A method for modifying a cellular polymer foam with apparent porosity, which includes providing a cellular polymer foam with apparent porosity, placing the cellular polymer foam in contact with at least one compound in order to obtain a cellular polymer foam including on the surface thereof an intermediate phase formed from the compound having at least one catechol unit. The foam may be used as a catalyst substrate.

The invention relates to a process for preparing a polyurethane foam having a resilience of at least 40%. comprising reacting a polyether polyol component (a) and a polyisocyanate in the presence of a blowing agent and a foam stabiliser component (b). wherein polyether polyol component (a) comprises (a) (i) a polyether polyol which has a molecular weight lower than 4.500 g/mole and is prepared by ringopening polymerization of an alky lene oxide in the presence of an initiator having a plurality of active hydrogen atoms and a composite metal cyanide complex catalyst. and (a) (ii) a polyether polyol which has a molecular weight of 4.500 g/mole or higher and which has a primary hydroxyl content of at least 30%; and foam stabiliser component (b) comprises foam stabilisers (b) (i) and (b) (ii) which are organosilicone surfactants comprising a polysiloxane-polyoxyalkylene copolymer, wherein the weight ratio of (b) (i) to (b) (ii) is at most 0.5:1.

A physically crosslinked, closed cell continuous foam structure derived from recycled metallized polyolefin material; polypropylene, polyethylene, or combinations thereof, a crosslinking agent, and a chemical blowing agent is obtained. The foam structure is obtained by extruding a structure comprising a foam composition, irradiating the extruded structure with ionizing radiation, and continuously foaming the irradiated structure.

The present invention relates to a process for the production of a multi-layered material having anisotropic pores. It further relates to a multi-layered material which can be produced by the process according to the invention, and to the use of a multi-layered material as a chondral support matrix, a meniscus support matrix or an intervertebral disc support matrix.

A formulation includes a polymeric material, a nucleating agent, a blowing, and a surface active agent. The formulation can be used to form a container.

The present invention relates to a method for preparing a porous scaffold for tissue engineering. It is another object of the present invention to provide a porous scaffold obtainable by the method as above described, and its use for tissue engineering, cell culture and cell delivery. The method of the invention comprise the steps consisting of a) preparing an alkaline aqueous solution comprising an amount of at least one polysaccharide and one cross-linking agent b) freezing the aqueous solution of step a) c) sublimating the frozen solution of step b) characterized in that step b) is performed before the cross-linking of the polysaccharide occurs in the solution of step a).

The present invention relates to a composition of polymers comprising dynamic covalent diketoenamine bonds. This composition allows the formulation of polymeric materials with a wide range of architectures and properties, and further allows these materials to be recycled using thermal, chemical, or mechanical processes.

A structured porous metamaterial includes a three-dimensional matrix of at least one repeating base unit. The matrix is formed from an array of at least eight base units, each base unit including a platonic solid including at least one shaped void, wherein each base unit has void geometry tailored to provide a porosity of between 0.3 and 0.97, and to provide the metamaterial with a response that includes a Poisson's ratio of 0 to 0.5 when under tension and compression, or negative linear compression (NLC), negative area compression (NAC), zero linear compression (ZLC), or zero area compression (ZAC) behaviour when under pressure.

The present invention relates to a composition of polymers comprising dynamic covalent diketoenamine bonds. This composition allows the formulation of polymeric materials with a wide range of architectures and properties, and further allows these materials to be recycled using thermal, chemical, or mechanical processes

The purpose of the present invention is to provide a cyclic olefin-based polymer resin foamed sheet with which the stability of mechanical properties or thermal properties is maintained and excellent light reflection characteristics, dielectric characteristics (low relative dielectric constant, low dielectric loss tangent), and surface quality are achieved. According to the present invention, a cyclic olefin-based polymer resin foamed sheet is obtained, which is characterized by comprising a cyclic olefin homo-polymer (A), a cyclic olefin copolymer (B), or a mixture of the cyclic olefin homo-polymer (A) and the cyclic olefin copolymer (B) and having an average foam diameter of 1-20 m. Consequently, a cyclic olefin-based polymer resin foamed sheet having excellent light reflection characteristics, dielectric characteristics (low relative dielectric constant, low dielectric loss tangent), and surface quality can be obtained.