Hydrodynamic properties of poly(1-trimethylsilyl-1-propyne) molecules in solutions

A new organosilicon polymer poly(1-trimethylsilyl-1-propyne) was synthesize d from disubstituted polyacetylene with the use of the catalytic system TaC l5/BuLi. Hydrodynamic properties of samples and fractions of the polymer in solutions were studied over a 70-fold range of molecular weight by forward diffusion, high-speed sedimentation, viscometry, and gel-permeation chroma tography. The temperature dependence of the intrinsic vicsosity in various solvents were studied. Possible structural factors affecting the conformati on of poly(1-trimethylsilyl-1-propyne) molecules are considered.