Disclosed is a concise, inexpensive and scalable method for preparing elastomers filled with conductive 2D nanoparticies. The method comprises independently filling elastomer polymer precursors and/or corresponding elastomer polymer curing agents or their precursors with conductive 2D nanoparticles by shear exfoliation of a layered material, followed by mixing the two components nd curing to form the elastomer. Such filled elastomers have utility in preparing various types of sensors which are useful in a variety of practical applications and devices.

To provide a method for producing lanthanum hexaboride-containing composite particles which are capable of forming a formed product having sufficiently high transparency and which are excellent in weather resistance, by a simple operation without calcination treatment at high temperature, and a method for producing a formed product using it. Also provided is a method for producing composite particles, which involves: reacting at least one silica precursor selected from a tetraalkoxysilane, its hydrolysate and its condensate, in the presence of lanthanum hexaboride particles, a volatile base, water and an organic solvent to obtain a first reaction mixture, and reacting the first reaction mixture with at least one silicon compound selected from an amino-modified silicone, an alkylsilane and an aminosilane, or the silicon compound and the silica precursor added, to obtain a second reaction mixture containing lanthanum hexaboride-containing composite particles.

Polymer compositions comprising high structure filler materials and methods for preparing such compositions while retaining structure.

Provided are a polymer film including a particle A having a constricted structure and a polymer B; a laminate including the polymer film and a metal layer or metal wire disposed on at least one surface of the polymer film; and a method of producing the polymer film.

Disclosed herein is a polyamide composition (PC) including at least one polyamide (A) and at least one carbon black (B), where the surface layer of the at least one carbon black (B) includes not more than 2% by weight of oxygen, based on the total weight of the surface layer of the at least one carbon black (B), and where the weight of oxygen in the surface layer is measured by X-ray photoelectron spectroscopy at an X-ray penetration depth of 2 to 10 nm. Further disclosed herein are a process for producing the polyamide composition (PC), a process for producing a moulded article by forming the polyamide composition (PC), a moulded article including the polyamide composition (PC), and a method of using the at least one carbon black (B) in a polyamide composition (PC) for increasing the shrinkage of moulded articles made from the polyamide composition (PC).

The present disclosure addresses the problem of providing an optical plastic film such that rainbow unevenness when viewed with naked eyes and blackout when viewed with polarized sunglasses can be suppressed without any axis alignment or increase in the in-plane phase difference. Disclosed is an optical plastic film satisfying the following conditions 1 and 2: <Condition 1> when a large sample with a size of 200 mm×300 mm is cut out from a plastic film, the large sample is divided into 30 small samples of 40 mm×50 mm, a region of 30 mm×40 mm obtained by excluding 5 mm from each edge of each small sample is subdivided into 47,000 or more regions, and an in-plane phase difference of each subdivided region is then measured, a percentage of small samples in which an average of the in-plane phase difference of each region measured is 50 nm or more and 1,200 nm or less, among the 30 small samples is 50% or more; and <Condition 2> when the 30 small samples are processed in the same manner as in condition 1 and an angle of slow axis of each subdivided region of each small sample is measured, a percentage of small samples in which a standard deviation a calculated from the angle of slow axis of each region measured is 0.8 degrees or more, among the 30 small samples is 50% or more.

This invention relates to a high molecular weight nylon powder composition for 3D printing, its preparation method and use. The composition comprises: 100 parts by weight of high-viscosity nylon powder, 1-5 parts by weight of a flow agent, and 0.1-1 parts by weight of an antioxidant; the high-viscosity nylon powder is one or more selected from nylon 6, nylon 66, nylon 11, nylon 12, nylon 612 and nylon 610; or the powder composition is obtained via polymerization reaction of the raw materials comprising the following components, based on the weight parts of lactam monomers or amide monomers: 100 parts by weight of lactam monomers or amide monomers, 0.005-1 parts by weight of a catalyst, and 0.1-1 parts by weight of an antioxidant. The high molecular weight nylon powder composition prepared in the present invention has a particle diameter in the range of 20-100 micrometers, good powder spreading performance, and is suitable for the 3D printing process, and the product of the high molecular weight nylon powder composition has good mechanical properties, good dimensional stability and low manufacturing cost.

Disclosed are embodiments of polymer compositions and systems that contain antimicrobial and wavelength-shifting metal nanoparticles. The polymer compositions containing metal nanoparticles protect exposed materials from UV radiation. The polymer compositions containing metal nanoparticles down convert incoming UV light to light that may have a longer wavelength. Unexpectedly, by selecting at least two differently configured nanoparticle components (e.g., different in size, shape, or both), each with specific particle size distribution, it is possible to effectively protect an area from damage resulting from exposure to UV radiation. In addition, spherical silver nanoparticles do not cause bacteria to become resistant as do convention silver nanoparticles made by chemical synthesis.

Provided is a heat-dissipating elastic body composition. The heat-dissipating elastic body composition according to an exemplary embodiment of the present invention includes an elastic matrix-forming component including a base resin and a vulcanizing agent, and a heat-dissipating filler. Accordingly, the heat-dissipating elastic body may protect a heating element from a physical stimulus such as a vibration or impact transmitted from the outside to a heat dissipater, and rapidly transduce and radiate heat generated in the heating element. In addition, the heat-dissipating elastic body may minimize vibrations caused by a physical stimulus applied from the outside and a noise thereby by minimizing a gap between a heating element and an exterior material, a heat dissipating element or the like, which is adjacent thereto/in close contact therewith. Further, the heat-dissipating elastic body heating element may minimize deterioration by heat generated by a heating element or an external chemical stimulus and may be easily implemented in various shapes, and therefore, it may be widely applied to all industries requiring heat dissipation.

A method of producing a heat-resistant chlorine-containing crosslinked resin formed body, formed from: Step (a) of melt-mixing, to a base resin containing a chlorinated polyethylene and a polyvinyl chloride and a plasticizer, an organic peroxide, an inorganic filler, and a silane coupling agent, at a specific ratio, at a temperature equal to or higher than a decomposition temperature of the organic peroxide; Step (b) of mixing a silane masterbatch obtained in Step (a) and a silanol condensation catalyst; and Step (c) of crosslinking by bringing a formed body obtained by Step (b) into contact with water; wherein, in Step (a), from 5 to 55 mass % of the plasticizer is contained in 100 mass % of the base resin to be used in the reaction with the silane coupling agent; the formed body produced therefrom; a silane masterbatch and a mixture thereof; and a heat resistant product.