Crystalline polymers of bis(β-chloroethyl) vinylphosphonate

The polymerization of bis(β-chloroethyl) vinylphosphonate to a crystalline solid was carried out with a Ziegler-Natta catalyst. A confirmation of the crystalline nature of the polymers was carried out by x-ray diffraction. The polymers would not melt even at temperatures up to 620°C., but instead began to char. However, they were soluble in dimethylformamide and acrylonitrile.