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Prepreg viscosity quantitative measuring method

A test method and prepreg technology, applied in the field of testing to achieve the effect of improving the use process and improving process stability

Active Publication Date: 2018-07-06
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the composite material test methods at home and abroad, there are only qualitative (grading) test methods for prepreg viscosity, and no quantitative test methods and index systems for viscosity.

Method used

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  • Prepreg viscosity quantitative measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Quantitative viscosity test of 3238A / CF3052 medium temperature curing epoxy prepreg

[0054] 1. Test preparation

[0055] Take out the product 3238A / CF3052 medium temperature curing epoxy prepreg from the cold storage, and open the package after placing it at room temperature for at least 6 hours. Cut the prepreg sample, the size of the sample is 160mm×25mm, the width of the sample is accurate to ±0.1mm, and the length of the bonding surface is 50mm±0.5mm. The number of samples taken along the longitudinal direction of the sample is 5. Prepare a stainless steel plate (roughness Ra<1.6um), the size of the stainless steel is 160mm×25mm, and the quantity is 5 pieces.

[0056] 2. Test conditions (environment)

[0057] The sample needs to be adjusted and tested under the condition that the ambient temperature reaches 23°C±2°C and the relative humidity is not greater than 65%.

[0058] 3. Test procedure (test steps)

[0059] Before the test, lap the cut single-layer prep...

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PUM

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Abstract

The invention belongs to the field of detection technology, and relates to a quantitative measuring method of the physical property viscosity of an intermediate product prepreg of a moulded compositematerial, and especially relates to a prepreg viscosity quantitative measuring method. According to the prepreg viscosity quantitative measuring method, at least five samples with the sample materialof a product to be tested are prepared, test temperature is controlled to be 23+-2 DEG C, the relative humidity is controlled to be 65% or lower, a tensile testing machine is adopted for tension-sheartest. The quantitative measuring method is capable of controlling the viscosity of prepreg preferably, and improving pregreg using technology. Prepreg viscosity quantification test, test parameter selection and optimization, and forming of a prepreg viscosity quantitative measuring method are realized through a large amount of research studies and argumentation, prepreg viscosity fixed value control is realized through prepreg paving technology adaptability verification, and prepreg technology stability is increased.

Description

technical field [0001] The invention belongs to the technical field of detection, and relates to a method for quantitatively testing the viscosity of one of the physical properties of prepreg, an intermediate product of molding composite materials, in particular to a method for quantitatively testing the viscosity of prepreg. Background technique [0002] The laying process of prepreg is a key factor to determine whether the prepreg is suitable for manufacturing composite components, and the viscosity of the prepreg should be within an appropriate range. Viscosity is a basic physical property of prepregs used in resin matrix composites. However, both the theoretical understanding of viscosities and the establishment of viscosity quantitative test methods in practical applications to characterize the viscosities of prepregs are still in the early stages of research. . In the application of prepreg, there is still the situation that the viscosity of prepreg is not ideal, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04G01N3/24
CPCG01N3/24G01N19/04
Inventor 王洁宇朱凯沈超
Owner AVIC COMPOSITES
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