Soluble Polyimides Bearing Long-Chain Alkyl Groups on Their Side Chain via Polymer Reaction

Table 1

Polyimides and copolyimides containing phenolic OH groups based on HAB.

						Polyimides
Tetracarboxylic dianhydride^a		Diamine; mol%	Poly(amic acid)s; 𝜂^binh; dLg^−1	Solubility in; NMP	𝜂^binh; dLg^−1		Molecular weight^c
						Mn	Mw	Mw/Mn
Cyclohexene-DA	HAB	DDE
	20	80	0.53	Soluble	0.14	15000	29700	2.0
	50	50	0.61	Soluble	0.16	14400	31900	2.2
	100	0	0.69	Soluble	0.29	17700	39100	2.2
6FDA	HAB	DDE
	20	80	0.52	Soluble	0.58	53700	110000	2.0
	50	50	0.48	Soluble	0.48	35700	81500	2.3
	100	0	0.58	Soluble	0.65	30800	64200	2.1
DSDA	HAB	DDE
	20	80	0.84	PS^d		50400^e	132200^e	2. 6^e
	50	50	0.80	PS^d		57100^e	149100^e	2.6^e
	100	0	0.45	Soluble	0.61	73700	153400	2.1

^aEquimolar amount of tetracarboxylic dianhydride was used to the total amount of diamines. ^bMeasured at 0.5 g dL⁻¹ in NMP at 30°C. ^cDetermined by SEC in NMP containing 10 mM LiBr calibrated with a series of polystyrenes as a standard. ^dPartially soluble. ^eData of soluble parts in NMP.