Recommanded Product: 100-19-6. Liu, CJ; Mei, M; Zang, LM; Zhou, HF; Huang, XH; Wei, C in [Liu, Chanjuan; Mei, Mei; Zang, Limin; Zhou, Huanfu; Huang, Xiaohua; Wei, Chun] Guilin Univ Technol, Collaborat Innovat Ctr Explorat Hidden Nonferrous, Key Lab New Proc Technol Nonferrous Met & Mat, Minist Educ,Sch Mat Sci & Engn, Guilin 541004, Peoples R China published Highly Thermally Stable, Organosoluble, and Hydrophobic Polyimides with Pyrrolidinylphenyl Pendant Groups and Pyridine Units in 2019.0, Cited 37.0. The Name is 1-(4-Nitrophenyl)ethanone. Through research, I have a further understanding and discovery of 100-19-6.
A novel diamine monomer, 4-{4-(1-pyrrolidinyl)phenyl}-2,6-bis(4-aminophenyl) pyridine (PPAP), was synthesized using 4-(1-pyrrolidinyl)benzaldehyde as starting material, and a series of aromatic polyimides were prepared using PPAP and five aromatic dianhydrides by a two-step imidization method. The structure and properties of as-prepared polyimides were studied by Fourier transform infrared spectrometer (FTIR), nuclear magnetic resonance (NMR), thermogravimetric analysis (TG), differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD). The results indicated that these polymers had good solubility in highboiling organic solvents upon heating, such as N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO) and N-methyl-2-pyrrolidone (NMP). Furthermore, they had outstanding thermal properties with the glass transition temperature (T-g) exceeding 354 degrees C, as well as T-5% and T-10% mass loss temperature under a nitrogen atmosphere in the range of 521534 oC and 544594 oC, respectively. Moreover, they exhibited excellent hydrophobic properties with the contact angles ranging from 82.7 to 90.5 degrees. In addition, the results of WAXD showed that these polyimides exhibited the structure of amorphous polymers.
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Reference:
Benzodioxan,
,1,4-Benzodioxane | C8H8O2 – PubChem