Abstract
AbstractPolyacetylenes with good performance in O2/N2 separation were reported. A series of cis‐helical poly(trialkylsilylethynylphenylacetylene)s (PSEPAs) with average molecular weight in the range of 105–106 g mol−1 are synthesized under the catalysis of [Rh(nbd)Cl]2. The free‐standing membranes are prepared from the solution of PSEPAs in chloroform. A rigid PSEPA membrane exhibits the tensile strength of 22.2 MPa, while a flexible PSEPA membrane shows an elongation at break of 44.2% at room temperature. Moreover, the rigid PSEPA membrane shows ultra‐high oxygen permeability of 3.09 × 105 Barrer. The results show that PSEPAs are potential polymers for the applications in O2/N2 separation field.
Published Version
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