Abstract: A membrane for a proton exchange membrane fuel cell including, by weight with respect to the total weight of the membrane: from 50 to 95% of polymer A; and from 5 to 50% by weight of polymer B; A being a cation exchange fluorinated polymer; and B being a hydrocarbon aromatic polymer different from polymer A, and comprising at least one aromatic ring on its polymer chain.

Abstract: The invention relates to an electronic component (1) comprising at least one semiconductor chip (4) and at least one substrate (6), the semiconductor chip (4) being encapsulated in a polyorganosiloxane resin (3), which is the result of hardening a composition comprising at least: one portion (A) comprising at least one polyorganosiloxane (A1) which contains at least two —CH?CH2 reactive groups per molecule; one portion (B) comprising a polyorganosiloxane (B1) which comprises at least two Si—H groups per molecule; and at least one hydrosilation catalyst (C1), the components (A1) and (B1) being in quantities such that the molar ratio of Si—H/—CH?CH2 in the composition is no lower than 0.4.

Abstract: The invention relates to an electronic component (1) comprising at least one semiconductor chip (4) and at least one substrate (6), the semiconductor chip (4) being encapsultated in a polyorganosiloxine resin (3), which is the result of hardening a composition comprising at least: one portion (A) comprising at least one polyorganosiloxane (A1) which contains at least two —CH?CH2 reactive groups per molecule; one portion (B) comprising polyorganosiloxane (B1) which comprises at least two Si—H groups per molecule; and at least one hydrosylation catalyst (C1), the component (A1) and (B1) being in quantities such that the molar ratio of Si—H/—CH?CH2 in the composition is no lower than 0.4.

Abstract: In order to carry out the encapsulation of electronic components, the invention proposes to cover the electronic components (7) with a heat-polymerisable material corresponding to a composition comprising a diimide constituent and a diamine constituent, in which the diimide constituent has been predissolved in the diamine constituent, and to heat the assembly obtained under conditions suitable for carrying out the curing of the material by an addition polymerization reaction between said diimide constituent and the diamine constituent. The invention finds an application in particular in the field of electronic power modules.

Abstract: In order to carry out the encapsulation of electronic components, the invention proposes to cover the electronic components (7) with a heat-polymerisable material corresponding to a composition comprising a diimide constituent and a diamine constituent, in which the diimide constituent has been predissolved in the diamine constituent, and to heat the assembly obtained under conditions suitable for carrying out the curing of the material by an addition polymerisation reaction between said diimide constituent and the diamine constituent. The invention finds an application in particular in the field of electronic power modules.

Abstract: A membrane for a proton exchange membrane fuel cell including, by weight with respect to the total weight of the membrane: from 50 to 95% of polymer A; and from 5 to 50% by weight of polymer B; A being a cation exchange fluorinated polymer; and B being a hydrocarbon aromatic polymer different from polymer A, and comprising at least one aromatic ring on its polymer chain.

Abstract: Interpenetrating polymer networks comprising a first network of polymer A formed from monomers, at least one of which contains an aromatic group functionalized with a cation-exchange group, and a second network of polymer B formed from monomers, at least one of which contains a fluorinated group (RF). Use of these interpenetrating polymer networks for manufacturing fuel cell membranes.

Abstract: Interpenetrating polymer networks comprising a first network of polymer A formed from monomers, at least one of which contains an aromatic group functionalized with a cation-exchange group, and a second network of polymer B formed from monomers, at least one of which contains a fluorinated group (RF). Use of these interpenetrating polymer networks for manufacturing fuel cell membranes.