665 results about "Differential scanning calorimetry" patented technology

Provided is a poly(3-hydroxybutyrate) resin tube including a poly(3-hydroxybutyrate) resin, the tube having a wall thickness of 0.1 to 0.6 mm. The difference between the melting point peak temperature and the melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin is preferably 10° C. or higher. Preferably, production of the tube includes the step of melting a poly(3-hydroxybutyrate) resin in an extruder, then extruding the resin from an annular die, and introducing the resin into water, the annular die temperature being set to a temperature between the melting point peak temperature and the melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin.

The present invention relates to a separator including a coating layer and a substrate, wherein phase-change peak temperatures measured by differential scanning calorimetry (DSC) at the time of a first temperature increase and at the time of a second temperature increase satisfy specific ranges, a method of producing the same, and an electrochemical device including the same. More particularly, the present invention relates to a separator that has improved thermal resistance and thus may improve battery safety and implement stable movement of lithium ions and a lithium secondary battery including the same.

The compound contains an epoxy resin (A), magnetic particles (C), and a curing agent (D). In differential scanning calorimetry of the compound, (X) and (Y) satisfy formula (1) and formula (2), where (X) is a heating vertex temperature of a heat quantity curve at a temperature increase rate of 2°C / min of the compound, and (Y) is a heating vertex temperature of a heat quantity curve at a temperature increase rate of 2°C / min after the compound is pressurized at 200 MPa for 5 minutes. 100 ≤ (X) ≤ 200 … (1) (X) - (Y) ≥ 3 … (2)

The invention discloses a method for comprehensively evaluating the curing degree of a thermosetting composite material based on a differential scanning calorimetry, which comprises the following steps of: carrying out layered sampling according to the layering design of a to-be-detected thermosetting composite material workpiece, and taking a prepreg of the to-be-detected thermosetting composite material workpiece as a reference substance; all samples are crushed and fully mixed for differential scanning calorimetry, and the curing degree of the to-be-detected thermosetting composite material part is comprehensively evaluated. According to the method, the problem of sample heterogeneity existing in detection of the curing degree of the thermosetting composite material by a differential scanning calorimetry method is solved, and a rapid and accurate detection method is provided for detection of the curing degree of the thermosetting composite material. Meanwhile, layered sampling is carried out on the formed thermosetting composite material, the temperature program of the prepreg takes-50 DEG C as the initial temperature, the heat flow difference between the thermosetting composite material and the reference substance is fully measured, the detection accuracy is ensured, and the method has good application value and prospects.

The invention relates to a crystal form I, a crystal form II, a crystal form III, a crystal form IV and a crystal form V of (S)-indobufen sodium salt as well as a preparation method and application of the crystal form I. The five crystal forms of the (S)-indobufen sodium salt are comprehensively characterized by X-ray diffraction, differential scanning calorimetry and thermogravimetric analysis. The (S)-indobufen sodium salt crystal form provided by the invention is stable in quality and easy to store, and can be used for preparation production. The preparation method is simple to operate, safe, environment-friendly, low in cost and suitable for industrial production.