| 摘要 |
A process for preparing a prepreg that comprises reacting a polycyclic polyene comprising dicyclopentadiene with a cyclic polysiloxane having three or more hydrogen atoms bound to silicon, and the polyene and the polysiloxane are reacted with a chain extender comprising at least one polyene having at least two non-aromatic, non-conjugated carbon-carbon double bonds highly reactive in hydrosilation to produce a prepolymer comprising a polycyclic polyene residue and a cyclic polysiloxane residue linked through carbon-silicon bonds, and the reaction is continued until the prepolymer has a viscosity of 300 to 3,000 centipoise at 100 DEG C and has 65% to about 75% of the available IDENTICAL SiH groups of the cyclic polysiloxane reacted, impregnating a fiber reinforcing material with the prepolymer, and heating the impregnated material to cure the prepolymer. |
