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Table 7 d-Space values of NMP and GBL and membranes based on XRD data

From: Preparation of polyetherimide membrane from non-toxic solvents for the separation of hydrogen from methane

Sample PEI wt% d-Space (Å)
NMP-23 23 4.15
NMP-27 27 4.14
GBL-23 23 4.14
GBL-27 27 4.15