Phthalonitrile compound

A phthalonitrile resin comprising polymerized units derived from a compound of Formula 1 below:

• wherein the polymerized unit is formed by a reaction of the compound of Formula 1 with a curing agent, a reaction between compounds of Formula 1, a reaction of the compound of Formula 1 with another phthalonitrile compound, or a reaction of the compound of Formula 1 with a curing agent and another phthalonitrile compound:
• wherein, Ar1 and Ar2 are each independently an aromatic divalent radical substituted with at least one amino group or hydroxy group, L, L1 and L2 are each independently a single bond, an alkylene group, an alkylidene group, an oxygen atom, a sulfur atom or —S(═O)2—, and R1 to R10 are each independently hydrogen, an alkyl group, an alkoxy group, an aryl group or a cyano group, provided that at least two of R1 to R5 are a cyano group and at least two of R6 to R10 are a cyano group,
• wherein the aromatic divalent radical in Formula 1 is a divalent radical derived from an aromatic compound represented by at least one or Formula 3 or Formula 4 below:
• wherein, R1 to R8 of Formula 3 are each independently hydrogen, an alkyl group, an alkoxy group, an aryl group, a hydroxy group or an amino group, provided that at least two of R1 to R8 form radicals, and at least one of R1 to R8 is a hydroxy group or an amino group,
• wherein, R1 to R10 of Formula 4 are each independently hydrogen, an alkyl group, an alkoxy group, an aryl group, a hydroxy group or an amino group, provided that at least two of R1 to R10 form radicals, L is an alkylene group, an alkylidene group, an oxygen atom or a sulfur atom, and at least one of R1 to R10 is a hydroxy group or an amino group.