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Qualitative and quantitative method of antioxidant in polyolefin

A technology of antioxidants and polyolefins, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of unquantitative detection and analysis, no analysis methods, etc., and achieve the effects of improved solubility, improved sensitivity, and accurate test results

Active Publication Date: 2018-06-05
上海微谱检测科技集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the amount of additives added in the production of domestic plastic factories is only based on existing domestic or foreign formulas, or mixed based on experience. Due to the lack of suitable analysis methods and means, the mixing degree and content of additives in products have never been tested. Quantitative detection and analysis. With the gradual development of the market economy today, effective quantitative control of the entire production process has become an urgent research topic that enterprises must solve.

Method used

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  • Qualitative and quantitative method of antioxidant in polyolefin
  • Qualitative and quantitative method of antioxidant in polyolefin

Examples

Experimental program
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Effect test

Embodiment 1

[0077] Embodiment 1 provides the quantitative test method of antioxidant in polyolefin, comprises the steps:

[0078] Get 10g containing 0.5wt% antioxidant 1010, 0.5wt% antioxidant 168, 0.2wt% antioxidant 1076, and 0.3wt% BHT, isotactic polypropylene with a number average molecular weight of 150,000, press into thin sheets, and use Freeze with liquid nitrogen, crush with a grinder, add 150ml of chloroform, stir and dissolve at 70°C for 8 hours, then add 0.120g of anhydrous aluminum trichloride under stirring, adjust the temperature to 60°C, and add 0.075g of formazan dropwise at a uniform speed Aminosulfonyl chloride (CAS No. 10438-96-7, purchased from Wuhan Combeide Biotechnology Co., Ltd.), the dropwise addition was completed within 15 minutes and the temperature of the system was controlled at 60-65°C. React for 5 hours, then cool the reaction liquid to 25°C, filter, wash the filter residue with chloroform, combine the washing liquid with the filtered clear liquid, and add ...

Embodiment 2

[0082] Embodiment 2 provides the quantitative testing method of antioxidant in polyolefin, comprises the steps:

[0083] Get 10g containing 0.5wt% antioxidant 1010, 0.5wt% antioxidant 168, 0.2wt% antioxidant 1076, and 0.3wt% BHT, isotactic polypropylene with a number average molecular weight of 150,000, press into thin sheets, and use Freeze with liquid nitrogen, crush with a pulverizer, add 150ml of chloroform, stir and dissolve at 70°C for 8 hours, then add 0.200g of anhydrous aluminum trichloride under stirring, adjust the temperature to 60°C, and add 0.075g of formazan dropwise at a uniform speed Aminosulfonyl chloride (CAS No. 10438-96-7, purchased from Wuhan Combeide Biotechnology Co., Ltd.), the dropwise addition was completed within 15 minutes and the temperature of the system was controlled at 60-65°C. React for 5 hours, then cool the reaction liquid to 25°C, filter, wash the filter residue with chloroform, combine the washing liquid with the filtered clear liquid, an...

Embodiment 3

[0087] Embodiment 3 provides the quantitative testing method of antioxidant in polyolefin, comprises the steps:

[0088]Get 10g containing 0.5wt% antioxidant 1010, 0.5wt% antioxidant 168, 0.2wt% antioxidant 1076, and 0.3wt% BHT, isotactic polypropylene with a number average molecular weight of 150,000, press into thin sheets, and use Freeze with liquid nitrogen, crush with a pulverizer, add 150ml of chloroform, stir and dissolve at 70°C for 8 hours, then add 0.170g of anhydrous aluminum chloride under stirring, adjust the temperature to 60°C, and add 0.043g of milk dropwise at a constant speed Acid anhydride, the dropwise addition is completed within 15 minutes and the temperature of the system is controlled at 60-65°C. After the dropwise addition, it is reacted at 65°C for 5 hours, and then the reaction solution is cooled to 25°C, filtered, and the filter residue is washed with chloroform. The washing liquid Combine with the filtered clear liquid, and add 70ml of glacial hydr...

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Abstract

The invention relates to a method for separating and detecting additives in high-molecular polymers, and particularly relates to a qualitative and quantitative method of an antioxidant in polyolefins.The method comprises the following steps: pressing a to-be-detected sample into flakes, and grinding; adding an organic solvent, stirring and dissolving at 60-90 DEG C for 3-8 hours; adjusting the system temperature to be 60-70 DEG C, adding a substitute reagent and a catalyst under a stirring state to react for 2-5 hours, cooling to 25 DEG C, filtering, adjusting the pH value of filtrate, and separating out an organic phase; and separating the organic phase, concentrating to fix the volume, and performing quantitative analysis.

Description

technical field [0001] The invention relates to a separation and detection method for additives in high molecular polymers, in particular to a qualitative and quantitative method for antioxidants in polyolefins. Background technique [0002] It is well known that polyolefins are relatively stable even when heated to higher temperatures in the absence of oxygen. However, polyolefins are inevitably aged by heat, light, oxygen, heavy metal ions or mechanical shearing during preparation, processing and application, resulting in product degradation, discoloration and decline in physical and mechanical properties, until the loss of commodity value and practical value . Therefore, it is an important subject to study the anti-oxidation of polyolefins in its stabilization. From a chemical point of view, some parts of the polyolefin molecule have some weak bonds, and these weak chemical bonds naturally become the breakthrough point of the chemical reaction, starting from the chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06
CPCG01N30/06G01N2030/067
Inventor 李伟秦秋明吴杰贾梦虹托合提麦麦提·艾拜杜拉
Owner 上海微谱检测科技集团股份有限公司
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