Phanthuwongpakdee, Jakkapon; Harimoto, Toyohiro; Babel, Sandhya; Dwivedi, Sumant; Takada, Kenji; Kaneko, Tatsuo published the artcile< Flame retardant transparent films of thermostable biopolyimide metal hybrids>, Electric Literature of 4415-87-6, the main research area is flame retardant transparent film thermostable bio polyimide metal hybrid.
The development of flame retardant transparent films is important for elec. devices and building materials it but it is still a challenge. Herein, flame retardant films having high optical transparency were developed from the amino acid-based biopolyimide (BPI) salt with aluminum (BPI-COOAl) and copper ions (BPI-COOCu). The microscale combustion calorimetry anal. revealed that for BPI-COOAl, the total heat released (THR) and peak heat released rate were 4.5 W/g and 18.9 kJ/g, resp. These values were lower than those of its precursors and BPI-COOCu. BPI-COOAl was rated V-0 for the Underwriters Laboratories vertical burning standard test. The polymer also retained a high transparency of more than 80% transmittance at a wavelength of 450 nm. The tensile strength was also preserved at 63.7 MPa. For BPI-COOCu, 14.6 kJ/g THR and 47.1 MPa tensile strength were observed When a colorful ion such as Cu was used, BPI-COOCu became a flame retardant film that was a green filter. The char formation of Al2O3 and Cu2O in their resp. polymer complexes was deduced as the main flame suppression mechanism. The present films of biopolyimide salts are advantageous in showcasing the balance of different essential material properties such as flame retardancy, thermo-mech. stability, and transparency.
Polymer Degradation and Stability published new progress about Cation exchange. 4415-87-6 belongs to class tetrahydrofurans, and the molecular formula is C8H4O6, Electric Literature of 4415-87-6.
Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem