Heat and Solvent Resistant Electrospun Polybenzoxazole Nanofibers from Methoxy-Containing Polyaramide

Table 3

Solubility behavior of MeO-PA and PBO nanomats.

Sample	DMAc	DMF	CSA	DMSO	MSA	Ethyl ether	Chloroform	NMP
MeO-PA	+−	+−	++	+h	++	− −	− −	+h
PBO	− −	− −	++	− −	++	− −	− −	− −

++: soluble at room temperature; +h: soluble on heating; +−: soluble by adding LiCl; − −: insoluble; CSA: concentrated sulfuric acid; MSA: methyanesulfonic acid.