Method for determining density of rubber compound or vulcanized rubber

Abstract

The present invention discloses a method for determining density of a rubber compound or a vulcanized rubber. The method comprises the following steps: a. selecting an analytical balance with accuracy of 1:10000, an acid burette or an alkali burette for common analysis use, small scissors, and distilled water or tap water with a room temperature; b, adding a certain amount of the distilled water or the tap water to the acid burette or the alkali burette, wherein the addition amount is that the liquid level reaches an appropriate position below the maximum scale of the burette until the liquid level scale can be read, and the liquid level scale is recorded as V1 ml; c, cutting a certain amount of the rubber compound sample or the vulcanized rubber sample with the small scissors, placing the cut sample on the analytical balance with accuracy of 1:10000 to weigh, wherein the weight is recorded as M g; d, pouring the weighed sample into the burette, slightly shaking the burette to remove bubbles on the surface of the sample after the sample is stabilized below the liquid level, and accurately reading the liquid level, wherein the liquid level is recorded as V2 ml; and e, calculating density of the sample.

Description

technical field [0001] The invention belongs to a test method in the field of rubber, and in particular relates to a method for measuring the density of mixed rubber or vulcanized rubber. Background technique [0002] At present, in the rubber industry, two methods are mainly used to measure the density of rubber compounds or vulcanized rubber in production. One method is to prepare a series of solutions with a density similar to that of the prepared mixed rubber or vulcanized rubber, and then take a certain amount of samples and put them into the solution to observe the state of the rubber in the solution. The density of the solution in a suspended state is the density of the solution. The density of the rubber sample; the second method is to use an analytical balance with a horizontal span to measure the mass of the sample in air and the mass in water; when the sample is completely immersed in water, its mass in water is less than that in air , the reduction in mass is eq...

AI Technical Summary

Problems solved by technology

The first method is cumbersome to operate. First, it is time-consuming and labor-intensive to prepare a series of solutions. In addition, the water in the prepared solution will volatilize with the prolongation of the parking time, which will cause experimental errors. Secondly, it is impossible to quickly obtain the experimental results by using the trial method.

This method can barely be applied to the quick detection of rubber mixture, but a series of solutions must be prepared frequently, resulting in a certain degree of waste

The second method is cumbersome to operate. In addition, the density of water is not easy to determine. In addition, the density of water will be affected by the continuous addition of samples, resulting in experimental errors.