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

A test method and test device technology, which is applied in the indirect test of temperature relationship, polymer pressure, and specific volume, and can solve the problems of mercury in the test medium, which is poisonous and volatile.

Active Publication Date: 2010-08-11
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

Method used

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

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Embodiment Construction

[0023] As shown in Figure 1, the test device of the present invention consists 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 consists of two chambers. The lower cavity has sufficient storage space for the pressure transmission medium mercury 17 and the sealing liquid 16 for sealing the mercury. Drill an outlet hole 13 on one side of the upper cavity, and connect the outlet pipe 11 outside, and the opening and closing of the outlet hole 13 is controlled by a switch valve 12 . A thin spacer is welded at the steps of the upper chamber and the lower chamber as the lower spacer 5, and the piece is full of small holes, which are used to hold the sample to be tested and allow the liquid to pass through; after the sample is put in, t...

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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 affecting 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 the pressure, specific volume and temperature of the polymer, that is, the relationship between P-V-T, provides a basis for setting the parameters of the injection molding process and analyzing the causes of defects such as warpage, shrinkage, and bubble defects during product processing. [0003] Polymer P-V-T tester is an instrument used to measure the functional relationship between polymer specific volume and pressure, specific volume and temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(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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