Reversible crosslinking reactant composition

A reversible crosslinking reactant composition, comprising:

• at least one furan-group-containing oligomer having a structure represented by Formula (I) and;
• a bismaleimide compound having a structure represented by Formula (II):
• wherein the equivalent ratio of the furan group of the furan-group-containing oligomer having a structure represented by Formula (I) to the maleimide group of the bismaleimide compound having a structure represented by Formula (II) is from 0.5:1 to 1:0.5,
• wherein x is an integer of 1 to 5, A is
• in which the repeating unit
• and the repeating unit
• are arranged in order or random, wherein the location represented by * is connected to G, m is an integer of 7 to 200, n is an integer of 7 to 200, G is a bonding, —O—, —NH—, —Ar—NH—(CH2)b—, —Ar—O—(CH2)b—, —Ar—O—(CH2)a—NH—(CH2)b—, —(CH2)a—NH—(CH2)b—, —(CH2)a—O—(CH2)b—, or —(CH2)a—CH(OH)—(CH2)b—NH—, Ar is substituted or unsubstituted arylene group, a is an integer of 1 to 5, b is an integer of 0 to 5, and the furan-group-containing oligomer having a structure represented by Formula (I) has a number average molecular weight of 1000 to 12000,
• wherein E is substituted or unsubstituted C6-C25 arylene group, C7-C25 alkyl aryl group, C7-C25 arylalkyl group, C6-C25 heteroarylene group, C7-C25 acylaryl group, C7-C25 alkoxyaryl group, C7-C25 acyloxyaryl group, C6-C25 arylene ether group, or C6-C25 arylene ether group.