Cd(NO3)2. 4H2O and (Ph3P)2PdCl2 catalysts respectively. The behaviours of copolymerization of pheny-lacetylene (PA) and butynediol (BD) were investigated by (Ph3P)2PdCl2 catalyst. When PA/ BD≥1 (mole ratio)
the copolymers are soluble and fusible. When PA/BD=1
the copolymers obtained can be separated into two coponents
one is soluble and fusible
another insoluble and infusible. When PA/BD≤1
the copolymers are insoluble and infusible. According to IR spectra of homopolymers and copolymers