Kada Zhang. Poly(1 -(trimethylsilyl)1 -propyne)-A Promising Materials for Gas Separation[J]. Polymer Bulletin, 1993,6(3):165-169,186. DOI: 10.14028/j.cnki.1003-3726.1993.03.007.
Permeabilities of poly [1-(trimethylsilyl) 1- propyne] (PTMSP) to gases is higher than those of any other nonporous synthetic polymers whether they are glassy or rubbery at ambient temperature. PTMSP is in the glassy polymer state. The high gas permeability of PMSP results primary from substantial gas solubility and diffusivity
which appears to be due to
in turn
to a large excess free volume in the unrelaxed (Iangmuir) domains of this glassy polymer. The biggest problem with PMSP is the deterioration of its high permeability with the passage of time or thermal histeresis. Now
a lot of efforts is being devoted to solving this problem by the addition of less volatile materials