Prepreg and uses thereof

A prepreg, which comprises a liquid crystal polymer fiber woven fabric impregnated with or coated with a thermally curable resin composition, wherein the thermally curable resin composition comprises:

• (A) a polyphenylene ether resin having an unsaturated functional group;
• (B) a polyfunctional vinyl aromatic copolymer;
• (C) a compound having the structure of formula (I);
• an elastomer;
• and
• a filler,
• wherein, in formula (I), X is a C1-C10 linear or branched alkylene;
• and
• the polyfunctional vinyl aromatic copolymer (B) is prepared by copolymerizing one or more divinyl aromatic compounds with one or more monovinyl aromatic compounds,
• wherein the polyphenylene ether resin (A) having an unsaturated functional group comprises a polyphenylene ether resin represented by the formula (II):
• wherein, in formula (II),
• R4, R5, R6 and R7 are independently H or a substituted or unsubstituted C1-C5 alkyl;
• p and q are independently an integer from 0 to 100, with the proviso that p and q are not 0 at the same time, and 20≤(p+q)≤25;
• Y4 and Y5 are independently a direct bond, a carbonyl group, or an alkenyl-containing group;
• A1 and A2 are independently
• and
• W is a direct bond, —O—,
• or an aryl, wherein R8 and R9 are independently H or a C1-C12 alkyl.