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Method for testing swelling degree of solid powdery polymer composite material

A technology of solid powder and composite materials, which is applied in the direction of absorption and weighing of substances, which can solve the problems of unclear solvent types, test procedures and methods, poor applicability, and inability to apply powder PI swelling degree test, etc., to improve the test efficiency. , Good impregnation degree, stable test data

Pending Publication Date: 2022-08-05
ZHONGFU SHENYING CARBON FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For polymer composite materials whose appearance is solid powder, the general swelling test method has the problems of specificity and poor applicability, including defects such as solvent type, test procedure and method are not clear
Document 1 (Yang Libin, Sun Benhui, Xu Yexin, et al. Swelling characteristics of polyimide membranes in different alcohol / water systems [J]. Membrane Science and Technology, 2008 (02): 44-47.) studied different alcohol concentrations The influence on the swelling characteristics of polyimide (PI) membrane, but the main body of the swelling degree test material used is PI homogeneous membrane, this method cannot be applied to the swelling degree test of powder PI
Chinese patent application 201710106267.2 discloses a method for detecting the swelling degree of solid powder. The solid powder of the test object is swollen in an ultrafiltration centrifuge tube, and then the free water in the swollen product is removed by centrifugation. The swelling degree of the test substance can be obtained by weight calculation, but it is only applicable to the swelling degree detection of polymer carbonates such as sevelamer, sevelamer carbonate, sevelamer hydrochloride and other raw materials and preparations

Method used

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  • Method for testing swelling degree of solid powdery polymer composite material
  • Method for testing swelling degree of solid powdery polymer composite material
  • Method for testing swelling degree of solid powdery polymer composite material

Examples

Experimental program
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Embodiment 1

[0026] (1) The temperature of the upper and lower heating plates of the pressure forming machine is set to 290 ° C, the mold is placed in the predetermined position of the pressure forming machine, and the heater is turned on to preheat for 30 minutes;

[0027] (2) Evenly coat the silicone mold release agent on the surface of the mold, weigh 38.5g of the solid powder sample of polymer composite material whose main component is more than 95% polyamide, place it on the lower mold, put it on the mold after leveling, and adjust the pressure Press for 4Mpa, release the pressure within 40s, and let it stand for 8min;

[0028] (3) Transfer the mold to a cold press, press with a pressure of 14Mpa, cool down to 90°C, and take out the tablet molding sample;

[0029] (4) The obtained 80*80mm sample sheet is cut into 10*10mm square slices, and smoothed with an abrasive tool, and the slice weight is W1=4.6g;

[0030] (5) wrap the slices in a cloth bag, put them into a Soxhlet extractor, a...

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Abstract

The invention discloses a method for testing the swelling degree of a solid powdery polymer composite material. The method comprises the following steps: firstly, carrying out compression molding on a solid powdery polymer composite material, cutting into square slices, polishing to be flat by using a grinding tool, then packaging the slices by using a cloth bag, putting into a Soxhlet extractor, adding methyl ethyl ketone, carrying out reflux impregnation, and calculating the swelling degree according to the weight before and after impregnation. The method disclosed by the invention is relatively high in repeatability and stability, stable in test data, capable of better characterizing the impregnation degree of the test sample on methyl ethyl ketone, and suitable for a high-molecular polymer composite material of which the main component is more than 95% of polyamide, polyurethane, polyimide and the like.

Description

technical field [0001] The invention belongs to the technical field of performance detection of polymer composite materials, and relates to a method for testing the swelling degree of solid powder polymer composite materials. Background technique [0002] Polymer composite materials are mainly divided into polymer structural composite materials and polymer functional composite materials. The polymer structure composite material consists of two parts, one is the reinforcing material, which is a fiber and fabric with high strength, high modulus and temperature resistance, such as glass fiber, silicon nitride whisker and other fiber fabric; the other is the matrix material , Mainly adhesives that play a role in bonding, such as unsaturated polyester resin, epoxy resin, phenolic resin, polyimide and other thermosetting resins and styrene, polypropylene and other thermoplastic resins. Structural materials are divided into polymer matrix composites, metal matrix composites, carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 陈秋飞郭鹏宗张贺平孟强郑皓宇范宝琳储传民
Owner ZHONGFU SHENYING CARBON FIBER
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