A new approach to determining homopolymer domain sizes in polycarbonate-polyether dialysis membranes by solid-state NMR.
The size of micro-separated domains of polyether (PEO), -[CH2CH2O]n-, and polycarbonate (PC), -[(C6H4)-C(CH3)2-(C6H4)-OCO2]m-, in the dialysis membrane 'Gambrane' have been determined using an advanced solid-state NMR technique which exploits differences in 1H spin diffusion. The characteristic diameter of a PEO domain is 4.8 +/- 1.4 nm and that of PC is 5.2 +/- 1.4 nm with a mixed phase region of 0.8 +/- 0.5 nm.
Lewis
R H
RH
Max-Planck-Institut für Polymerforschung, Mainz, Germany.
Wiesner
U
U
Lehmann
S
S
Spiess
H W
HW
D003956:Dialysis / Q000295:instrumentation; D009682:Magnetic Resonance Spectroscopy; D008422:Materials Testing; D008567:Membranes, Artificial; D011076:Polycarboxylate Cement / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties
D008567:Membranes, Artificial; D011076:Polycarboxylate Cement; D011108:Polymers; C005506:polycarbonate; C049723:polycarbonate-polyether copolymer; D011092:Polyethylene Glycols