6 results about "High-refractive-index polymer" patented technology

The invention discloses a high-refractive-index-difference bottle brush block polymer and a synthetic method of a degradable structural color material, and belongs to the technical field of organic polymers. The end group of the high-refractive-index degradable macromonomer is a cycloolefin derivative capable of performing sequential ring-opening metathesis polymerization reaction (ROMP), and the main chain is a degradable polymer prepared by performing ring-opening copolymerization reaction on styrene oxide (SO) and a comonomer. A series of novel degradable cycloolefin macromonomers are designed and synthesized to replace polystyrene and other non-degradable high-refractive-index polymers commonly used in the field, and the macromonomers and a block copolymer brush are synthesized through ring-opening polymerization and ring-opening metathesis polymerization. And an environment-friendly structural color material capable of covering a full visible light wave band is further prepared by utilizing a phase separation mechanism.

This invention discloses a method for preparing a transparent fire-retardant wood coating, belonging to the field of coating technology. The transparent fire-retardant wood coating includes an inner coating and an outer coating. The preparation method of the inner coating is as follows: a flexible flame retardant is dissolved in water, and tea polyphenol crystals are added to form a flame-retardant mixture; then, it is mixed evenly with an amino resin to obtain a transparent fire-retardant inner coating. The preparation method of the outer coating includes: first, preparing a sulfur-containing all-organic high-refractive-index polymer by catalytic polymerization of bromoalkanes and dithiophenol monomers using an organic base; then, dissolving the polymer in a transparent organic solvent to obtain a high-refractive-index polymer solution; grinding ammonium polyphosphate and pentaerythritol and mixing them evenly with a polysiloxane emulsion to obtain a fire-retardant mixture; finally, adding the high-refractive-index polymer solution, a film-forming aid, and an amino resin to the fire-retardant mixture to obtain a transparent fire-retardant outer coating. This invention achieves good UV resistance in addition to transparency and fire resistance.

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to a hyperbranched high-refractive-index light extraction material and a preparation method and application thereof. According to the material, a monomer with alkynyl and a monomer with disulfydryl are subjected to free radical polymerization to prepare a hyperbranched high-refractive-index polymer containing a high-molar-polarizability component, and the hyperbranched high-refractive-index polymer has the characteristics of excellent transparency and high refractive index. The innovation of the invention lies in that a method of combining normal-temperature sulfydryl-alkyne click polymerization and ultraviolet light-initiated photopolymerization is adopted, and efficient polymerization of alkynyl monomers and disulfydryl monomers is realized, so that the light extraction material with high refractive index and high transparency is obtained. The material has wide application prospects in the fields of organic light emitting diodes (OLEDs), double charge coupled device (CCD) micro lens elements, high-performance complementary metal oxide semiconductor (CMOS) image sensors, all-polymer optoelectronic devices, polymer optical waveguides, photovoltaic devices, storage devices and the like.

A high refractive index polymer material includes a naphthalene group and at least one sulfur atom and is characterized by principal index of refraction nx, ny, and nz that are each greater than 1.5, where the sum of the principal indices of refraction nx + ny + nz is greater than 5.1.

This invention relates to the field of materials technology, specifically to a polymer grating composition. The polymer grating composition comprises an initiator system, a non-reactive solvent system, and a high-refractive-index polymer monomer system; the initiator system includes a photosensitizer and an initiator; the high-refractive-index polymer monomer system includes low-viscosity monofunctional monomers, multifunctional monomers, and high-refractive-index polymer monomers; by mass percentage, the photosensitizer accounts for 0.1%-1%, the initiator accounts for 0.01%-2%, the non-reactive solvent system accounts for 10%-50%, the low-viscosity monofunctional monomer accounts for 0%-30%, the multifunctional monomer accounts for 10%-40%, and the high-refractive-index polymer monomer accounts for 10%-60%. The polymer grating composition of this invention increases the transmittance of the grating; the polymer grating composition of this invention is a high-efficiency composition, exhibiting high diffraction efficiency for both S-rays and P-rays; the polymer grating composition of this invention reduces the light scattering loss of the grating.