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Preparation process and detection method of microcapsule toughened and reinforced polypropylene composite material

A composite material and preparation technology, which is applied in the direction of analyzing materials, applying stable tension/pressure to test material strength, measuring devices, etc., can solve the problems of poor low temperature impact resistance, easy aging, etc., to prolong life and firmly bond the interface Effect

Active Publication Date: 2020-03-27
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes PP have good mechanical strength, corrosion resistance, and heat resistance, but it also has the disadvantages of poor low temperature impact resistance and easy aging.

Method used

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  • Preparation process and detection method of microcapsule toughened and reinforced polypropylene composite material
  • Preparation process and detection method of microcapsule toughened and reinforced polypropylene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Preparation of ST-UF microcapsules:

[0052] 1) Weigh urea and formaldehyde solution according to the mass ratio of 10:18, add the two into the flask, adjust the pH of the system to 8 with triethanolamine, then put the flask into a constant temperature water bath at 74°C, and stir for 1 hour. Obtain the capsule wall prepolymer;

[0053] 2) According to the mass ratio, weigh 100 parts of styrene, 37 parts of epoxy resin, 4 parts of acetone and 39 parts of tributyl phosphate, add them into a three-necked flask and stir well, add 188 parts of 1% dodecyl An aqueous solution of sodium alkylbenzenesulfonate, 2 parts of n-octanol, and continuous stirring at 30°C and 750 rpm for 27 minutes to form a stable oil-in-water (O / W) emulsified solution, that is, the core material emulsion;

[0054] 3) Capsule wall coated capsule core: add the capsule wall prepolymer solution prepared in 1) into the core material emulsion under stirring conditions, and adjust the pH of the system to 3 ...

Embodiment 2

[0061] Preparation of ST-UF microcapsules:

[0062] 1) Weigh the urea and formaldehyde solution according to the mass ratio of 10:21, add the two into the flask, adjust the pH of the system to 7 with triethanolamine, then put the flask into a constant temperature water bath at 73°C, and stir for 1 hour. Obtain the capsule wall prepolymer;

[0063] 2) According to the mass ratio, weigh 100 parts of styrene, 30 parts of epoxy resin, 5 parts of acetone and 38 parts of tributyl phosphate, add them into a three-necked flask and fully stir them evenly, add 185 parts of 1% dodecyl An aqueous solution of sodium alkylbenzenesulfonate, 2.5 parts of n-octanol, and continuous stirring at 30°C and 500 rpm for 26 minutes to form a stable oil-in-water (O / W) emulsified solution, that is, the core material emulsion;

[0064] 3) Capsule wall-coated capsule core: Add the capsule wall prepolymer solution prepared in 1) into the core material emulsion under stirring conditions, and adjust the pH ...

Embodiment 3

[0067] Preparation of ST-UF microcapsules:

[0068] 1) Weigh the urea and formaldehyde solution according to the mass ratio of 10:20, add the two into the flask, adjust the pH of the system to 7 with triethanolamine, then put the flask into a constant temperature water bath at 75°C, and stir for 1 hour. Obtain the capsule wall prepolymer;

[0069] 2) According to the mass ratio, weigh 100 parts of styrene, 35 parts of epoxy resin, 4 parts of acetone and 40 parts of tributyl phosphate, add them into a three-necked flask and stir well, add 190 parts of 1% dodecyl An aqueous solution of sodium alkylbenzenesulfonate, 2 parts of n-octanol, and continuous stirring at 30°C and 600 rpm for 27 minutes to form a stable oil-in-water (O / W) emulsified solution, that is, the core material emulsion;

[0070] 3) Capsule wall coated capsule core: add the capsule wall prepolymer solution prepared in 1) into the core material emulsion under stirring conditions, and adjust the pH of the system t...

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Abstract

The invention discloses a preparation process and a detection method of a microcapsule toughened and reinforced polypropylene composite material, and is characterized in that the preparation process comprises the following steps: firstly, preparing ST-UF microcapsules by taking styrene (ST) as a capsule core and urea resin (UF) as a capsule wall; then mixing a polypropylene / microcapsule compositematerial, namely adding 3-5 parts by mass of ST-UF microcapsules into every 100 parts by mass of PP powder, and mixing and granulating to obtain the polypropylene / microcapsule composite material. Thepreparation method has the advantages that the ST-UF microcapsules are introduced into the PP resin, so that the processability of PP can be remarkably improved, the preparation process of the ST-UF microcapsules is not complex, but after the ST-UF microcapsules are used for PP modification, the strength, toughness and processing fluidity of PP can be remarkably improved, and PP is endowed with certain repairability; and besides, the ST-UF microcapsules are relatively good in thermal stability and shearing resistance, can completely meet the processing condition requirements of PP materials, and do not cause adverse effects on processing and use of PP.

Description

technical field [0001] The invention belongs to the technical field of polypropylene composite material preparation, and in particular relates to a preparation process and detection method of a microcapsule toughened and reinforced polypropylene composite material. Background technique [0002] The molecular chain of polypropylene (PP) has three configurations: isotactic, syndiotactic and random. Industrial products are mainly isotactic and syndiotactic. Due to the good structural regularity of the molecular chain, PP has a high Crystallinity, and mainly exists in the form of spherulites. This makes PP have good mechanical strength, corrosion resistance, and heat resistance, but it also has the disadvantages of poor low temperature impact resistance and easy aging. Therefore, the modification of PP materials has always been an important topic in the field of PP applications. [0003] PP modification includes chemical modification and physical modification. Physical modific...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K9/10C08K5/01G01N3/08G01N5/04G01N11/14G01N15/02
CPCC08K5/01C08K9/10G01N3/08G01N5/04G01N15/02G01N11/14G01N2203/0017G01N2203/0067G01N2203/0075C08L23/12
Inventor 董金虎李新蕊张开来张文涛程敏贤贺志荣袁新强
Owner SHAANXI SCI TECH UNIV
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