Morphology control of sulfonated poly(ether ketone ketone) poly(ether imide) blends and their use in proton-exchange membranes

Content Provider	Semantic Scholar
Author	Swier, Steven Shaw, Montgomery T. Weiss, Robert Allan
Copyright Year	2006
Abstract	Polymer blends based on sulfonated poly(ether ketone ketone) (SPEKK) as the proton-conducting component and poly(ether imide) (PEI) as the second component were considered for proton-exchange membranes (PEMs). The PEI was added to improve the mechanical stability and lower the water swelling in the fuel cell environment. Membranes were cast from solution using N-methyl-2-pyrrolidone (NMP) and dimethylacetamide (DMAc). The ternary, polymer/polymer/solvent, phase diagram was determined to provide guidance on how to control the morphology during solvent casting of blend membranes. For blends of SPEKK (ion-exchange capacity = 2 mequiv/g) with PEI as the minority component, the morphology consisted of dispersed particles of ∼0.5–6m. Larger particles were achieved by increasing the PEI content and/or lowering the casting temperature. High-temperature annealing after solution casting did not affect the morphology of blend membranes, due to the low mobility and compatibility of the two polymers.
Starting Page	22
Ending Page	31
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1016/j.memsci.2005.06.037
Volume Number	270
Alternate Webpage(s)	https://www.uakron.edu/cpspe/documents/weisspublications/swierSPEKKandPEIJMembSci2006.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article