Table 2. Solubility of the Copolymers

Polymer code		Solventa
		DMAc	NMP	DMF	DMSO	Pyridine	THF	TFA	H2SO4
PHA	IPHA-1	○(L)	○(L)	○(L)	○(L)	△	×	△	○
	JPHA-1	○	○	○	○	○	△(L,H)	△(L,H)	○
	JPHA-2	○	○	○	○	○	△(L,H)	△(L,H)	○
	JPHA-3	○	○	○	○	○	△(L,H)	△(L,H)	○
	JPHA-4	○	○	○	○	○	△(L,H)	△(L,H)	○
	JPHA-5	○	○	○	○	○	△(L,H)	△(L,H)	○
PBO	IPBO-1	×	×	×	×	×	×	×	△
	JPBO-1	×	△(L,H)	×	×	×	×	×	△
	JPBO-2	×	△(L,H)	×	×	×	×	×	△
	JPBO-3	×	△(L,H)	×	×	×	×	×	△
	JPBO-4	×	△(L,H)	×	×	×	×	×	△
	JPBO-5	×	△(L,H)	×	×	×	×	×	△

○ : soluble, △ : partially soluble, × : insoluble, ○(L) : soluble with LiCl, ○(L,H) : soluble with LiCl(on heating), △(L,H) : partially soluble with LiCl (on heating)
DMAc : N,N-dimethylacetamide, NMP : N-methyl-2-pyrrolidone, DMF : N,N-dimethylformamide, DMSO : dimethylsulfoxide, THF : tetrahydrofuran, TFA : trifluoroacetic acid
solubility was tested with 10 mg sample in 1 mL solvent