摘要:
Methods are provided of making chemically crosslinked block copolymer gels and chemically crosslinked block copolymer gels. The methods include swelling an olefinic block copolymer having a functionalized soft block region and a functionalized hard block region, in a softener oil, and chemically crosslinking the olefinic block copolymer. Compositions are provided comprising a chemically crosslinked olefinic block copolymer having a functionalized hard block region and a functionalized soft block region and a softener oil.
摘要:
The invention concerns a process for the preparation of nanofilms of conductive polymers, through the formation of support layers of other polymers. The present process has advantageous properties such as cost-effectiveness, speed of execution and use of relatively simple instruments; and it also allows to obtain free-standing nanofilms, i.e. nanofilms that are stable and able to support themselves without the need for any support. The present nanofilms al so have further advantageous characteristics, such as strength, flexibility, ability to adhere to different substrates, and high biocompatibility, which make them suitable for numerous different technological applications, in particular in the biomedical field.
摘要:
Polymeric sheets having interconnected microporous networks are generated by contacting the sheets with a composition including solvent and non-solvent in an appropriate ratio and removing the composition from the sheet. Such sheets may be advantageously used in microfluidic devices for a variety of purposes.
摘要:
The invention relates to a method of forming a pattern on the surface made of a hydrophobic macromolecular material of a substrate. The method of the invention also comprises a step a) of immersing at least said surface of the substrate in a solution that comprises at least 50% by volume of water and, optionally, one or more polar solvents having a dielectric constant greater than 30 and contains less than 0.0001 mol/L of dissolved gases and an ion source. The invention is particularly applicable in the electronics field.
摘要:
The invention relates to the functionalization of polymer surfaces, which is caused by a mechanical incorporation of functionalized and/or polymer-protected solid particles. A stable, homogeneous and dense functionalization of the substrate can be achieved by means of a mechanical effect on a polymer substrate wetted with functionalized solid particles. A simplification of the functionalization procedure is achieved by applying the described method.
摘要:
A novel method to develop highly conductive functional materials which can effectively shield various electromagnetic effects (EMEs) and harmful radiations. Metallized nanotube polymer composites (MNPC) are composed of a lightweight polymer matrix, superstrong nanotubes (NT), and functional nanoparticle inclusions. MNPC is prepared by supercritical fluid infusion of various metal precursors (Au, Pt, Fe, and Ni salts), incorporated simultaneously or sequentially, into a solid NT-polymer composite followed by thermal reduction. The infused metal precursor tends to diffuse toward the nanotube surface preferentially as well as the surfaces of the NT-polymer matrix, and is reduced to form nanometer-scale metal particles or metal coatings. The conductivity of the MNPC increases with the metallization, which provides better shielding capabilities against various EMEs and radiations by reflecting and absorbing EM waves more efficiently. Furthermore, the supercritical fluid infusion process aids to improve the toughness of the composite films significantly regardless of the existence of metal.
摘要:
The present invention provides a process for producing a treated or modified polymer, which process comprises the steps of: (I) providing a mixture comprising a liquid, an additive and a polymer, wherein the additive is dispersed in the liquid; and (II) heating the mixture obtained in step (I) to soften the surface of the polymer so that the additive attaches to the polymer.