Measuring method for content of DBD (2, 2'-diphenyle formamidodiphenyl disulphide) in rubber chemical peptizer

A method of determination and technology of peptizers, applied in the direction of measuring devices, scientific instruments, instruments, etc., can solve the problem that there is no literature report on the determination of the content of DBD in the main body of peptizers, and achieve simple and easy processing and accurate analysis with high accuracy and good reproducibility

Active Publication Date: 2015-03-25
BEIJING RED AVENUE INNOVA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] At present, the quality indicators of such products are mainly appearance, heat loss (105°C), sieve residue (100 mesh) and

Method used

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  • Measuring method for content of DBD (2, 2'-diphenyle formamidodiphenyl disulphide) in rubber chemical peptizer
  • Measuring method for content of DBD (2, 2'-diphenyle formamidodiphenyl disulphide) in rubber chemical peptizer
  • Measuring method for content of DBD (2, 2'-diphenyle formamidodiphenyl disulphide) in rubber chemical peptizer

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Experimental program
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Embodiment 1

[0047] Embodiment 1: the analysis of DBD content in the known chemical peptizer product

[0048] (1) Sample preparation: Weigh 26.45mg, 29.36mg, and 27.82mg of known chemical peptizer products (DBD theoretical content 40%) respectively, as three parallel samples, accurate to 0.1mg, and put them into a 50mL volumetric flask , add 40mL acetone to dissolve and sonicate for 10min, after standing still for 30min, dilute the volume of acetone to the mark. Shake the volumetric flask to mix the solution evenly, pipette part of the solution with a 2ml syringe, filter it with a 0.45 μm filter membrane, and then enter the filtrate into a high-performance liquid chromatograph for testing.

[0049] (2) Preparation of standard solution: Take 39.9mg of DBD standard substance, accurate to 0.1mg, put it into a 100mL volumetric flask, dissolve it with acetone and set the volume to the mark. Use a 5mL pipette to pipette 5mL of DBD mother liquor to a 10mL volumetric flask, take a 1mL pipette to ...

Embodiment 2

[0064] Embodiment 2: the analysis of DBD content in the chemical peptizer product Renacit 11

[0065] (1) Sample preparation: Weigh 30.0mg of chemical peptizer product, accurate to 0.1mg, put it into a 50mL volumetric flask, add 30mL of methanol to dissolve and ultrasonicate for 30min, after standing for 30min, dilute the methanol to the scale line . Shake the volumetric flask to mix the solution evenly, pipette part of the solution with a 2ml syringe, filter it with a 0.45 μm filter membrane, and test the filtrate with a high performance liquid chromatograph.

[0066] (2) Preparation of standard solution: Take 34.1mg of DBD standard substance, accurate to 0.1mg, put it into a 100mL volumetric flask, dissolve it with methanol and set the volume to the mark. Use a 5mL pipette to pipette 5mL of the DBD mother liquor to a 10mL volumetric flask, take a 1mL pipette to pipette 1mL of the mother liquor to the 5mL and 10mL volumetric flasks, and then use a 1mL pipette to pipette 0.50...

Embodiment 3

[0071] Embodiment 3: Analysis of DBD content in the chemical peptizer product Renacit 11

[0072] (1) Sample preparation: Weigh 30.5mg of chemical peptizer product, accurate to 0.1mg, put it into a 50mL volumetric flask, add 40mL of acetonitrile to dissolve and sonicate for 30min, after standing for 30min, dilute acetonitrile to the scale line . Shake the volumetric flask to mix the solution evenly, pipette part of the solution with a 2ml syringe, filter it with a 0.45 μm filter membrane, and then enter the filtrate into a high-performance liquid chromatograph for testing.

[0073] (2) Preparation of standard solution: Take 33.2mg of DBD standard substance, accurate to 0.1mg, put it into a 100mL volumetric flask, dissolve it with acetonitrile and set the volume to the mark. After filtering with a 0.45 μm filter membrane, enter the high-performance liquid chromatograph for testing.

[0074] (3) Test conditions: Waters 2996 diode array detector, detection wavelength 254nm; Wat...

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Abstract

The invention provides a measuring method for content of 2, 2'-diphenyle formamidodiphenyl disulphide (DBD) in a rubber chemical peptizer. The measuring method comprises the following steps: adding a solvent to dissolve a sample, testing filtrate by use of an efficient liquid-phase chromatographic instrument after filing by use of a filter film, and quantitatively measuring the content of the DBD in the sample by comparing with a DBD standard solution. The measuring method disclosed by the invention is flexible in chromatographic column and detector type selection, simple and easy in pre-treatment process, short in analysis time, and high in precision and accuracy, and adopts normal and easily available reagents.

Description

technical field [0001] The invention belongs to the field of analysis of rubber processing aids, in particular to a method for determining the content of 2,2'-dibenzamidodiphenyl disulfide (DBD) in rubber chemical peptizers. Background technique [0002] Rubber is a high-molecular polymer with good elasticity. This macromolecular structure makes its viscosity too high, which brings great inconvenience to the operation processes such as mixing, calendering, extrusion, and molding, and is difficult to process and shape into various rubber products. In order to improve the processing performance of rubber, it is necessary to properly reduce the molecular weight of rubber, reduce the elasticity of rubber, and increase its plasticity. The process of turning elastic raw rubber into plastic rubber is called mastication. [0003] The principle of mastication is: the rubber macromolecular chain with a long chain structure is sheared by a strong mechanical shear force in the rubber ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 高剑琴刘慧娜温煜明阮振刚赵丽丽董栋
Owner BEIJING RED AVENUE INNOVA
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