 h, the B-staged TMR/RDm showed very low melt viscosities and wider processing window. The min. melt viscosities of ≤50 Pa·s was measured at ≤368°C and the temperature scale at melt viscosities of ≤100 Pa·s were detected at 310-390°C, resp. The thermally cured neat resins at 380°C/2 h showed a great combination of mech. and thermal properties, including tensile strength of 84.0 MPa, elongation at breakage of 4.1%, and glass transition temperature (Tg) of 423°C, successively. The carbon fiber reinforced polyimide composite processed by autoclave technique exhibited excellent mech. properties both at room temperature and 370°C. This study paved the way for the development of high-temperature resistant carbon fiber resin composites for use in complicated aeronautical structures. And 3-(4-Aminophenoxy)aniline (cas: 2657-87-6) was used in the research process.
3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Related Products of 2657-87-6Ethers do have nonbonding electron pairs on their oxygen atoms, however, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds.
Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem