32 results about "Light scattering measurement" patented technology

A conjugated diene-based polymer of the present invention has a branch number (Bn) measured by viscosity detector-equipped GPC-light scattering measurement of 8 or more, has a change (ΔT) of an oxidation onset temperature caused through application of a thermal load of 11.9° C. or less, and contains an aromatic vinyl compound monomer unit.

To provide a resin composition having excellent gas barrier property, particularly oxygen barrier property, under high humidity.SOLUTION: A resin composition contains a hydrophilic resin (X) and a metal compound, satisfying the following formula (1): ΔA2=A2-A2,0>0 (1), (where A2 represents a second virial coefficient when the resin composition is subjected to static light scattering measurement using hexafluoroisopropanol as a solvent, and A2,0 similarly represents the second virial coefficient of the hydrophilic resin (X) in the resin composition and ΔA2 is a value represented by A2-A2,0).SELECTED DRAWING: None

The present invention relates to a conjugated diene polymer, a method for producing a conjugated diene polymer, a conjugated diene polymer composition, and a rubber composition. The purpose of the present invention is to provide a conjugated diene polymer which has extremely excellent processability when made into a sulfide, and which has excellent wear resistance, handling stability, and breaking strength after being made into a sulfide. A conjugated diene-based polymer which is a copolymer of a conjugated diene compound and an aromatic vinyl compound, and which has a Mooney viscosity measured at 100 DEG C of 40-170, a Mooney stress relaxation rate measured at 100 DEG C of 0.239-0.35, and a branching degree (Bn) of 8 or more as determined by a GPC-light scattering measurement method with a viscosity detector, and which contains a nitrogen atom.

Provided are a light scattering measuring apparatus. The light scattering measuring apparatus includes: light sources; a single light receiver; a sample holder including a cell, a frame body, a first opening formed in an incident portion of a first optical path used for forward measurement or side measurement, and a second opening formed in an incident portion of a second optical path used for back measurement, and an optical element; and a moving mechanism. The first optical path and the second optical path are separated from each other in vertical direction. The moving mechanism moves the first opening to a position of the incident portion of the first optical path when the forward or side measurement is to be performed, and to move the second opening to a position of the incident portion of the second optical path when the back measurement is to be performed.

This modified conjugated diene polymer satisfies conditions (i) to (v) described below. Condition (i): The Mooney viscosity measured at 100ºC is 100 or more. Condition (ii): The glass transition temperature is -95°C to -45°C. Condition (iii): The content of silicon atoms is 170 ppm or more relative to the total amount of the modified conjugated diene polymer, and the mass ratio of the content of silicon atoms to the content of nitrogen atoms is 3 or more. Condition (iv): The modification rate is 70 mass% or more. Condition (v): The degree of branching (Bn) as determined by a GPC-light scattering measurement method with a viscosity detector is 6 or more.

The invention relates to a method for determining crystal defects in a workpiece made of monocrystalline silicon, comprising the following steps: (i) reactive ion etching at least one surface of the workpiece in a gas mixture comprising oxygen and one or more halogen-containing compounds selected from the group consisting of elemental halogen X2, hydrogen halide HX and nitrogen halide NHnX3-n, wherein X is selected from the group of Cl and Br, and 0 ≤ n ≤ 2, the flow rate of oxygen and of each of the one or more halogen-containing compounds is not less than 5 sccm and not more than 100 sccm, and the at least one surface of the workpiece to be etched is exposed to the gas mixture for no less than 10 seconds and no more than 20 minutes; and (ii) identifying defects on the etched surface of the workpiece by means of light scattering measurement.

Techniques are described herein for air quality sensing. In some examples, the techniques are implemented as an apparatus including first and second light sources, a light detector having a detector output, and a processing circuit having a processing input coupled to the detector output and a processing output. The first light source is configured to generate a first light signal having a first wavelength. The second light source is configured to generate a second light signal having a second wavelength different from the first wavelength. The light detector is configured to generate a first detection signal at the detector output responsive to the first light signal and a second detection signal at the detector output responsive to the second light signal. The processing circuit is configured to generate a third signal representative of an air quality measurement at the processing output responsive to the first and second detection signals.

The invention discloses a dynamic and static light scattering combined image laser two-in-one particle analyzer, which comprises a working box, and is characterized in that a measuring box is fixedly connected in the working box, a camera shooting baffle block fixedly connected with the measuring box is fixedly connected in the working box, and a camera shooting baffle block is fixedly connected with the camera shooting baffle block. A backward detection array is fixedly connected to the top of the camera shooting stop block, and a high-definition camera is fixedly connected to the side, away from the camera shooting stop block, of the interior of the working box. According to the invention, the dynamic light scattering technology and the static light scattering technology are organically combined, the instrument can automatically select the most suitable light scattering mode for measurement according to the preliminary estimated size of the sample particles, the measurement range of the instrument is greatly widened, high-precision measurement of nano-scale to millimeter-scale particles can be realized, and the measurement accuracy is greatly improved except the light scattering technology. A high-resolution image acquisition system is also integrated, and the instrument can image particles in a sample while light scattering measurement is carried out.

The invention is directed to a method for determination of a solid content in an effluent gas stream from a device for cracking a hydrocarbon feedstock, the method comprising: a. providing a device for cracking a hydrocarbon feedstock, which comprises one or more furnaces, one or more heat exchangers and one or more stacks, and providing a light scattering measurement system comprising a laser probe, b. operating the device for cracking a hydrocarbon feedstock at least partly in a decoking mode, wherein a decoking feed stream comprising oxygen, nitrogen and / or water is fed to at least one of the one or more furnaces, the decoking feed stream is heated to a decoking temperature in a range from 500°C to 1500°C and an effluent gas stream comprising carbon monoxide and optionally a solid carbon dioxide, nitrogen and / or water is obtained, c. discharging the effluent gas stream through the one or more heat exchangers and the one or more stacks and d. contacting the laser probe with the effluent gas stream, wherein light scattering data of the effluent gas stream is collected and the solid content of the effluent gas stream is derived from the light scattering data.

The invention discloses an aerosol scattering measurement device and a use method thereof, and belongs to the field of light scattering measurement, the aerosol scattering measurement device comprises an aerosol scattering cylinder, the top and the bottom of the aerosol scattering cylinder are fixedly connected with a top cover and a bottom cover respectively, and a measurement assembly is arranged outside the aerosol scattering cylinder. An aerosol circulation assembly is arranged in the aerosol scattering cylinder and comprises an input pipe which is fixedly connected to the interior of the top cover, and the axis of the input pipe coincides with the axis of the top cover; by arranging the rotatable arc-shaped detection mechanism and the modularized arc-shaped sleeve plate and utilizing a single photoelectric detector to be matched with a precise gear transmission system, full-automatic and multi-angle scanning measurement of scattered light signals is realized, the use number of detectors is remarkably reduced, and the device cost and complexity are greatly reduced; moreover, the angle measurement range is effectively expanded, and an angle scattering distribution diagram with higher spatial resolution is obtained.

The application provides a water body small particle size suspended matter particle size heteroaxial scanning light scattering measurement device and method, which comprises a laser, a beam expander, a small hole, a Fourier lens, a sample cell, a rotating table and a photomultiplier tube; wherein the beam expander, the small hole, the Fourier lens, a diaphragm, the rotating table and the sample cell are sequentially arranged behind the laser; the rotating arm of the rotating table is provided with the photomultiplier tube; the laser emits a single beam of light as an excitation light source of the device, which irradiates the beam expander; the beam expander is used to change the beam diameter and divergence angle of the single beam of light; the beam expander is provided with the small hole and the Fourier lens behind the beam expander, and the small hole is arranged at the common focal point of the beam expander and the Fourier lens; the Fourier lens converges the light beam filtered through the small hole; the Fourier lens is provided with the diaphragm behind the Fourier lens, and the diaphragm is used to filter the edges of the converged light beam, so that the laser beam is more uniform; the diaphragm is provided with the rotating table and the sample cell behind the diaphragm.

A conjugated diene polymer satisfying the following conditions (1) to (5). (1) The molecular weight distribution curve obtained by gel permeation chromatography (GPC) measurement is monomodal and has a shoulder in the region from the peak top of the molecular weight distribution curve to the peak end point on the high molecular weight side. (2) The weight-average molecular weight (Mw) measured by GPC is 200,000 to 1,000,000. (3) The molecular weight distribution is 1.7 to 3.0. (4) The rate of modification is less than 40 mass%. (5) When the absolute molecular weight curve is measured by the GPC-light scattering method equipped with a viscosity detector, in the region on the high molecular weight side rather than the peak top, the absolute molecular weight at the first inflection point is Mw1 and the absolute molecular weight at the peak end point is Mw2, and the degree of branching (Bn) at the absolute molecular weight of (Mw1+Mw2) / 2 is 4 or more. (6) The shrinkage factor (g') in the peak top molecular weight (Mp) obtained by the GPC-light scattering measurement method equipped with a viscosity detector is 0.90 or higher.

Method for identifying metal impurities in a process for manufacturing wafers from semiconductor material, comprising the following steps: (A) Providing a test disk made of semiconductor material characterized in that it has defects which are capable of agglomerating impurities; (B) Performing at least one step of a process for manufacturing disks from semiconductor material using the test disk; (C) Identifying the positions and sizes of defects on the test disc using light scattering measurement; and (D) Investigate at least one of the defects identified in step (C) for the presence of at least one metal using at least one analytical method selected from mass spectrometry, energy-dispersive X-ray spectroscopy or electron energy loss spectroscopy.

The invention relates to the technical field of composite emulsifier monitoring, and discloses a thermal stability monitoring method and system of a composite emulsifier and a storage medium. The method comprises the following steps: performing oil-water interfacial tension dynamic measurement and particle size distribution analysis on an initial emulsion of the compound emulsifier to obtain initial characteristic parameters; constructing a multi-parameter light scattering measurement platform and executing measurement parameter calibration to obtain light scattering measurement calibration parameters; loading the initial emulsion into a multi-parameter light scattering measurement system, and executing thermal cycle treatment according to the light scattering measurement calibration parameters to obtain multi-angle scattering signal data; calculating thermal response characteristic data based on the multi-angle scattered signal data and the initial characteristic parameters, and calculating a multi-stage thermal stability score based on the thermal response characteristic data; and generating a formula parameter optimization scheme based on the multi-stage thermal stability score. The stability change of the compound emulsifier can be monitored in real time in the heat treatment process, and the monitoring efficiency and the optimization accuracy of formula parameters are improved.

Provided are a light scattering measurement device and a light scattering measurement method that specify a material of a particle included in a dispersion liquid including at least one type of particles. The light scattering measurement device includes a light source unit that irradiates the dispersion liquid including at least one type of particles with measurement light, a parameter setting unit that sets at least one of a scattering angle or a measurement wavelength as a measurement parameter, a scattered light measurement unit that obtains a plurality of pieces of scattering intensity data by measuring a scattering intensity of scattered light emitted from the dispersion liquid by the measurement light a plurality of times while changing a value of the measurement parameter a plurality of times, and a calculation unit that calculates scattering intensity time variation characteristic data and scattering intensity parameter-dependent data from the scattering intensity data, and specifies a material of each type of particle of the particles of the dispersion liquid specified by fitting the scattering intensity time variation characteristic data and the scattering intensity parameter-dependent data using a theoretical formula or a simulation based on a theory of electromagnetic wave behavior that defines a relationship of a refractive index, a particle diameter, and the scattering intensity.

In an embodiment there is provided a rubber composition comprising cellulose nanofiber and a branched conjugated diene polymer for which a shrinkage factor (g′) determined by a GPC-light scattering measurement is at least 0.72, the content (ST) of aromatic vinyl monomer and proportion (CS) of a coupling polymer satisfy a prescribed relationship, and the peak top molecular weight Mp1 of a noncoupling polymer and the peak top molecular weight Mp2 of the coupling polymer satisfy a prescribed relationship. In an embodiment there is provided a masterbatch for rubber modification, comprising 100 parts by mass of a first rubber component that contains at least 50 mass % of said branched conjugated diene polymer, and 15 parts by mass to 100 parts by mass of cellulose nanofiber.

To provide magnetic beads capable of suppressing variation in light scattering in light scattering measurement.SOLUTION: A magnetic bead includes a polymer and a magnetic particle modified with a silane coupling agent, wherein the polymer includes a structural unit derived from a monomer (a) having at least one selected from the group consisting of a vinyl group, a vinylidene group, and a (meth)acryloyl group, and the silane coupling agent includes at least one selected from the group consisting of a vinyl group, a vinylidene group, a (meth)acryloyl group, and a styryl group.SELECTED DRAWING: Figure 1

The invention discloses a reflective surface light scattering measurement system and method for a micro-scale limited channel, and belongs to the technical field of fluid interface thermal physical property measurement. The measuring system comprises an optical path measuring system and an adjustable micro-scale channel structure, the light path measurement system comprises a reflective light path measurement module and a signal processing module, and the adjustable micro-scale channel structure comprises a micro-channel construction module and a multi-dimensional adjustable platform; according to the system, a micro-scale limited channel is formed by two base blocks which are oppositely arranged, a multi-dimensional adjustable platform is combined, the parallelism of the opposite surfaces of the channel is kept, meanwhile, continuous adjustment of a channel gap within a preset range is achieved, and therefore fluid interface environments under different limited conditions are constructed. According to the method, continuous adjustment of micron-order width can be realized in a micro-scale limited channel, surface wave signals are acquired at a high signal-to-noise ratio through a small-angle reflective light scattering system, and in-situ measurement of the interface property of the fluid is quickly and accurately realized.

The embodiment of the invention relates to light scattering measurement based on multiple light sources. In some examples, the techniques are implemented as an apparatus that includes first and second light sources (120, 130), a light detector (110) having a detector output, and processing circuitry (180) having a processing input coupled to the detector output and a processing output. The first light source (120 or 130) is configured to generate a first light signal having a first wavelength. The second light source (120 or 130) is configured to generate a second light signal having a second wavelength different from the first wavelength. The light detector (110) is configured to generate a first detection signal at the detector output in response to the first light signal and a second detection signal at the detector output in response to the second light signal. The processing circuit (180) is configured to generate a third signal representative of an air quality measurement at the processing output in response to the first detection signal and the second detection signal.

The present invention achieves good and stable substrate quality in processing of a semiconductor substrate. Provided is a line for manufacturing a semiconductor substrate, the line including a line body and a line control system. The line body includes a processing device for processing the semiconductor substrate, a light scattering measurement device for obtaining measurement values of the intensity of scattered light from the semiconductor substrate by means of a light scattering method, and a conveyance device for conveying the semiconductor substrate. The line control system includes a conveyance control unit which controls the conveyance device on the basis of the measurement values obtained by the light scattering measurement device.

The present invention provides a light scattering measurement device and a measurement fixture capable of performing both forward or lateral and backward measurements, and having a single light receiver, resulting in a compact and low-cost design. The light scattering measurement device comprises: a light source; a single light receiver; a sample holder having a sample cell, a housing, and an optical element. The housing includes a holding space for the sample cell, a first opening forming an entrance portion for a first optical path used for at least one of forward or lateral measurement, and a second opening forming an entrance portion for a second optical path used for backward measurement. The optical element includes a first surface that forms a predetermined angle with a side surface of a cavity. Furthermore, a moving mechanism is provided for vertically moving the measurement fixture. The optical element is positioned at the entrance portion or exit portion of the first or second optical path. The first and second optical paths are separated in the vertical direction. The moving mechanism moves the first opening to the entrance portion of the first optical path when performing forward or lateral measurement, and moves the second opening to the entrance portion of the second optical path when performing backward measurement.

The present invention provides a display device that satisfies the following lt; condition (i) gt; -lt; condition (iii) gt; and a conjugated diene polymer. Lt; condition (i) gt; the Mooney viscosity measured at 100 DEG C is from 80 to 170 (inclusive). Lt; condition (ii) gt; the Mooney stress relaxation (MSR) measured at 100 DEG C is from 0.30 to 0.80 (inclusive). Lt; condition (iii) gt; the polymer has a downward convex extreme value in a branching degree distribution curve indicating the relationship between the absolute molecular weight and the branching degree (Bn) according to a GPC-light scattering measurement method with a viscosity detector.

The utility model provides an annular light scattering measuring device for particulate matters. The annular light scattering measuring device comprises a collimation light source assembly, a conical lens, a measuring chamber and a light receiving assembly, the collimation light source assembly is used for emitting collimation light, and the conical lens, the measuring chamber and the light receiving assembly are sequentially arranged on the front side of the collimation light source assembly; the conical lens is used for converting the collimated light into a light beam with an annular cross section and a conical longitudinal section; the measuring chamber is used for introducing fluid which needs to be measured and contains particulate matters, and the annular light converted by the conical lens forms an annular measuring area in the measuring chamber; scattered light generated by the particulate matters in the annular measuring area is received by the light receiving assembly and is used for evaluating the concentration of the particulate matters. According to the annular light scattering measuring device for the particulate matter, the measuring process of the concentration of the particulate matter is optimized through innovative design, the detection precision and reliability are improved, meanwhile, the structure of an instrument is simplified, and the applicability of the instrument is enhanced.

The present disclosure describes an apparatus, method, system, and computer program product for identifying a cuvette for measuring light scattering of a sample. In an exemplary embodiment, the apparatus includes at least one sensor configured to detect at least one geometric feature of the cuvette and an insulating block configured to maintain a temperature of the at least one sensor within an operating temperature range of the at least one sensor. In an exemplary embodiment, the method, system, and computer program product include receiving a first set of signals from a first sensor directed at the cuvette, receiving a second set of signals from a second sensor directed at the cuvette, and performing a set of logical operations to detect the geometric feature of the cuvette.

A conjugated diene-based polymer, satisfying the following <condition (i)> to <condition (iii)>: <condition (i)> a Mooney viscosity measured at 100°C is 80 or more and 170 or less; <condition (ii)> a Mooney stress relaxation (MSR) measured at 100°C is 0.30 or more and 0.80 or less; and <condition (iii)> the polymer has an extreme value that is convex downward in a branch number distribution curve indicating a relationship between an absolute molecular weight and a branch number (Bn), as measured by viscosity detector-equipped GPC-light scattering measurement.

Techniques are described herein for air quality sensing. In some examples, the techniques are implemented as an apparatus including first and second light sources, a light detector having a detector output, and a processing circuit having a processing input coupled to the detector output and a processing output. The first light source is configured to generate a first light signal having a first wavelength. The second light source is configured to generate a second light signal having a second wavelength different from the first wavelength. The light detector is configured to generate a first detection signal at the detector output responsive to the first light signal and a second detection signal at the detector output responsive to the second light signal. The processing circuit is configured to generate a third signal representative of an air quality measurement at the processing output responsive to the first and second detection signals.

The ultra-low concentration dynamic light scattering inversion method based on non-Gaussian autocorrelation function belongs to the technical field of nanoparticle size detection. Step 1001, set the fitting target function and the fitting initial value; step 1002, determine the adjustment range of the focusing waist radius; step 1003, calculate the root mean square error of the autocorrelation function; step 1004, increase the focusing waist radius value; step 1005, w0>0.1um, return to step 1003, w0≤0.1um, execute step 1006; step 1006, obtain the minimum value of the root mean square error of the autocorrelation function; step 1007, obtain the optimal value of the focusing waist radius to correct the non-Gaussian autocorrelation function model; step 1008, reconstruct the kernel matrix; step 1009, invert the particle size distribution. In this ultra-low concentration dynamic light scattering inversion method based on non-Gaussian autocorrelation function, the optimal focusing beam waist radius value is used to correct the non-Gaussian correlation function theoretical model to obtain a kernel matrix that matches the measured data, which significantly improves the particle size inversion accuracy of ultra-low concentration dynamic light scattering measurement.

The application relates to the technical field of composite emulsifier monitoring, and discloses a thermal stability monitoring method and system of a composite emulsifier and a storage medium. The method comprises the following steps: performing oil-water interfacial tension dynamic measurement and particle size distribution analysis on initial emulsion of the composite emulsifier to obtain initial characteristic parameters; constructing a multi-parameter light scattering measurement platform and performing measurement parameter calibration to obtain light scattering measurement calibration parameters; loading the initial emulsion into the multi-parameter light scattering measurement system, and performing thermal cycle processing according to the light scattering measurement calibration parameters to obtain multi-angle scattering signal data; calculating thermal response characteristic data based on the multi-angle scattering signal data and the initial characteristic parameters, and calculating multi-stage thermal stability scores based on the thermal response characteristic data; and generating a formula parameter optimization scheme based on the multi-stage thermal stability scores. The application can monitor the stability change of the composite emulsifier in real time during the thermal treatment process, and improves the monitoring efficiency and the optimization accuracy of the formula parameters.

The application discloses a light scattering suspended drop shape parameter measurement system and method, and belongs to the technical field of fluid characteristic research. The method comprises the following steps: using a monochromatic coherent laser beam, expanding the laser beam into an incident light with a beam width of 3-5 times of the diameter of the suspended drop to uniformly irradiate the suspended drop; adopting a combined bilinear CCD detector to respectively collect first-order rainbow signals and second-order rainbow signals generated by the suspended drop scattering; performing fast Fourier transform filtering on the collected signals, reconstructing a scattering angle distribution diagram after filtering out high-frequency components; extracting the positions and intensities of multiple groups of scattering peak values in the scattering angle distribution diagram, calculating the radius of the suspended drop through the position interval of the multiple groups of peak values, and calculating the vertical direction curvature radius of the suspended drop through the ratio of the multiple groups of peak values of the first-order rainbow and the second-order rainbow. The method breaks through the limitation that the existing light scattering measurement method can only be applied to spherical liquid drops / circular liquid columns, and successfully expands the light scattering measurement technology to the shape parameter measurement of non-spherical liquid drops.