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Polymer pressure-specific volume-temperature relation indirect test method and its device

A test method and a test device technology, applied in the direction of material inspection products, etc., can solve the problems of mercury in the test medium, which is poisonous and volatile

Active Publication Date: 2008-03-26
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method and device that can be used to test the relationship between polymer pressure-specific volume-temperature. The present invention can solve the problem that the test medium mercury is poisonous and volatile, and still adopts plunger pressurization to obtain a A Simple and Effective Method for Indirect Testing of Polymer P-V-T Parameters

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  • Polymer pressure-specific volume-temperature relation indirect test method and its device

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Embodiment Construction

[0023] The test device of the present invention is shown in Figure 1, consisting of pressure transmission medium mercury 17, sealing liquid 16, sample chamber, pressure vessel 3, pressurization system, heating and cooling system, pressure sensor 9, displacement sensor, thermocouple 14 and data processing System composition. Inside the pressure vessel 3 is a sample chamber, which is composed of two chambers. The lower cavity leaves enough storage space for the pressure transmission medium mercury 17 and the sealing liquid 16 for sealing the mercury. An outlet hole 13 is drilled on one side of the upper cavity, and an outlet pipe 11 is connected to the outside. The opening and closing of the outlet hole 13 is controlled by a switch valve 12. A thin spacer is welded on the steps of the upper cavity and the lower cavity as the lower spacer 5, which is filled with small holes, which is used to carry the sample to be tested and allow the liquid to pass through; It is necessary to have a...

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Abstract

A kind of method and equipment test the relation of polymer pressure, specific volume, temperature indirectly, uses the test equipment which is compose of the pressure medium mercury, seal liquid, sample room, pressure vessel, compression system, heat and cold system, pressure sensor, displacement sensor, thermoelectric couple and data processing system. This method using the character that the mercury and the seal liquid do not dissolve in each other, it can avoid the disadvantage that the mercury is toxic and is easy to volatilize in the indirect method of the polymer P-V-T test simply, at the same time, it has a series other merits such as can make the inner to reach high vacuum degree, to make the sample stress uniformly, the compress coefficient is small, impress pressure is direct, the measure precision is high and so on, it also resolves the problem that it vent the air in the presence of vacuum. It can use the relation of the polymer pressure-specific volume-temperature sets the mold technology parameter of the polymer product or design the module and do CAE analysis.

Description

Technical field [0001] The invention relates to an indirect test method and device for the relationship between polymer pressure (P), specific volume (V) and temperature (T), and belongs to the technical field of material testing. Background technique [0002] Pressure, temperature, and time are the main factors that affect the polymer injection molding process. In the case of certain polymer raw materials and mold structure, injection molding process parameters have a direct impact on product quality. The relationship between pressure, specific volume, and temperature of the polymer, that is, the relationship between P-V-T, provides the basis for the parameter setting of the injection molding process and the analysis of the causes of defects such as warpage, shrinkage, and bubble defects during product processing. [0003] The polymer P-V-T tester is an instrument used to determine the functional relationship between polymer specific volume and pressure, and specific volume and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/44
Inventor 杨卫民王建丁玉梅
Owner BEIJING UNIV OF CHEM TECH
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