GB/T 30794-2014Determination of polyvinylidene fluoride (PVDF) content of hot-melt fluorocarbon resin coatings (dry film)—Dropping of the melting temperature (English PDF)

1 Scope

This standard specifies the determination of PVDF content in coatings (dry film) after coating of hot melt fluororesin coatings by melting temperature drop method.

Principles, test procedures, results calculations and representations.

This standard applies to the test of PVDF content in hot melt fluororesin coating (dry film) with PVDF content of not less than 50%.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 19466.1 Plastic Differential Scanning Calorimetry (DSC) - Part 1. General

Plastics - Differential scanning calorimetry (DSC) - Part 3. Determination of melting and crystallization temperature and enthalpy

3 Terms and definitions

The following terms and definitions apply to this document.

4 Principle

According to the compatible polymer blend system, the melting temperature of the crystalline polymer increases with the content of the non-crystalline polymer compatible therewith.

And the phenomenon of decline, using a differential scanning calorimeter (DSC) to measure pure PVDF resin, standard samples of different PVDF content and

Measuring the melting temperature of the sample coating, melting the PVDF content of the standard sample to the standard sample of different PVDF content and the pure PVDF resin

The temperature difference is plotted, and the melting temperature difference between the coating of the sample to be tested and the pure PVDF resin from which the coating is prepared can be obtained by looking up the curve.

The content of PVDF in the resin coated.

5 Instruments and materials