Compressing model sample disc for dynamic thermal mechanical analyzer

A dynamic thermomechanical and sample disk technology, applied in the investigation stage/state change, etc., can solve the problems of small sample contact area, large sample cell diameter, large measurement error, etc., and achieve the effect of simple structure, low cost, and easy production

Inactive Publication Date: 2014-04-30
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional DMA compression mode probe is only suitable for measuring sheet-shaped samples with high elasticity, while the traditional needle penetration mode probe has a small contact area with the sample and a large sample cell diameter. When testing powdery samples, only local samples are stressed. large error

Method used

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  • Compressing model sample disc for dynamic thermal mechanical analyzer
  • Compressing model sample disc for dynamic thermal mechanical analyzer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Design and manufacture the sample tray, the inner diameter of the disc is 5.0mm, the thickness is 0.5mm, and the height of the inner wall is 3.0mm; the supporting design of the tray cover is 4.5mm in diameter, and the thickness is 0.2mm; the sample tray and the cover are made of brass material, The allowable tolerance is ±0.05mm.

Embodiment 2

[0017] Design and manufacture the sample tray, the inner diameter of the disc is 8.0mm, the thickness is 1.5mm, and the height of the inner wall is 5.0mm; the supporting design of the tray cover is 7.5mm in diameter, and the thickness is 1.0mm; the sample tray and the cover are made of brass material, The allowable tolerance is ±0.05mm.

Embodiment 3

[0019] Design and manufacture the sample tray, the inner diameter of the disc is 6.0mm, the thickness is 1.0mm, and the height of the inner wall is 4.0mm; the supporting design of the tray cover is 5.5mm in diameter, and the thickness is 0.5mm; the sample tray and the cover are made of brass material, The allowable tolerance is ±0.05mm.

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Abstract

The invention relates to a compressing model sample disc for a dynamic thermal mechanical analyzer. The sample disc is filled with an amorphous state powder polymer sample and combines a needle model probe of the dynamic thermal mechanical analyzer to measure the glass-transition temperature of the sample. The sample disc is characterized in that the cross section of a groove disc is a round, the vertical section of the sample disc is of a U shape, the inner diameter of the groove disc is 5.0-8.0mm, the thickness of the groove disc is 0.5-1.5mm, and the height of the groove disc is 2.0-5.0mm. A cover of the compressing model sample disc provided by the invention is characterized by being matched to design with the sample disc, wherein the sample cover is a round slice, the diameter of the sample cover is slightly less than the inner diameter of the sample disc, the sample cover is embedded into the disc and fully covers a powder sample, and the thickness of the sample cover is 0.2-1.5mm.

Description

technical field [0001] The invention relates to an instrument testing technology, in particular to a compression mode sample disk for a dynamic thermomechanical analyzer (DMA) used for detecting the glass transition temperature of an amorphous powder polymer. The sample plate is easy to obtain materials, simple to manufacture, less sample amount, and the plate body is not easy to deform as the test temperature rises. At the same time, the measurement method combined with the probe of the needle penetration mode to simulate the compression mode can accurately obtain the glass of the amorphous powder polymer. Transition temperature (Tg) or softening point. It is especially suitable for the detection of polymers with high Tg, or samples with high and high scores that are easy to decompose after conventional differential scanning calorimetry detection, or polymer samples with insensitive detection effects. Background technique [0002] Amorphous powder polymers, such as starch,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/12
Inventor 付维贵费睦融梅淑贞刘珊珊林贵德吴春辉吴世臻陈莉
Owner TIANJIN POLYTECHNIC UNIV
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