There is provided an assembly for handling, transporting storing hydrogen, wherein the assembly comprises a component comprising a polymeric material (A) having a repeat unit of formula (I): OPhOPhCOPh(I) wherein Ph represents a phenylene moiety, and wherein the polymeric material (A) has a melt viscosity of at least 0.38 kNsm.sup.2. Also provided are a use of the polymeric material (A) in a component of an assembly for handling, transporting or storing hydrogen and a method of handling, transporting or storing hydrogen.

The storage unit comprises an internal reservoir, an external reservoir, and a suspension suspending the internal reservoir from the external reservoir; The suspension comprises a link that includes a cuff made of a composite material with a central axis, a proximal link of a proximal axial end of the cuff to the internal reservoir; and a distal link of a distal axial end of the cuff to the external reservoir. The proximal link comprises a body closing the proximal axial end of the cuff, the body having an external surface defining an external tapered bearing surface coaxial with the central axis and engaged inside the proximal axial end. The proximal link further comprises a ring connected to the internal reservoir, the ring having an internal surface defining an internal tapered bearing surface coaxial with the central axis and surrounding the proximal axial end, the proximal axial end of the cuff is clamped between the external tapered bearing surface and the internal tapered bearing surface.

A thermosetting resin composition containing a component (A) that is an epoxy resin, a component (B) that is a (meth)acrylate compound, a component (C) that is an epoxy resin curing agent, and a component (D) that is a thermal radical polymerization initiator, wherein the component (B) contains a component (B1) that is a poly(butadiene-CO-acrylonitrile) having an acryloyloxy group each at both termini and a component (B2) that is a polyfunctional (meth)acrylate other than the component (B1), and the component (C) contains a boron amine complex; a cured product of the thermosetting resin composition; a prepreg; a fiber-reinforced composite material; and a high-pressure gas container containing the fiber-reinforced composite material.