STUDIES ON THE BLOCK COPOLYMERIZATION OF BUTADIENE AND OCTOMETHYLCYCLOTETRASILOXANE Ⅱ. CHARACTERIZATION AND GAS-SELECTIVE PERMEABILITIES OF THE BLOCK COPOLYMERS
PANG Yong-xin, LIN Shang-an. STUDIES ON THE BLOCK COPOLYMERIZATION OF BUTADIENE AND OCTOMETHYLCYCLOTETRASILOXANE Ⅱ. CHARACTERIZATION AND GAS-SELECTIVE PERMEABILITIES OF THE BLOCK COPOLYMERS[J]. Acta Polymerica Sinica, 1995,(2):154-160.
PANG Yong-xin, LIN Shang-an. STUDIES ON THE BLOCK COPOLYMERIZATION OF BUTADIENE AND OCTOMETHYLCYCLOTETRASILOXANE Ⅱ. CHARACTERIZATION AND GAS-SELECTIVE PERMEABILITIES OF THE BLOCK COPOLYMERS[J]. Acta Polymerica Sinica, 1995,(2):154-160.DOI:
he block coplymers of polybutadiene and Polydimethylsiloxane
poly(Bd-b-DMS)
were critically characterized using FTIR
1H-NMR
DSC
TGA
WAXD.GPC
TEM etc. modern analytical and determing methods. Results verify that Poly(Bd-b-DMS) is block copolymers with the morpholgy of microphase separation. Studies on the membrane-forming property and gas-selective permeabilities show Poly(Bd-b-DMS) membranes properly vulcanized have good properties for oxygen enrichment. A sample containing 17.8wt % of PDMS has an oxygen permeation coeffi-cient (Po2) of 4.7×10-9cm3.cm/cm2·s·KPa and a separation coefficient (Po2/PN2)of 4.3. The dependence of permeabilities upon vulcanization time and solvents for cas-ting the membranes were investigated and the interrelation of the morphology of Poly(Bd-b-DMS) to permeabilities was also preliminarily discussed.