In a method for producing a high-molecular-weight polymer sheet, when a monomer composition including silver nanowires is polymerized, the monomer composition is allowed to stand in a state in which a thickness direction of the obtained high-molecular-weight polymer sheet before the polymerization is a vertical direction, and the silver nanowires in the monomer composition are oriented in the vertical direction and polymerized.

In a method for producing a high-molecular-weight polymer sheet, when a monomer composition including silver nanowires is polymerized, the monomer composition is allowed to stand in a state in which a thickness direction of the obtained high-molecular-weight polymer sheet before the polymerization is a vertical direction, and the silver nanowires in the monomer composition are oriented in the vertical direction and polymerized.

A composition and method directed to the formation of a biodegradable composition with enhanced mechanical properties is provided. The composition includes starch in an amount from 15-45 %, chitosan in an amount ranging from 1-50 wt%, poly acrylamide in an amount ranging from 1-10 wt %, and water in an amount ranging from 25-85 wt %. The composition can be provided for food packaging or otherwise as a protective material.

A composition and method directed to the formation of a biodegradable composition with enhanced mechanical properties is provided. The composition includes starch in an amount from 15-45 %, chitosan in an amount ranging from 1-50 wt%, poly acrylamide in an amount ranging from 1-10 wt %, and water in an amount ranging from 25-85 wt %. The composition can be provided for food packaging or otherwise as a protective material.

A dental material having (a) at least one radically polymerizable monomer, (b) at least one radiopaque filler, (c) at least one inorganic filler, (d) at least one composite filler, and (e) at least one initiator for the radical polymerization, wherein the monomer (a) comprises at least one urethane (meth)acrylate, at least one radically polymerizable bisphenol A derivative, optionally at least one polycyclic aliphatic dimethacrylate, optionally at least one monomer which does not fall into one of the groups (a-1) to (a-3) and (a-5), and optionally at least one chain regulator (a-5). The dental material allows the fabrication of esthetically pleasing restorations with only one material.

A dental material having (a) at least one radically polymerizable monomer, (b) at least one radiopaque filler, (c) at least one inorganic filler, (d) at least one composite filler, and (e) at least one initiator for the radical polymerization, wherein the monomer (a) comprises at least one urethane (meth)acrylate, at least one radically polymerizable bisphenol A derivative, optionally at least one polycyclic aliphatic dimethacrylate, optionally at least one monomer which does not fall into one of the groups (a-1) to (a-3) and (a-5), and optionally at least one chain regulator (a-5). The dental material allows the fabrication of esthetically pleasing restorations with only one material.

High strength biomedical materials and processes for making the same are disclosed. Included in the disclosure are nanoporous hydrophilic solids that can be extruded with a high aspect ratio to make high strength medical catheters and other devices with lubricious and biocompatible surfaces. Polymers may be entrapped in pores of materials to provide a durable modification of the materials.

High strength biomedical materials and processes for making the same are disclosed. Included in the disclosure are nanoporous hydrophilic solids that can be extruded with a high aspect ratio to make high strength medical catheters and other devices with lubricious and biocompatible surfaces. Polymers may be entrapped in pores of materials to provide a durable modification of the materials.

The invention relates to the technical field of oil and gas drilling, and discloses an amphiphilic block polymer ultralow-permeability agent and an intelligent temporary plugging type water-based drilling fluid. The ultralow-permeability agent contains a structural unit provided by styryl hydrophobic monomer, maleic anhydride and acrylamide; the drilling fluid contains two or more of water, sodium bentonite, Pac-Lv, the ultralow-permeability agent, calcium carbonate, one-way plugging agent, white asphalt and barite which are stored in a mixed manner or independently stored. When the amphiphilic block polymer provided by the invention is used as the ultralow-permeability agent of the intelligent temporary plugging type water-based drilling fluid, the self-adaptive characteristic is realized; according to the amphiphilic block polymer, temporary plugging layer gaps formed in pore and throats by plugging materials in drilling fluid can be fully filled under the condition that the sizes and the distribution of the pore and throats of reservoirs are not required to be clear, so that the permeability of temporary plugging layer is greatly reduced, ultralow-permeability is realized, and the amphiphilic block polymer is weak in tackifying effect, has gel-improving effect and can improve the rheological property of the drilling fluid.

The invention relates to the technical field of oil and gas drilling, and discloses an amphiphilic block polymer ultralow-permeability agent and an intelligent temporary plugging type water-based drilling fluid. The ultralow-permeability agent contains a structural unit provided by styryl hydrophobic monomer, maleic anhydride and acrylamide; the drilling fluid contains two or more of water, sodium bentonite, Pac-Lv, the ultralow-permeability agent, calcium carbonate, one-way plugging agent, white asphalt and barite which are stored in a mixed manner or independently stored. When the amphiphilic block polymer provided by the invention is used as the ultralow-permeability agent of the intelligent temporary plugging type water-based drilling fluid, the self-adaptive characteristic is realized; according to the amphiphilic block polymer, temporary plugging layer gaps formed in pore and throats by plugging materials in drilling fluid can be fully filled under the condition that the sizes and the distribution of the pore and throats of reservoirs are not required to be clear, so that the permeability of temporary plugging layer is greatly reduced, ultralow-permeability is realized, and the amphiphilic block polymer is weak in tackifying effect, has gel-improving effect and can improve the rheological property of the drilling fluid.