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Gel temperature testing method for polyvinyl chloride paste resin

A polyvinyl chloride paste and gel temperature technology, which is applied in the preparation of test samples, measuring devices, sampling, etc., to achieve the effect of eliminating the influence of human factors, reliable results and simple operation

Pending Publication Date: 2021-02-12
SHENYANG CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two methods use time to indirectly characterize the speed of the gelation speed and the height of the gelation temperature, neither of which is tested from the gelation temperature

Method used

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  • Gel temperature testing method for polyvinyl chloride paste resin
  • Gel temperature testing method for polyvinyl chloride paste resin
  • Gel temperature testing method for polyvinyl chloride paste resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of gel temperature test method for polyvinyl chloride paste resin, comprises the steps:

[0034] S100, testing the viscosity of the polyvinyl chloride paste resin under heating at a fixed heating rate, and obtaining a corresponding viscosity-temperature curve;

[0035] S200. Determine the tangent of two sharply changing curve segments on the viscosity-temperature curve;

[0036] S300. Determine the temperature corresponding to the intersection point of the two tangent lines as the gel temperature of the polyvinyl chloride paste resin;

[0037] Among them, the polyvinyl chloride paste resin is PSH-10 resin powder.

[0038] By determining the tangent of two sharply changing curve segments on the viscosity-temperature curve corresponding to the polyvinyl chloride paste resin heated at a fixed heating rate, and then determining the temperature corresponding to the intersection of the two tangents as polyvinyl chloride paste resin The gel temperature of vinyl chlori...

Embodiment 2

[0053] The difference between this embodiment and the gel temperature test method for polyvinyl chloride paste resin in embodiment 1 is that the polyvinyl chloride paste resin in this embodiment is PSM-31 resin powder.

[0054] figure 2It is the viscosity-temperature curve of PSM-31 resin powder. By determining the tangent of the two sharply changing curves on the viscosity-temperature curve, it can be concluded that the gel temperature of PSM-31 resin powder is 87.3°C .

Embodiment 3

[0056] The difference between this embodiment and the gel temperature test method for polyvinyl chloride paste resin in embodiment 1 is that the polyvinyl chloride paste resin in this embodiment is PSL-31 resin powder.

[0057] image 3 It is the viscosity-temperature curve of PSL-31 resin powder. By determining the tangent of the two sharply changing curves on the viscosity-temperature curve, it can be concluded that the gel temperature of PSL-31 resin powder is 83.9°C .

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Abstract

The invention discloses a gel temperature testing method for polyvinyl chloride paste resin. The method comprises the following steps of: determining tangent lines of two curve sections which sharplychange on a viscosity-temperature curve graph corresponding to polyvinyl chloride paste resin heated at a fixed heating rate; and determining the temperature corresponding to the intersection point ofthe two tangent lines as the gel temperature of the polyvinyl chloride paste resin. The polyvinyl chloride paste resin gel temperature test method provided by the invention has the advantages of simple operation, reliable result, stable test process, elimination of influence of human factors and the like, and further provides a convenient and credible test means for research and development departments and paste resin downstream manufacturers.

Description

technical field [0001] The invention relates to the technical field of performance testing of polyvinyl chloride paste resins, in particular to a method for testing the gel temperature of polyvinyl chloride paste resins. Background technique [0002] Polyvinyl chloride paste resin is one of the varieties of polyvinyl chloride resin, which needs to be mixed with plasticizer to form plastisol paste for application. At present, the main polyvinyl chloride paste resin production processes include micro-suspension method and emulsion method, and the particle size range is generally 0.1-2.0 μm. PVC paste resin is mainly used in soft products such as artificial leather, floor leather, toys, wallpaper, and automotive interior materials. [0003] Because, in the molding process of paste resin, the plasticized paste has to go through a plasticizing process from gel to melting under conditions such as stress and heat. The gel temperature refers to the temperature when the resin parti...

Claims

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Application Information

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IPC IPC(8): G01N11/00G01N25/02G01N1/28G01N1/38
CPCG01N11/00G01N25/02G01N1/286G01N1/38G01N2001/2866
Inventor 曹爱军郭月
Owner SHENYANG CHEM IND CO LTD
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