Abstract:
A method is provided for making a crosslinked polymer electrolyte, typically in the form of a membrane for use as a polymer electrolyte membrane in an electrolytic cell such as a fuel cell, by trimerization of nitrile groups contained on groups pendant from the polymer. The resulting polymer electrolyte membrane comprises a highly fluorinated polymer comprising: a perfluorinated backbone, first pendent groups which comprise sulfonic acid groups, and crosslinks comprising trivalent groups according to the formula I The first pendent groups are typically according to the formula: -R 1 -SO 3 H, where R 1 is a branched or unbranched perfluoroalkyl or perfluoroether group comprising 1-15 carbon atoms and 0-4 oxygen atoms, most typically -O-CF 2 -CF 2 -CF 2 -CF 2 -SO 3 H or O-CF 2 -CF(CF 3 )-O-CF 2 -CF 2 SO 3 H.
Abstract translation:提供了一种制备交联聚合物电解质的方法,通常是通过聚合物悬浮在基团上的腈基的三聚作用将聚合物电解质通常用作电解池如燃料电池中的聚合物电解质膜。 所得的聚合物电解质膜包括高度氟化的聚合物,其包含:全氟化骨架,包含磺酸基团的第一侧基和包含根据式I的三价基团的交联。第一侧基通常根据下式:-R 1 > -SO 3 H,其中R 1是包含1-15个碳原子和0-4个氧原子的支链或非支链全氟烷基或全氟醚基团,最典型的是-O-CF2-CF2-CF2-CF2-SO3H或O-CF2- CF(CF 3)-O-CF 2 -CF 2 SO 3 H.
Abstract:
A method of making a crosslinked polymer is provided as well as the polymer so made, the method comprising the steps of: providing a highly fluorinated fluoropolymer, typically a perfluorinated fluoropolymer, comprising pendent groups which include a group according to the formula -S0 2 X, where X is F, Cl, Br, OH, or O - M + , where M + is a monovalent cation, and exposing said fluoropolymer to electron beam radiation so as to result in the formation of crosslinks. Typically, the method according to the present invention additionally comprises the step of: forming said fluoropolymer into a membrane, typically having a thickness of 90 microns or less, more typically 60 microns or less, and most typically 30 microns or less.
Abstract translation:提供制备交联聚合物的方法以及如此制备的聚合物,该方法包括以下步骤:提供高度氟化的含氟聚合物,通常为全氟化含氟聚合物,其包含侧基,其包括根据式-SO 2 X的基团,其中 X是F,Cl,Br,OH或O + M +,其中M +是单价阳离子,并将所述含氟聚合物暴露于电子束辐射,从而导致形成交联。 通常,根据本发明的方法另外包括以下步骤:将所述含氟聚合物形成膜,通常具有90微米或更小,更典型地为60微米或更小,最通常为30微米或更小的厚度。
Abstract:
A fluoropolymer is modified by contacting it with a modifying composition preparable from components comprising a phase transfer catalyst and at least one of a sulfide or disulfide salt, and heating the modifying composition. The modified fluoropolymer is useful in the preparation of composite articles.
Abstract:
The present invention provides immune response modifiers (IRMs) on particulate support materials that includes one or more metals, including alloys or complexes thereof.
Abstract:
The present invention provides immune response modifiers (IRMs) associated with (typically, attached to, and preferably, covalently attached to) macromolecular support materials. The IRM compounds in such IRM-support complexes retain biological activity. Such attachment of an IRM to a macromolecular support material provides for the localized biological activity of the IRM.
Abstract:
Disclosed are various fluoropolymer blend combinations and multilayer articles comprising a blend in a first layer and a second layer comprising a polymer bonded to the first layer. The invention also provides an article comprising a first layer comprising a blend of two or more fluoropolymers, and a second layer bonded to the first layer, the second layer comprising a partially-fluorinated thermoplastic polymer, a perfluorinated thermoplastic polymer, or a combination thereof. The invention also provides an article comprising a first layer comprising a blend of two or more fluoropolymers, at least one of which comprises a partially-fluorinated thermoplastic polymer, and optionally at least one perhalogenated polymer, and a second layer bonded to the first layer, the second layer comprising an at least partially-fluorinated thermoplastic polymer. The invention also provides processes for preparing blended fluoropolymers and multilayer articles comprising a fluoropolymer layer.
Abstract:
The invention provides an article comprising a first layer comprising a first substantially solid partially-fluorinated thermoplastic polymer, and a second layer comprising a second substantially solid partially-fluorinated thermoplastic polymer, the second layer bonded to the first layer, wherein the first polymer and the second polymer have different compositions. The invention also provides layered articles and processes for preparing layered articles.
Abstract:
This invention concerns a process for modifying a polymeric substrate by contacting the surface with a photoreactive solution of an inorganic photochemical electron donor while irradiating the surface with actinic radiation. Patterns of modified and unmodified surfaces can be produced. Polymeric substrates with modified surfaces may be effectively bonded to polymer films to form composite articles. The process has particular applicability to the surface modification of fluorinated polymers.