Under an argon atmosphere, a solution of the PCP monomer (500 mg, 1.00 equiv.) and AIBN (up to 0.10 equiv.) in dry, degassed toluene was stirred for 24 h at 60 °C. The product was precipitated with a tenfold excess of methanol. Subsequently, the polymer was solved in toluene and precipitated with methanol to yield a white solid Polymerization of diazo compounds: