The Effect of Stereoregularity and Adding Irganox 1076 on the Physical Aging Behavior of Poly(1-trimetylsilyl-1-propyne).

The effect of the stereoregularity of poly(1-trimethylsilyl-1-propyne) [PTMSP] (-content from 50 to 90%) on physical aging was investigated by measurement of the gas permeability. Films from pure PTMSP as well as those with the addition of the antioxidant Irganox 1076 were exposed to the air. The permeability of pure PTMSP films increases with an increase in -stereoregularity and correlates with an increase in interchain distances (according to X-ray analysis).