Table 2.

Inherent viscosities, molar mass and solubility of CPI resins.

PI	[η]inh a (dL/g)	Molar Mass b			Solubility c
		Mn (×104 g/mol)	Mw (×104 g/mol)	PDI	NMP	DMAc	GBL	CPA	THF
CPI-Ia	0.68	8.58	12.92	1.51	++	++	++	+	+
CPI-IIa	0.83	11.41	17.95	1.57	++	++	++	+	+
CPI-Ib	0.51	5.04	8.20	1.63	++	++	++	+	+
CPI-IIb	0.62	7.09	11.71	1.65	++	++	++	+	+
CPI-ref1	1.03	13.77	20.90	1.52	++	++	++	++	+
CPI-ref2	0.96	9.74	15.76	1.62	++	++	++	++	+

^a Inherent viscosities measured with a 0.5 g/dL PI solution in NMP at 25 °C. ^b M_n: number average molar mass. M_w: weight average molar mass. PDI: dispersity index, PDI = M_w/M_n. ^c ++: Soluble. +: partially soluble. insoluble. GBL: γ-butyrolactone. CPA: cyclopentanone. THF: tetrahydrofuran.