Solvothermal Polymerization of Diaminomaleonitrile Reveals Optimal Green Solvents for the Production of C=N-Based Polymers.

Solvothermal polymerization (STP) of diaminomaleonitrile (DAMN) was evaluated using a wide variety of solvents and in the temperature range from 80 to 170 °C. The highest yields, almost quantitative, were achieved with protic -alcohols such as -pentanol or -hexanol at 130 and 150 °C, respectively. The kinetic behavior was studied by gravimetry and the DAMN consumption was monitored by UV-vis spectroscopy and HPLC.