An external part element or component for a timepiece or piece of jewellery made with a fibre-reinforced polymer matrix composite material, this external part element including on at least one of the faces thereof at least one cavity wherein an insert made of metallic glass is housed. A method for manufacturing such an external part element is also described.

In some aspects, the present disclosure pertains to a method of forming radiopaque crosslinked hydrogel particles comprising (a) mixing a reactive multi-arm polymer comprising a plurality of cyclic imide ester groups, a reactive multifunctional compound comprising a plurality of amino groups, and a radiocontrast agent under conditions in which a pH environment surrounding the reactive multi-arm polymer, the reactive multifunctional compound and the radiocontrast agent increases from an acidic pH to a basic pH, thereby forming a radiopaque hydrogel and (b) subjecting the hydrogel to a particle size reduction process, thereby forming the radiopaque crosslinked hydrogel particles. Other aspects of the present disclosure pertain to radiopaque crosslinked hydrogel particles formed from such methods, suspensions of such radiopaque crosslinked hydrogel particles, and medical supplies that contain such radiopaque crosslinked hydrogel particles.

Provided herein is a method of preparing a crosslinked granular hydrogel, the method includes mixing a hydrogel microparticle having a first crosslinking group, a polymeric fiber having a second crosslinking group, an initiator, and a crosslinker to form a precursor composition. The method also includes applying focused ultrasound (FUS) to the precursor composition, whereby each of the first crosslinking group and the second crosslinking group reacts with the crosslinker, thereby the hydrogel microparticle and the polymeric fiber are crosslinked to form the granular hydrogel.

A composition comprising a) 3 to 20 parts by weight particles comprising aramid copolymer including an imidazole group, and b) 80 to 97 parts by weight of polyether ether ketone polymer; based on the total weight of a) and b) in the composition, and a process for making same, wherein the particles have either a particle size that will pass through a mesh screen having square openings, wherein each side of the square opening is nominally 354 micrometers, but the particles are retained on a square mesh screen wherein each side of the square opening is nominally 125 micrometers; or a particle size that will pass through a mesh screen having square openings, wherein each side of the square opening is nominally 125 micrometers. The composition is suitable for use in additive printing and manufacturing.

In some aspects, the present disclosure provides a radiopaque, reactive polymer comprising one or more hydrophilic polymer regions, the one or more hydrophilic polymer regions having first and second ends and comprising at least one hydrophilic polymer segment, a plurality of iodinated amino-acid residues, wherein at least one of the plurality of iodinated amino-acid residues is linked to each of the hydrophilic polymer regions, and a plurality of reactive moieties, wherein at least one of the plurality of reactive moieties is linked to each of the plurality of iodinated amino-acid residues and wherein the reactive moieties each comprise an electrophilic group. In other aspects the present disclosure pertains to systems that comprise such a radiopaque, reactive polymer and a compound having a plurality of nucleophilic moieties that reacts with the radiopaque, reactive polymer to form a crosslinked reaction product, as well as methods of treatment using the same.

The invention relates to: a rotor for an electric motor, wherein the rotor comprises a rotor core and a rotor sleeve which circumferentially encloses the rotor core, wherein the rotor core comprises one or more magnets, wherein the rotor sleeve comprises a plastic and fibres, wherein the fibres have a tensile strength greater than or equal to 4440 MPa. The invention also relates to: a stator for an electric motor comprising a gap pipe, wherein the gap pipe comprises a plastic and fibres, wherein the fibres have a tensile strength greater than or equal to 4440 MPa and dry fibre tensile modulus in the range of 200 to 450 GPa. The rotor and stator may be used in an electric motor assembly, preferably for a vehicle. The use of a gap pipe and/or a rotor sleeve according to the invention can reduce the air gap. This results in an improvement to the overall motor efficiency and performance.

In a method for producing a low-molecular-weight fluorine compound by decomposing a fluororesin by bringing a heated microwave absorber into contact with a material containing a fluororesin in a reaction vessel provided with a carrier gas inlet and a decomposition gas outlet, (i) a temperature difference Delta 1(TRTI), obtained by subtracting the carrier gas temperature TI ( C.) from the temperature TR ( C.) of the heated microwave absorber, is set to be more than 500 C. and/or (ii) a temperature difference Delta 2(TRTE), obtained by subtracting the product gas temperature TE ( C.) at the outlet from the temperature TR ( C.), is set to be 300 C. or higher.

The techniques described herein relate to hydrogen peroxide plasma surface modification. In some embodiments, a method includes providing a mixture including hydrogen peroxide vapor from a source, wherein a concentration of the hydrogen peroxide vapor in the mixture is substantially stable over time. The method further includes forming a hydrogen peroxide plasma from the mixture and exposing a material to the hydrogen peroxide plasma in a chamber.