100 results about "Thermomechanical analysis" patented technology

Toner contains a binder resin, wherein the binder resin contains a block copolymer A containing a crystalline segment X and a non-crystalline segment Y, wherein the toner has a thermo-mechanical analysis (TMA) compressive deformation amount (TMA %) of 10% or less at 50° C. and a relative humidity of 90%, wherein the toner has a spin-spin relaxation time (t130) of 10 ms or greater at 130° C. as measured by pulse nuclear magnetic resonance (NMR), wherein the toner has a spin-spin relaxation time (t′70) of 1 ms or less at 70° C. as measured by pulse NMR when descending from 130° C. to 70° C.

A microporous polyolefin membrane comprising a polyethylene resin, and having (a) a shutdown temperature of 135° C. or lower, at which the air permeability measured while heating at a temperature-elevating speed of 5° C./minute reaches 1×10⁵ sec/100 cm³, (b) a maximum melting shrinkage ratio of 40% or less in a transverse direction in a temperature range of 135 to 145° C., which is measured by thermomechanical analysis under a load of 2 gf and at a temperature-elevating speed of 5° C./minute, and (c) a meltdown temperature of 150° C. or higher, at which the air permeability measured while further heating after reaching the shutdown temperature becomes 1×10⁵ sec/100 cm³ again.

A microporous polyolefin membrane comprising a polyethylene resin, and having (a) a shutdown temperature of 135° C. or lower, at which the air permeability measured while heating at a temperature-elevating speed of 5° C./minute reaches 1×10⁵ sec/100 cm³, (b) a maximum melting shrinkage ratio of 40% or less in a transverse direction in a temperature range of 135 to 145° C., which is measured by thermomechanical analysis under a load of 2 gf and at a temperature-elevating speed of 5° C./minute, and (c) a meltdown temperature, at which the air permeability measured while further heating after reaching the above shutdown temperature becomes 1×10⁵ sec/100 cm³ again, being 150° C. or higher.

Biaxially oriented polyester films which have a polyester-containing base layer (B) and a matt overlayer (A), and are characterized by the following features: a) the transverse shrinkage of the film is between 1 and 2.3%, b) the transverse linear expansion of the film during thermo-mechanical analysis is smaller than or equal to 0.2%, c) the matt overlayer comprises particles, preferably SiO₂, whose median diameter is from 2 to 10 μm and whose SPAN98 is smaller than or equal to 2, and d) the matt overlayer (A) comprises a polyester which has from 4 to 30 mol % of isophthalic acid units are notable in particular for low opacity, high transparency and low gloss of the overlayer (A), and are therefore suitable as flexible packaging films and for the purposes of hot lamination.

The present invention relates to a microporous polyolefin film suitable as a separator for batteries and thermal properties thereof. A microporous polyolefin film according to the present invention has a film thickness of 5-40 μm, a porosity of 30%-60%, a permeability of 2.0×10⁻⁵-8.0×10⁻⁵ Darcy, a maximum pore size determined by the bubble point method of not more than 0.1 μm, a puncture strength of 0.20 N/μm or more at room temperature and 0.05 N/μm or more at 120° C., and a maximum shrinkage ratio in the transverse direction (TD) when subjected to a thickness-normalized external force in TMA (thermo-mechanical analysis) of not more than 0%. With excellent thermal stability at high temperature as well as superior puncture strength and gas permeability, the microporous polyolefin film according to the present invention is suitable for high-capacity, and high-power batteries.

Provided is a porous multi-layer film having two or more layers that is used as a separator for battery. In the film, more than 2 layers have different porosities and pore sizes. The film has a thickness of 9 to 50 μm, a machine direction (MD) loop stiffness of 0.008 mg/μm or more, puncture strength of 0.15 N/μm or more, permeability of 1.5×10⁻⁵ Darcy or more, shut-down temperature of 140° C. or less, melt-down temperature of 170° C. or more, a transverse direction (TD) maximum shrinkage of 25% or less in Thermomechanical Analysis (TMA) under a load of 1 mN/(1 μm×6 mm), and melt down temperature of 160° C. or more. Since the porous multi-layer film shows excellent thermal stability at high temperature and electrolyte retaining property due to a dual pore structure, the film shows a superior effect when used as a separator for high-capacity/high-power lithium ion battery.

The present invention relates to a substrate with a transparent electrode, which has a transparent electrode layer on at least one surface of a transparent film base material. The transparent film base material has a transparent dielectric material layer containing an oxide as a main component on a surface at the transparent electrode layer side. In one embodiment of the present invention, the transparent electrode layer is a crystalline transparent electrode layer that has a crystallinity degree of 80% or more. In this embodiment, the crystalline transparent electrode layer has a resistivity of 3.5×10⁻⁴ Ω·cm or less, a thickness of 15 nm to 40 nm, an indium oxide content of 87.5% to 95.5%, and a carrier density of 4×10²⁰/cm³ to 9×10²⁰/cm³, and the substrate with the transparent electrode preferably has a heat shrinkage start temperature of 75° C. to 120° C. as measured by thermomechanical analysis.

A battery separator which is a laminated polyolefin microporous membrane, comprising a polyolefin microporous membrane, and a modifying porous layer comprising a water-soluble resin or water-dispersible resin, and fine particles, the modifying porous layer being laminated on at least one surface of the polyolefin microporous membrane, wherein the polyolefin microporous membrane comprises a polyethylene resin and has (a) a shutdown temperature (a temperature at which an air resistance measured while heating the polyolefin microporous membrane at a temperature rise rate of 5° C./min reaches 1×10⁵ sec/100 cc) of 135° C. or lower, (b) a rate of air resistance change (a gradient of a curve representing dependency of the air resistance on temperature at an air resistance of 1×10⁴ sec/100 cc) of 1×10⁴ sec/100 cc/° C. or more, (c) a transverse shrinkage rate at 130° C. (measured by thermomechanical analysis under a load of 2 gf at a temperature rise rate of 5° C./min) of 20% or less, and a thickness of 16 μm or less, the shutdown temperature difference between the polyolefin microporous membrane and the laminated polyolefin microporous membrane being 4.0° C. or less. A method of producing the same.

Provided is a battery separator with excellent adhesion and shutdown properties comprising a modifying porous layer and a polyolefin microporous membrane.

The invention discloses a method for measuring expansibility of catalytic converter seal gasket. The method comprises the following steps: (1) sampling; (2) preparing test samples; (3) placing the samples: the test samples are placed under the movable end of a quartz glass rod in a thermal expansion analyzer and pressure of 1345 g is provided above the quartz glass rod; (4) then switching on a heating switch of a heating device in the thermal expansion analyzer and heating at the heating speed of 15/min until the temperature reaches 750 DEG C; recording primary measuring data by a recorder in a thermal mechanical analyzer; when the temperature is reduced to the indoor temperature, heating continuously, controlling the temperature between 200 DEG C and 700 DEG C and conducting the circulation test for 50 times; after the circulation is over, the thermal expansion analyzer is automatically closed by the system and the samples are taken out after the temperature the device is reduced naturally; recording the data measured for 50 times by the recorder in the thermal expansion analyzer; (5) calculating thermal expansion performance parameters. The measuring method provided by the invention is simple, convenient and high in precision.

The invention discloses a method and device for correcting temperature of a thermal mechanical analyzer tensile fixture. According to the method, a metal sample with a known melting point is fixed in a sample support of the tensile fixture, a probe is made to be in direct contact or indirect contact with the sample, when the sample is heated to be in a melting state, the probe can induct the sudden change of displacement, the temperature of the sample at the moment is measured through a thermocouple, and the temperature value and the actual melting point of the sample are compared and analyzed so that temperature correction can be carried out. Before a tensile mode is carried out by a thermal mechanical analyzer, temperature correction is carried out on the thermal mechanical analyzer with the metal sample with the known melting point, temperature parameters can be more accurate when the tensile mode is carried out, and the fact that the testing result of the tensile mode is more accurate is guaranteed.

The present invention has its object to provide a thermally expandable microcapsule, which shows excellent heat resistance and a high expansion ratio and thereby can be suitably used for molding processes involving high shearing force, such as kneading molding, calender molding, extrusion molding, and injection molding. The present invention also has its object to provide a foamed product using the thermally expandable microcapsule. The present invention relates to a thermally expandable microcapsule, which comprises: a shell made of a polymer; and a volatile expansion agent as a core agent encapsulated in the shell, the storage elastic modulus (E′) of the shell at a temperature of 200° C. and a frequency of 10 Hz being 1×10⁵ N/m² or more, the storage elastic modulus (E′) of the shell at a temperature of 250° C. and a frequency of 10 Hz being 1×10⁵ N/m² or more, and a maximum displacement amount measured by thermomechanical analysis being 300 μm or more.

The invention relates to the technical fields of biological computing and Monte Carlo simulation, and particularly discloses a Monte Carlo simulation-based protein thermomechanical-analysis method, which comprises the following steps of A, determining a protein energy model; B, simulating and calculating the state density of a protein system. According to the method, the whole thermomechanical process of protein folding can be efficiently analyzed and researched to further explore and research a protein folding process.

The invention discloses a device and a method for testing the wet expansion coefficient of a carbon fiber composite material. The main body of the device adopts a thermal mechanical analyzer (TMA), the device is improved based on the TMA and equipped with a set of humidity controller for controlling humidity precision, the humidity controller comprises a water steam boiler and a humidity sensor, and the humidity control range is within 5-100 percent; within a certain humidity range, a wet deformation test is performed by using a displacement sensor and a mechanical sensor of the TMA. The device for testing the wet deformation has the characteristics of high testing speed, wide testing range, high resolution ratio and the like, and the requirement for the wet deformation test of various composite materials can be satisfied.

According to the present invention, the following adhesive-loaded porous membrane is provided: using a needle probe type thermomechanical analyzer, a probe with a diameter of 1 mm is placed on the porous membrane under a load of 70 g, and the temperature is raised from room temperature at a rate of The porous membrane was heated at 2°C/min to measure its thickness, and a porous membrane at a temperature equal to or higher than 200°C when the thickness of the porous membrane became 1/2 of the thickness when the probe was placed at this time was used as a base material A porous membrane, a partially crosslinked adhesive formed by reacting a polyfunctional isocyanate with a reactive polymer having a functional group capable of reacting with an isocyanate group is supported on the porous membrane of the base material, and a part of it is crosslinked to form a battery Adhesive-loaded porous membrane for separators. Such a porous film (separator) is temporarily bonded to the electrodes to form an electrode/separator laminate. By using this laminate in the manufacture of batteries, there is no mutual slippage between the electrodes and the separator, and batteries can be manufactured efficiently. Moreover, the porous membrane (separator) itself does not melt or break at high temperature after the battery is manufactured, and also plays the role of a separator with little heat shrinkage.

Disclosed herein is a transparent electrode, including: a polyimide film having an average linear thermal expansion coefficient of 50.0 ppm/° C. or less, which is measured by thermo-mechanical analysis based on a film thickness of 50˜100 μm at a temperature of 50˜250° C., and a yellowness of 15 or less; and an electrode layer including a conductive material and a polyimide resin having an average linear thermal expansion coefficient of 50.0 ppm/° C. or less, which is measured by thermo-mechanical analysis based on a film thickness of 50˜100 μm at a temperature of 50˜250° C., and a yellowness of 15 or less. The transparent electrode is advantageous in that a problem of a short circuit does not occur even when apparatuses including this transparent electrode are over-heated because it has excellent heat resistance, and in that it is transparent and has high electroconductivity.

The invention discloses a liquid crystal polyester and its molded composition and use. The liquid crystal polyester comprises repeated structural units [I]-[IV]. A dynamic thermomechanical analysis (DMA) test proves that the liquid crystal polyester has a storage modulus release rate delta G greater than or equal to 95.0% and less than or equal to 99.4% defined in the formula (1) of delta G=[G(-50)-G(melting point)]/G(-50)*100%. The liquid crystal polyester has a storage modulus release rate delta G greater than or equal to 95.0% and less than or equal to 99.4%. The liquid crystal polyester and the liquid crystal polyester molded composition have good fluidity and excellent melting characteristics. A small thin wall molded product has high stability and is especially suitable for a thin wall electronic product.

Disclosed is a polyurethane urea elastic fiber containing 5-40% by weight of a polyurethane compound, wherein the compression deformation starting temperature determined by thermomechanical analysis (TMA) is not less than 150° C. but not more than 180° C. and time for thermal cutting at 180° C. is not less than 30 seconds.

The invention relates to the field of gasifying of biomass energy sources, in particular to a method for analyzing melting characteristics of biomass ash. The method uses a thermal mechanical analyzer to test, and specifically comprises the following steps of preparing a biomass ash sample, testing the melting characteristics of the biomass ash, and analyzing a curve of the melting characteristics of the biomass ash; respectively defining the feature temperature Ts of a biomass ash sintering phase and the feature temperature Tm of a biomass ash melting phase, and utilizing the feature temperatures to analyze and evaluate the melting characteristics of the biomass ash; utilizing the feature temperature Tm to predict the agglomeration flow loss temperature caused by the melting of the biomass ash in the combusting and gasifying processes of a fluidized bed. The method has the advantages that the melting characteristics of the biomass ash in the whole heating process can be continuously observed, and the change caused by the viscosity and temperature characteristics of the biomass ash under high-temperature condition can be presented in the test process, so that when a thermal mechanical analyzing method is used for testing the melting characteristics of the biomass ash, the melting characteristics of the biomass ash can be more objectively and comprehensively reflected; the repeatability is good, and the accuracy is high.

The invention relates to a method for predicting output power of organic Rankine cycle on the basis of a BP neural network and belongs to the field of thermal power engineering. The method comprises the following steps: acquiring multiple groups of organic Rankine cycle operation data, wherein each group comprises the following parameters: the volume flow of an organic working medium, the torque of an expansion machine, the inlet pressure of the expansion machine, the outlet pressure of the expansion machine, the inlet temperature of the expansion machine, the outlet temperature of a condenser, the outlet pressure of a working medium pump and the output power of the expansion machine; performing normalization processing on the acquired data; establishing the BP neural network; training andtesting the neural network; and performing inverse normalization processing on the output power of the expansion machine, namely the output data of the neural network, in the test data. Compared withthe traditional thermomechanical analysis method, the constructed neural network model can predict the output power of the organic Rankine cycle rapidly and accurately, can avoid research on the operation mechanism of each part of the system, can obviously improve the working efficiency and the prediction precision and provides reliable guidance for optimization of the organic Rankine cycle.

Provided is a lithium ion secondary battery including: a package; and a power generating element disposed in the package, the power generating element including: a positive electrode; a negative electrode; a separator; and an electrolyte solution, and the separator having a shrinkage rate of 10% or less at 150° C. obtained by a thermomechanical analysis.

The invention relates to a compressing model sample disc for a dynamic thermal mechanical analyzer. The sample disc is filled with an amorphous state powder polymer sample and combines a needle model probe of the dynamic thermal mechanical analyzer to measure the glass-transition temperature of the sample. The sample disc is characterized in that the cross section of a groove disc is a round, the vertical section of the sample disc is of a U shape, the inner diameter of the groove disc is 5.0-8.0mm, the thickness of the groove disc is 0.5-1.5mm, and the height of the groove disc is 2.0-5.0mm. A cover of the compressing model sample disc provided by the invention is characterized by being matched to design with the sample disc, wherein the sample cover is a round slice, the diameter of the sample cover is slightly less than the inner diameter of the sample disc, the sample cover is embedded into the disc and fully covers a powder sample, and the thickness of the sample cover is 0.2-1.5mm.

While a molten metal obtained by melting silver and a metal, which is selected from the group consisting of tin, zinc, lead and indium, in an atmosphere of nitrogen is allowed to drop, a high-pressure water (preferably pure water or alkaline water) is sprayed onto the molten metal in the atmosphere or an atmosphere of nitrogen to rapidly cool and solidify the molten metal to produce a silver alloy powder which comprises silver and the metal which is selected from the group consisting of tin, zinc, lead and indium and which has an average particle diameter of 0.5 to 20 μm, the silver alloy powder having a temperature of not higher than 300° C. at a shrinking percentage of 0.5%, a temperature of not higher than 400° C. at a shrinking percentage of 1.0% and a temperature of not higher than 450° C. at a shrinking percentage of 1.5% in a thermomechanical analysis.

A method for producing a fiber-reinforced composite material is provided. By satisfying particular conditions, this method is capable of suppressing the problem of poor appearance caused by the release film in the production of the fiber-reinforced composite material having a three-dimensional shape by heat-press molding to enable production of the fiber-reinforced composite material having a high quality appearance in high cycle.

A method for manufacturing a fiber-reinforced composite material wherein a fiber-reinforced substrate containing a reinforcing fiber (A) and a thermosetting resin (B) is sandwiched between release films (C) to constitute a layered material, and the layered material is pressed in a mold heated to molding temperature to thereby cure the thermosetting resin (B), wherein

• • the method satisfies the following (i), (ii), and (iii) or (i), (ii), and (iv):
  • (i) the fiber-reinforced composite material has at least 1 bent part,
  • (ii) the molding temperature is 130 to 180° C., and pressure application time is 0.5 to 20 minutes,
  • (iii) the release film (C) has a thermal contraction rate satisfying the following expressions (1) and (2):

0<Ta≤20  expression (1), and

1≤Ta−Tb≤20  expression (2),

• • Ta: the thermal contraction rate (%) of the release film (C) measured by using a thermomechanical analyzer at the temperature the same as the molding temperature
  • Tb: the thermal contraction rate (%) of the release film (C) measured by using a thermomechanical analyzer at a temperature 30° C. lower than the molding temperature, and
  • (iv) hardness of the fiber-reinforced substrate and the hardness of the release film (C) measured by using a durometer corresponding to JIS-K-7215, type A satisfy the following expressions (3) and (4):

0.8≤Hrc/Hrf≤1.2  expression (3),

1<Hhc/Hhf≤1.5  expression (4),

• • Hrc: hardness of the release film (C) at 30° C.,
  • Hrf: hardness of the fiber-reinforced substrate at 30° C.,
  • Hhc: hardness of the release film (C) at the molding temperature,
  • Hhf: hardness of the fiber-reinforced substrate at the molding temperature.