Test device and test method for gelation curing volume shrinkage

Abstract

The invention discloses a measurement device and a test method for gelation curing volume shrinkage. The measurement device comprises a truncated cone-shaped container, a top cover, a platform and a uniform curing assembly, wherein the truncated cone-shaped container is provided with an upper opening and a lower opening, and the side wall of the truncated cone-shaped container is marked with a first volume shrinkage scale and a calibration scale of the initial addition amount of resin; the top cover is covered on the upper opening of the truncated cone-shaped container; the platform is locatedbelow the truncated cone-shaped container, the lower opening of the truncated cone-shaped container is located on the upper surface of the platform, and the truncated cone-shaped container is detachably fixed on the platform; and the uniform curing assembly is arranged below the platform to ensure that the resin added to the truncated cone-shaped container is uniformly cured. The measurement device is accurate in resin curing volume shrinkage test, can directly read the resin curing volume shrinkage, and is simple and convenient to test.

Description

technical field [0001] The invention relates to the technical field of detection of polymer materials, in particular to a test device for gelation and solidification volume shrinkage and a test method thereof. Background technique [0002] During the synthesis and preparation of polymer materials, during various curing and cross-linking reactions, the curing and cross-linking shrinkage of the material is a very important property. It is very important in material preparation and product preparation, and accurate curing volume shrinkage is required. rate measurement. [0003] Existing volume shrinkage measurement methods usually use drainage method, dilatometer measurement method and mold method. The drainage method is also the density method. This method requires precise control of the constant temperature. It is easy to cause inaccurate measurement and large measurement errors due to the weighing of the resin specimen, the air bubbles on the surface of the resin specimen, ...

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Problems solved by technology

The drainage method is also the density method. This method requires precise control and constant temperature. It is easy to cause inaccurate measurement and large measurement errors due to the weighing of the resin specimen, air bubbles on the surface of the resin specimen, and the dissolution of the resin specimen in the measurement medium.

The dilatometer measurement method is extremely sensitive to temperature, and the container causes a large measurement error

However, the mold measurement method needs to measure the volume of the mold first, and then use the density method to measure the volume of the cured resin, which is greatly affected by temperature and the test process is cumbersome.

[0004] The glass tube measurement method and the cylinder method usually used in the existing linear shrinkage measurement method are mainly used for photocurable materials. The surface tension of the photosensitive resin causes the resin to form a meniscus during the curing shrinkage process, making the measurement inaccurate; the bottom side Opaque, and the method of continuously replenishing resin or the existence of some uncured resin makes the total amount of resin before and after curing inconsistent, and cannot be calculated accurately; moreover, in order to remove the cured resin, it is in the inner wall of the glass tube or in the cylinder. The wall is coated with release agent in advance, which is troublesome to operate

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