A preparation method of a vanadium oxide powder with high phase-transition latent heat includes steps of taking vanadium pentoxide, oxalic acid and PVP as raw materials, preparing a B-phase VO.sub.2 nano-powder modified by the PVP, and then annealing the B-phase VO.sub.2 nano-powder modified by the PVP at high temperature in an oxygen atmosphere, and obtaining the vanadium oxide powder with high phase-transition latent heat which includes M-phase VO.sub.2 with a mass percentage in a range of 96-99% and V.sub.6O.sub.13 with a mass percentage in a range of 1-4%, and has the phase-transition latent heat larger than 50 J/g. Compared with the vanadium oxide powder prepared by a traditional method without PVP modification and using a vacuum annealing process, the phase-transition latent heat of the vanadium oxide powder provided by the present invention is increased by at least 60%.

A preparation method of a vanadium oxide powder with high phase-transition latent heat includes steps of taking vanadium pentoxide, oxalic acid and PVP as raw materials, preparing a B-phase VO.sub.2 nano-powder modified by the PVP, and then annealing the B-phase VO.sub.2 nano-powder modified by the PVP at high temperature in an oxygen atmosphere, and obtaining the vanadium oxide powder with high phase-transition latent heat which includes M-phase VO.sub.2 with a mass percentage in a range of 96-99% and V.sub.6O.sub.13 with a mass percentage in a range of 1-4%, and has the phase-transition latent heat larger than 50 J/g. Compared with the vanadium oxide powder prepared by a traditional method without PVP modification and using a vacuum annealing process, the phase-transition latent heat of the vanadium oxide powder provided by the present invention is increased by at least 60%.

The latex polymer compositions of the present invention exhibit latent crosslinking properties. Latent crosslinking in the polymers takes advantage of the fast interaction between the anionic latex charge and the cationic charge associated with polyfunctional amine crosslinkers. Once the latex is coated onto a substrate, the volatile base evaporates and the groups react to form a crosslinked coating with improved wash-off properties.

The latex polymer compositions of the present invention exhibit latent crosslinking properties. Latent crosslinking in the polymers takes advantage of the fast interaction between the anionic latex charge and the cationic charge associated with polyfunctional amine crosslinkers. Once the latex is coated onto a substrate, the volatile base evaporates and the groups react to form a crosslinked coating with improved wash-off properties.

The present specification relates to a polymer including a unit represented by Formula 1, a coating composition including the same, and an organic light emitting device formed by using the same.

The present specification relates to a polymer including a unit represented by Formula 1, a coating composition including the same, and an organic light emitting device formed by using the same.

The present invention provides methods of making polymer-based multilayer thin films, and polymer-based multilayer thin films made thereof, using controlled hydrolysis of functional side groups, such as azlactone groups, to obtain desired levels of roughness, porosity, and chemical reactivity.

The present invention provides methods of making polymer-based multilayer thin films, and polymer-based multilayer thin films made thereof, using controlled hydrolysis of functional side groups, such as azlactone groups, to obtain desired levels of roughness, porosity, and chemical reactivity.

The present invention belongs to the technical field of marine anti-fouling materials, and discloses a self-polishing zwitterionic anti-fouling resin having a main chain degradability and the preparation therefor and the use thereof. The self-polishing zwitterionic anti-fouling resin is formed by copolymerizing the following three monomers (in the total mass of the monomers): 1% to 80% of an olefinic reactive monomer, 1% to 80% of a cycloketene acetal monomer, and 1% to 80% of a betaine type precursor. The anti-fouling resin has a main chain degradability and a side chain hydrolyzability, and the transition of a coating from being hydrophobic to being hydrophilic is achieved by the hydrolysis of a surface to produce a super-hydrophilic zwitterionic surface, in order to further enhance the anti-fouling ability of the system. The material not only overcomes the disadvantages of poor mechanical properties and poor solubility in an organic solvent of a zwitterionic material, but can also effectively control the long-term stable release of an anti-fouling agent, so as to achieve a synergistic anti-fouling effect of the anti-fouling agent and an anti-protein. The method of the present invention is simple, has a relatively low cost, and is suitable for industrial production. The material is used in the field of marine anti-fouling coatings.

The present invention relates to a shrink material composition for fattening a resist pattern prepared from a negative-tone lithography process, comprising at least one polymer and at least one organic solvent, wherein the at least one polymer comprises at least one structural unit of a nitrogen heteroaromatic ring system.