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Polymer material for seismic physical model and its prepn

A technology of earthquake physics and synthetic materials, applied in teaching models, educational appliances, instruments, etc., can solve the problems of large ultrasonic attenuation, poor repeatability, and difficult to control wave velocity, and achieve small wave velocity changes with time, stable performance, and stable wave velocity. Effect

Inactive Publication Date: 2006-05-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some seismic physical model materials use inorganic cementitious materials such as cement and gypsum, and fillers such as corundum powder, calcium carbonate powder, and talc powder are added to make model materials with different wave velocities. With the growth of age, its wave speed has been changing, the wave speed is difficult to control, the attenuation of ultrasonic waves is also large and the repeatability is poor, which limits the use of this material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Epoxy resin E-51 100

[0048] Hardener 25

[0049] Dioctyl phthalate 12

[0050] Benzyl glycidyl ether 921 10

[0051] Coupling agent KH-570 0.5

[0052] Talc powder 10

[0053] The above are calculated in parts by weight.

[0054]Weigh the required epoxy resin, plasticizer, curing agent, diluent, coupling agent and filler according to the above weight ratio, pour the epoxy resin into the container, add the plasticizer and diluent, and stir for 3 minutes , then add curing agent, stir for 3 minutes, finally add coupling agent and filler, stir for 3 minutes, then put the container in a sealed box and vacuumize to remove the air bubbles in the model material, the vacuum pressure is controlled at 50-150kPa, the vacuum time Control it for 15-30 minutes; pour the degassed model material into the prefabricated mold, and cure it with the mold at 20°C for 7 days, and remove the mold to obtain the required earthquake physical model. The longitudinal wave velocity Vp of the ...

Embodiment 2

[0056] Phenyl ether RTV silicone rubber 100

[0057] Orthoethyl silicate 3

[0058] Tin octoate 0.05

[0059] The above are calculated in parts by weight.

[0060] Weigh the required silicone rubber, cross-linking agent and accelerator according to the above weight ratio, pour the silicone rubber into the container, add the cross-linking agent and accelerator, stir for 5 minutes, then put the container into a sealed box for vacuuming Eliminate the air bubbles in the model material, control the vacuum pressure at 50-150kPa, and control the vacuuming time at 15-30 minutes; pour the debubbled model material into the pre-made mold, and maintain it with the mold at a temperature of 15-25°C After 5-9 days, the formwork is removed and the required earthquake physical model is obtained. The longitudinal wave velocity Vp of the obtained model material was tested to be 1010 (m / s).

Embodiment 3

[0062] A component:

[0063] Epoxy resin E-51 100

[0064] Polyamide resin 650 75

[0065] Dibutyl phthalate 15

[0066] Propylene oxide phenyl ether 690 10

[0067] B component:

[0068] Phenyl RTV Silicone Rubber 100

[0069] Butyl titanate 2.5

[0070] Dibutyltin dilaurate 0.1

[0071] A component: B component = 80:20

[0072] The above are calculated in parts by weight.

[0073] Component A: Weigh the required epoxy resin, plasticizer, curing agent and diluent according to the above weight ratio, pour the epoxy resin into the container, add the plasticizer and diluent, stir for 5 minutes, and then Add curing agent and stir for 4 minutes;

[0074] Component B: Weigh the required silicone rubber, cross-linking agent and accelerator according to the weight ratio, pour the silicone rubber into the container, add the cross-linking agent and accelerator, and stir for 6 minutes;

[0075] The two components A and B are mixed in a container according to the weight ratio, ...

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PUM

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Abstract

The present invention belongs to the field of high molecular material technology, and is especially one kind of polymer material for seismic physical model and its preparation process. The polymer material consists of epoxy resin mixture comprising epoxy resin and assistant and silicone rubber mixture comprising silicone rubber and assistant in the weight ratio of 0-100. The polymer material is prepared through preparing epoxy resin mixture and silicone rubber mixture separately, mixing these two components in certain weight ratio inside some container via stirring to obtain model material, setting the container inside sealed box to vacuum pump for eliminating bubble, molding, curing inside the mold at 15-25 deg.c for 5-9 days, and demolding to obtain the seismic physical model. The model material has longitudinal wave speed regulating range of 1000-2850 m / s.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polymer composite material used for an earthquake physical model and a preparation method thereof. Background technique [0002] The geophysical model test is to make the physical prototype of the medium body follow the physical and geometric similarity rules, according to a certain scale factor, build a similar model in the laboratory, observe the characteristics of the geophysical field, and test the known and ideal conditions. The observation of the geophysical field in the simplified model establishes the model structure, structure, physical properties and their changing laws of the medium and the characteristics of the geophysical field and the relationship between them. Therefore, geophysical model experiments will directly or indirectly serve geological-geophysical investigations, detection of energy and mineral resources, seismology and earthquake ...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K3/36C08K5/10C08K5/57C08L83/04G09B25/00
Inventor 杨钱荣李国治朱蓓蓉董良国杨全兵张树青
Owner TONGJI UNIV
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