Method for testing resin curing shrinkage volume and fiber-resin contact angle

A technology of resin curing and testing method, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as easy generation of pores and decline in mechanical properties of composite materials, and achieve the effects of wide application, simple testing device, and high testing accuracy.

Pending Publication Date: 2021-04-16
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

If the wettability is poor, pores are easily generated during the molding process,

Method used

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  • Method for testing resin curing shrinkage volume and fiber-resin contact angle
  • Method for testing resin curing shrinkage volume and fiber-resin contact angle

Examples

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Embodiment 1

[0034] A method for measuring volume change of chemical shrinkage and fiber-resin contact angle during resin curing process, the main test steps are as follows:

[0035] (1) First, mix a sufficient amount of the resin curing system to be tested (i.e. sample 6) uniformly in proportion, vacuumize and defoam for 15 minutes, use it to fill the sample bottle 5 with precise scale, set equal weight without adding curing agent The resin filled with another identical sample bottle 5 is used as a control group, and the capacity of two groups of sample bottles is 125ml;

[0036] (2) Clean and dry the pipette. In this example, the selected pipette 1 has a range of 1ml and an accuracy of 0.01ml. The pipette 1 and the temperature sensor 2 are installed together on the rubber stopper 3, and the rubber stopper 3 is plugged on the sample bottle filled with resin to check its tightness, and the bottle body is fixed with the test tube clamp 4, while ensuring that the pipette 1 remains Vertical ...

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Abstract

The invention provides a method for testing resin curing shrinkage volume and fiber-resin contact angle, which comprises the following steps of: 1, uniformly mixing a resin curing system to be tested according to a proportion, vacuumizing, filling a sample bottle with accurate scales, filling another same sample bottle with resin with equal weight and without a curing agent as a control group, 2, fixing pipettes and a temperature sensor at the bottleneck of a sample bottle through a rubber plug, 3, adjusting the height of a liquid column in the pipettes, and respectively putting two same fiber bundles into the two pipettes, 4, heating the sample at the moment when the fiber bundles contact the liquid level, and timing, respectively making reaction time-volume change curve graphs of the group to be detected and the control group; observing and shooting the fiber-resin infiltration angle. According to the method, the resin curing shrinkage volume and the change of the fiber-resin contact angle in the curing process can be obtained at the same time through one experiment, and compared with a traditional testing method, the testing device is simple, and the testing precision is high.

Description

technical field [0001] The invention belongs to the technical field of thermosetting resin curing volume change characteristics and fiber-resin contact angle research, in particular to a method for testing resin curing shrinkage volume and fiber-resin contact angle. Background technique [0002] Due to the advantages of excellent specific strength, specific stiffness, corrosion resistance and structural designability, polymer-based composite materials are widely used in shipbuilding, aerospace, wind power and other fields. In the molding process of composite materials, the change of resin curing behavior has a decisive impact on the residual stress of the product after curing under the condition of certain mold materials, which will greatly reduce the performance of the product. [0003] Thermal shrinkage is caused by temperature changes inside the product during resin curing, while chemical shrinkage is caused by the release of small molecules and crosslinking reactions dur...

Claims

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Application Information

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IPC IPC(8): G01N13/00
Inventor 宋金鹏杨勇王继辉杨斌
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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