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Polymer material having acid-base discoloration indication function, and preparation method and application thereof

A polymer material and polymer technology, which is applied in material analysis by observing the influence of chemical indicators, analysis by chemical reaction of materials, and material analysis, can solve the problem of cumbersome testing of small molecule indicators, pH value The high price of testing equipment, inconvenient maintenance and calibration, etc., achieve the effect of easy processing and application, excellent mechanical properties, and improved efficiency

Inactive Publication Date: 2017-02-22
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for the neutralization of some aqueous product systems, the potential difference pH value test equipment is expensive, maintenance and calibration are inconvenient, and the small molecule indicator test for multiple sampling is too cumbersome

Method used

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  • Polymer material having acid-base discoloration indication function, and preparation method and application thereof
  • Polymer material having acid-base discoloration indication function, and preparation method and application thereof
  • Polymer material having acid-base discoloration indication function, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of a polymer material with an acid-base discoloration indicating function, the specific preparation method is as follows:

[0030] (1) Weigh 182.0 grams of styrene monomer, 18.0 grams of acrylic acid monomer and 2.0 grams of sodium chloride and dissolve them in 1800 milliliters of water, and after heating up to 80 degrees Celsius, keep for about 10 minutes, add 2.0 grams of ammonium persulfate 200 milliliters of aqueous solution initiated polymerization. After 8 hours of polymerization, 10 milliliters of aqueous solution containing 1.0 gram of ammonium persulfate was added and the temperature was raised to 85 degrees Celsius for 30 minutes, then the reaction was stopped. The theoretical glass transition temperature of the polymer is 100.53 degrees Celsius, and it is dried at 70 degrees Celsius to obtain a powder product.

[0031] (2) Add 50 grams of magnesium sulfate heptahydrate to the emulsion in step (1) to break the emulsion, then filter the preci...

Embodiment 2

[0035] A preparation method of a polymer material with an acid-base discoloration indicating function, the specific preparation method is as follows:

[0036] (1) Weigh 182.0 grams of styrene monomer, 18.0 grams of acrylic acid monomer and 2.0 grams of sodium chloride and dissolve them in 1800 milliliters of water, and heat up to 30 degrees Celsius. 100 milliliters of aqueous solution containing 2.0 grams of ammonium persulfate and 100 milliliters of aqueous solution containing 2.0 grams of sodium ascorbate were added dropwise to the system to initiate polymerization, and the addition time was 4 hours and the reaction was continued for 1 hour. Then, 5 ml of aqueous solution containing 1.0 g of tert-butyl hydroperoxide and 5 ml of aqueous solution containing 1.0 g of sodium formaldehyde sulfoxylate were added respectively, and kept for 30 minutes, then the reaction was stopped. The theoretical glass transition temperature of the polymer is 100.53 degrees Celsius, and it is drie...

Embodiment 3

[0040] A preparation method of a polymer material with an acid-base discoloration indicating function, the specific preparation method is as follows:

[0041] (1) Dissolve 91.0 grams of styrene monomer, 91.0 grams of butyl acrylate monomer, 18.0 grams of acrylic acid monomer and 2.0 grams of sodium chloride in 1800 milliliters of water, and heat up to 80 degrees Celsius for about 10 minutes. Add 200 milliliters of aqueous solutions containing 2.0 grams of ammonium persulfate to initiate polymerization. After 8 hours of polymerization, add 10 milliliters of aqueous solutions containing 1.0 grams of ammonium persulfate and heat up to 85 degrees Celsius for 30 minutes to stop the reaction. The theoretical glass transition temperature of the polymer is 8.37 degrees Celsius, and a continuous polymer film is obtained by drying at 70 degrees Celsius. (2) Take 50 grams of the emulsion and pour it into a glass petri dish, and dry it in an oven at 70 degrees Celsius to obtain a polymer ...

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Abstract

The invention discloses a polymer material having an acid-base discoloration indication function, and a preparation method and an application thereof. The preparation method comprises the following steps: (1) carrying out a reaction of an olefin monomer I with a benzene ring and an olefin monomer II with carboxyl or anhydride groups by using polymerization of a free radical emulsion; (2) demulsifying the obtained polymer emulsion, washing with water and drying to obtain polymer particles, or directly casting and drying the polymer emulsion into a polymer thin film, fully mixing the obtained polymer particles or thin film with a sulfonating agent, and sulfonating; and (3) neutralizing the obtained sulfonated polymer particles, demulsifying, desalting and drying to obtain polymer particles having the acid-base discoloration indication function; or removing the obtained sulfonated polymer thin film, and fully washing with water, to obtain a polymer thin film having the acid-base discoloration indication function. The polymer material can be used repeatedly, has the acid-base discoloration indicator function without change, and can be processed into devices for being directly assembled on a processing container.

Description

technical field [0001] This patent relates to a polymer material with the function of acid-base discoloration indicator and its preparation method. This polymer material is composed of surface sulfonated latex particles, which can be used for many times under the condition of not being corroded, and the acid-base discoloration indicator Functionality has not changed. Background technique [0002] Acid-base indicators refer to chemical reagents that indicate changes in the acidity and alkalinity of solutions by means of color changes, generally organic weak acids or organic weak bases with complex structures. Due to their structural changes after ionization in water, their molecules and ions have different structures, thus showing different colors in different acidic and alkaline environments. [0003] At present, the acid-base indicators commonly used in laboratories are mostly small molecular substances, such as: litmus, methyl orange, methyl red, phenolphthalein, bromothy...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/06C08F220/18C08F8/36C08F2/22C08J7/12G01N21/80C08L25/14C08L33/08
CPCC08F2/22C08F8/36C08F212/08C08F220/18C08F220/1804C08J7/12C08J2325/14C08J2333/08G01N21/80G01N2021/775C08F220/06
Inventor 范欣李松栋吴跃焕
Owner TAIYUAN INST OF TECH
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