Synthesis of polyimides in supercritical carbon dioxide

Solubility of diamines in supercritical carbon dioxide

“…where v s 2 and P sub 2 are, respectively, the molar volume and sublimation pressure of the solid component (2). The fugacity coefficient φ scf 2 is calculated by means of the Peng-Robinson EOS [27,28] expressed by (Eqs.…”

“…SCF technology has a great application potential in many processes, such as in food, pharmaceutical, biochemical industries and polymer processing [1][2][3][4][5][6][7][8] and is a rapidly developing field of environment-friendly chemistry. As a reaction medium, the attractive physical and toxicological inertness properties of supercritical carbon dioxide have made it superior to conventional organic solvents.…”

“…Diamines are an important class of compounds applied in different fields of industry and particularly in the synthesis of a number of polymers [2,[9][10][11][12][13]. Therefore, knowledge of the solubility of these compounds in Sc-CO 2 and of its dependence on pressure and temperature will be of great importance in process design, particularly in the polymer synthesis in supercritical conditions, where the Sc-CO 2 can act not only as a reaction medium, but also as a catalyst for the reactions in presence of water admixtures [2].…”

“…Therefore, knowledge of the solubility of these compounds in Sc-CO 2 and of its dependence on pressure and temperature will be of great importance in process design, particularly in the polymer synthesis in supercritical conditions, where the Sc-CO 2 can act not only as a reaction medium, but also as a catalyst for the reactions in presence of water admixtures [2]. [15], and special care was taken to prepare fully anhydrous samples.…”

Achievements in polycondensation and condensation polymers

“…The amino containing copolyesters show promise for the creation of biomimetic materials, and, at certain frac tions of salt components, such copolymers feature amphiphilic behavior. Moreover, several (co)polyes ters were successively synthesized in a widely known "green" solvent, supercritical carbon dioxide СО 2 [16][17][18][19].…”