Polyphenylene ether resin composition, and a prepreg and a copper clad laminate made therefrom

A polyphenylene ether resin composition comprising:

• (A) functionalized polyphenylene ether resin, (B) crosslinking agent and (C) initiator, wherein component (A) is a polyphenylene ether resin with a number average molecular weight of 1200-2200 and unsaturated double bonds at the molecule terminal, component (B) is an olefin resin with a number average molecular weight of 4500-5300, styrene structure comprising 10-50 wt % of the olefin resin, the molecule of the olefin resin comprising a 1,2-addition butadiene structure, the structural formula of component (A) is as shown in the following formula (1):
• wherein a and b respectively represent an integer of 1-30 and Z represents a structure defined by formula (2):
• -(—O—Y—)- in the formula (1) is a structure defined by the formula (4);
• wherein each of R4 and R6 are CH3, each of R5 and R7 are H, -(—O—X—O—)- in formula (1) is a structure defined by formula (5):
• wherein each of R8, R9, R10, R12, R13, and R15 are CH3, each of R11 and R14 are H, and B represents a bond;
• wherein the usage amount of the component (A) functionalized polyphenylene ether resin comprises 20-90 wt % of the total amount of the component (A) and component (B), and the usage amount of the component (B) crosslinking agent comprises 10-80 wt % of the total amount of the component (A) and component (B);
• the content of 1,2-addition butadienyl in the molecule of the olefin resin of the component (B) is not less than 30 wt %;
• taking the total amount of the component (A) and component (B) as 100 parts by weight, the usage amount of the component (C) initiator is 1-5 parts by weight;
• and
• wherein the half-life temperature t1/2 of the initiator is not less than 130° C.;
• the initiator is a radical initiator, which is one or more selected from the group consisting of dicumyl peroxide, tert butylperoxy benzoate, 2,5-bis(2-ethylhexanoylperoxy)-2,5-dimethylhexane, di(tert-butylperoxyisopropyl)benzene, bis 2,4-dichlorobenzoyl peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, tert-butylperoxy 2-ethylhexyl carbonate, 2,5-di(tert-butylperoxy)-2,5-dimethyl-3-hexyne, butyl 4,4-bis(tert-butyldioxy)valerate, 1,1-di-(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 3,3,5,7,7-pentamethyl-1,2,4-trioxygen heterocycle methyl heptane, di-t-butyl peroxide, and tert-butyl cumyl peroxide;
• wherein the composition has a Tg of 220-240° C. and Df at 10 GHz of 0.0035-0.004.