| 摘要 |
A method for producing a composite material, including an assembly of one or a plurality of synthetic reinforcement fibres, impregnated with at least one thermoplastic polymer having a vitreous transition temperature Tg greater than or equal to 80° C. including: i) a step of impregnating said assembly with a precursor composition in the molten state and including: a) at least one prepolymer P(X)n of said thermoplastic polymer, including a molecular chain P having, at the ends n thereof, identical reactive functions X, said prepolymer having a semi-aromatic and/or semi-cycloaliphatic structure, b) at least one chain extender including two identical functions Y, which are reactive with at least one of said functions X; ii) a step of polymerisation by mass (poly)addition, in the molten state, of said prepolymer with said chain extender, with said thermoplastic polymer of the thermoplastic matrix being the result of said polymerisation by mass polyaddition. |
| 主权项 |
1. A process for the manufacture of a composite material, the composite material comprising an assemblage of one or more synthetic reinforcing fibers, which is impregnated with at least one thermoplastic polymer having a glass transition temperature Tg of greater than or equal to 80° C., said process comprising:
i) a stage of impregnation of said assemblage with a precursor composition in the molten state (after melting), the impregnation being carried out at a temperature such that the viscosity of said precursor composition in the molten state does not exceed 100 Pa·s, with said precursor composition comprising:
a) at least one prepolymer P(X)n of said thermoplastic polymer, comprising a molecular chain P having, at its ends, n identical reactive functional groups X, said prepolymer being of semiaromatic and/or semicycloaliphatic structure, with X being a reactive functional group from: OH, NH2 or COOH, with n ranging from 1 to 3,b) at least one chain extender, which can be represented by Y-A-Y, comprising two identical Y functional groups which react with at least one of said X functional groups, ii) a stage of bulk polymerization by (poly)addition in the molten state of said prepolymer with said chain extender,with said thermoplastic polymer being the result of said bulk polymerization by polyaddition. |
