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A system for evaluating the environmental stress resistance performance of polyethylene resin and its application

A technology that is resistant to environmental stress and polyethylene resin, applied in the direction of material inspection products, etc., can solve the problems of long test period, inability to complete the test, hazards, etc., and achieve the effect of shortening the test period, long test period, and shortening the test period

Active Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, nonylphenol (NP) can continuously accumulate in organisms through the food chain. Studies have shown that even if the concentration of the emission is very low, it is extremely harmful.
Therefore, using NPE as a surfactant to evaluate the environmental stress cracking resistance of polyethylene is not only harmful to the environment, but also endangers the health of testers.
On the other hand, the important direction of polyethylene resin modification is to improve its environmental stress cracking resistance. The test cycle of using NPE as a surfactant is very long, and even the test cannot be completed within the validity period of the solution.
[0004] Therefore, the use of NPE to evaluate the environmental stress resistance of polyethylene resin is not enough to meet the test needs, and a new surfactant system needs to be developed

Method used

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  • A system for evaluating the environmental stress resistance performance of polyethylene resin and its application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Use pareth-3, wherein the number of carbon atoms of the alkane chain segment is 11, and sodium lauryl sulfate forms a compound system, and the mass fraction ratio of pareth-3 and sodium lauryl sulfate is 100:0.01, the concentration of the aqueous solution is 10%. The ESCR test was carried out on the sample sample using the compound surfactant.

Embodiment 2

[0029] Use pareth-3, wherein the number of carbon atoms of the alkane chain segment is 13, and sodium lauryl sulfate forms a complex system, and the mass fraction ratio of pareth-3 and sodium lauryl sulfate is 100:0.01, the concentration mass ratio of the aqueous solution is 5%. The ESCR test was carried out on the sample sample using the compound surfactant.

Embodiment 3

[0031] Use pareth-3, wherein the number of carbon atoms of the alkane chain segment is 11, and sodium lauryl sulfate forms a compound system, and the mass fraction ratio of pareth-3 and sodium lauryl sulfate is 100:0.01, the concentration of the aqueous solution is 0.5%. The ESCR test was carried out on the sample sample using the compound surfactant.

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Abstract

The present invention relates to a system for evaluating the environmental stress cracking resistance of a polyethylene resin, wherein the system comprises the aqueous solution of a nonionic surfactant and an anionic surfactant, and further has the following advantages that 1) the electrostatic stability of the mixed surfactant is improved to make the active agent molecular chain easily form micelles so as to provide a synergistic effect and substantially improve the efficiency of the surfactant; and 2) the surfactant component cannot release nonylphenol and other components toxic and harmful for human body during the use process, such that the advantages of safety and environmental protection are provided.

Description

technical field [0001] The invention relates to a system for evaluating the environmental stress cracking resistance of polyethylene resin. Background technique [0002] Polyethylene resin is one of the most important chemical products and is widely used in the production of plastic products such as pipes, hollow products, sheets, and films. Polyethylene will crack under the synergistic effect of environmental factors and stress, which is commonly referred to as environmental stress cracking, so plastic products need to evaluate their environmental stress cracking resistance during use. [0003] At present, a variety of methods for evaluating the environmental stress cracking resistance of polyethylene resin and its products have been formed at home and abroad, and have been incorporated into the standard system. ASTM D 1693 (American Society for Testing and Materials (ASTM) standard): 2008 stipulates the standard test method for environmental stress cracking of ethylene pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/44
Inventor 杨化浩者东梅刘玉春
Owner CHINA PETROLEUM & CHEM CORP
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