8 results about "Glass transition point" patented technology

The present invention provides a magnetic one-component toner that has low-temperature fixing properties and excellent heat resistance and heat stress resistance over long periods, as well as an image forming apparatus using the same. [Solution] The magnetic one-component toner comprises toner matrix particles containing at least a binder resin and magnetic powder, and an external additive attached to the surface of the toner matrix particles. The binder resin comprises an amorphous polyester resin and a crystalline polyester resin containing an aliphatic diol with 3 to 9 carbon atoms, and the amount of crystalline polyester resin added is 5% by mass or less relative to the amorphous polyester resin. When the glass transition point at the first heating, measured by differential scanning calorimeter, is Tg1, and the glass transition point measured when the temperature is raised again after cooling after measuring Tg1 is Tg2, Tg(45) and Tg(25), which are Tg1 measured after being left at 45°C and 25°C for 100 hours, are 0

This invention relates to a method for modeling the curing kinetics of polymer resins, specifically providing a method for fitting the curing kinetics of polymer resins based on a segmented model. The method employs a three-stage segmented kinetic model. In the first stage, an external catalytic model is introduced to quantify the inductive acceleration effect of the co-catalyst in the early stages of the reaction. In the second stage, the Kamal-Sourour model is used to ensure the fitting accuracy of the chemical control region. In the third stage, a diffusion correction term based on thermodynamic evolution is introduced to quantify the diffusion resistance caused by entering the glassy state in the later stages, significantly improving the fitting accuracy at the end of curing. More importantly, this invention creatively proposes a method based on the activation energy minimum point. α tr and dynamic glass transition point α vit The segmentation points effectively couple the external catalytic model, the Kamal-Sourour model, and the dynamic diffusion model, effectively solving the problem of inaccurate fitting of the full-cycle kinetics, improving the fitting accuracy, and providing data support for the fine-tuning of the curing process.

In an ignition unit for a propellant charge (8), comprising an elongated ignition transfer charge (2) made of propellant powder, through which a free ignition channel (5) runs in its longitudinal direction, and a combustible support tube (3) that surrounds the ignition transfer charge (2) perpendicular to the free ignition channel (5), the ignition transfer charge (2) is formed from a first material which has a glass transition point below -40°C in an observed temperature range of -51°C to +71°C, and the support tube (3) is formed from a second material which does not have a glass transition point below +72°C.

Provided is a method for easily disassembling a structure formed by adhesion without leaving an adhesive on a surface of an adherend and without requiring a large load to be applied when peeling an adhesive surface. Provided is a method for disassembling an adhesive structure having a first adherend, a second adherend, and an adhesive layer disposed between the first adherend and the second adherend, the method including: a peeling process of peeling the adhesive layer from at least one of the first adherend and the second adherend by heating the adhesive structure at a temperature of 60°C to 120°C, the adherend being composed of at least one material selected from the group consisting of a heat-treated aluminum alloy, titanium, and a magnesium alloy, and the adhesive layer including a cured product of an adhesive having a normal-temperature curing property and having a glass transition point of 60°C to 120°C.

Provided is a cyclic olefin copolymer composition comprising a cyclic olefin copolymer (A) having a glass transition point (Tg) of more than 100.0°C and a cyclic olefin copolymer (B) having a glass transition point (Tg) of 100.0°C or less. When the total amount of the cyclic olefin copolymer (A) and the cyclic olefin copolymer (B) is taken to be 100 mass parts, the content of the cyclic olefin copolymer (A) is from more than 95.0 mass parts to 99.9 mass parts and the content of the cyclic olefin copolymer (B) is from 0.1 mass part to less than 5.0 mass parts.

Provided are a heat transfer suppression sheet having an excellent heat transfer prevention effect and excellent retainability of inorganic particles and shape retainability at a high temperature, and a battery pack in which the heat transfer suppression sheet is interposed between battery cells. The heat transfer suppression sheet (10) includes inorganic particles (20), first inorganic fibers (30), and second inorganic fibers (31). The first inorganic fibers (30) are amorphous fibers. The second inorganic fibers (31) contain at least one kind selected from amorphous fibers having a glass transition point higher than that of the first inorganic fibers (30) and crystalline fibers.

This invention relates to a chip bonding film, its preparation method, and its application. The chip bonding film comprises, from top to bottom, a first release film, a chip bonding film layer, a pressure-sensitive adhesive layer, and a chip cutting film, arranged layer by layer. The chip bonding film layer comprises, by weight, the following components: epoxy resin, 5-30 parts; phenolic resin, 5-30 parts; and filler, 5-20 parts. The pressure-sensitive adhesive layer comprises, by weight, the following components: acrylic resin, 100 parts; accelerator, 0.1-1 parts; and coupling agent, 1-5 parts. The advantage of this invention is that it uses epoxy resin and phenolic resin to construct the resin matrix. A suitable matrix combined with filler can disperse the filler in a short time, forming a highly stable colloid with a particle size of less than 1 μm. This improves the linear expansion coefficient of the film after the glass transition point (Tg), enhances the adhesion of the film, and avoids cutting defects and weak bonding points caused by filler agglomeration.