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Modified scrap rubber powder as well as preparation method and application thereof

A waste rubber powder and modification technology, which is applied in recycling technology, plastic recycling, etc., can solve the problems of pollution promotion and use, limited modification effect, complicated process, etc., and achieve simplified process and equipment, reduced material cost, and excellent performance Effect

Active Publication Date: 2015-11-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, mechanochemical and polymer coating modification have limited modification effects due to the inert surface of waste rubber powder, while other modification methods have been promoted in industry due to the complexity of the process, the need to add monomers or solvents, and pollution to the environment. limited use

Method used

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  • Modified scrap rubber powder as well as preparation method and application thereof
  • Modified scrap rubber powder as well as preparation method and application thereof
  • Modified scrap rubber powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of modified waste rubber powder, specifically comprising the following steps:

[0038] (1) masticating 100 parts by mass of waste rubber powder and 1 part by mass of peptizer 2,2'-dibenzamidodiphenyl disulfide at 180°C for 2 minutes to obtain activated rubber powder;

[0039] (2) Mix 10 parts by mass of coupling agent KH900 with 100 parts by mass of epoxidized natural rubber (epoxy degree is 20) at 100° C. for 5 minutes to obtain a modifier;

[0040] (3) Add 10 parts by mass of modifier to 100 parts by mass of activated rubber powder, mix at 120° C. for 5 minutes, and obtain modified waste rubber powder after cooling. The structural characterization of the modified waste rubber powder is as follows: figure 2 shown. The structural characterization of unmodified waste rubber powder is as follows: figure 1 shown.

[0041] From figure 1 , figure 2 It can be seen that after the waste rubber powder is modified, the surface of the rubber powder is ...

Embodiment 2

[0042] Example 2 (modified rubber powder vulcanizate and unmodified rubber powder vulcanizate)

[0043] A preparation method of modified waste rubber powder, specifically comprising the following steps:

[0044] (1) masticating 100 parts by mass of waste rubber powder and 0.1 part by mass of peptizer pentachlorothiophenol at room temperature for 20 minutes to obtain activated rubber powder;

[0045] (2) Mix 8 parts by mass of coupling agent KH550 with 100 parts by mass of epoxidized natural rubber (40 degrees of epoxy) at 80° C. for 10 minutes to obtain a modifier;

[0046] (3) Add 12 parts by mass of modifier to 100 parts by mass of activated rubber powder, and mix at room temperature for 15 minutes to obtain modified waste rubber powder.

[0047] Preparation of rubber powder vulcanizate:

[0048]Add the same compounding agent (zinc oxide 4 weight parts, stearic acid 2 weight parts, accelerator CZ1. parts by weight, 0.5 parts by weight of accelerator DM, 2 parts by weight ...

Embodiment 3

[0052] Embodiment 3 (NR / modified waste rubber powder composite material)

[0053] A kind of application of modified waste rubber powder is the preparation of rubber / rubber powder composite material:

[0054] According to the commonly used rubber formulation, 100 parts by weight of natural rubber is added with compounding agents (4 parts by weight of zinc oxide, 2 parts by weight of stearic acid, 1.5 parts by weight of accelerator CZ, 0.5 parts by weight of accelerator DM, 2 parts by weight of sulfur parts), then respectively add 20 parts by weight of unmodified waste rubber powder and 10 to 30 parts by weight of the modified waste rubber powder prepared in Example 2, mix at 130°C for 5min, and then press the curing time T90 at 150°C Vulcanization and pressing to obtain NR / modified waste rubber powder composite materials and NR / unmodified waste rubber powder composite materials. The performance test results of the obtained vulcanized rubber materials, namely NR / modified waste ...

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Abstract

The invention belongs to the field of a macromolecule material, and discloses modified scrap rubber powder as well as a preparation method and an application thereof. The modified scrap rubber powder is prepared by activated rubber powder and a modifier, wherein the activated rubber powder is prepared by 100 parts by weight of scrap rubber powder and 0.1 to 5 parts by weight of plasticizer; the modifier is prepared by 100 parts by weight of epoxidized natural rubber and 0.5 to 20 parts of coupling agent. The surface activity of the modified scrap rubber powder is enhanced, the surface of the rubber powder is modified by means of a mechano-chemical method and the modifier in different steps, so that the compatibility of the modified scrap rubber powder with non-polar and polar rubber matrices and a thermosetting resin matrix is obviously improved; the cohesive capacity of the scrap rubber powder with polymers is enhanced, and the performance of the modified scrap rubber powder and a composite material is improved; the application range of the scrap rubber powder is enlarged, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a modified waste rubber powder and its preparation method and application. Background technique [0002] my country is the world's largest rubber consumer, and at the same time it is a country relatively scarce in rubber resources. Nearly 80% of natural rubber and 40% of synthetic rubber depend on imports, and the import dependence of natural rubber is higher than that of petroleum and iron. Mining and food, etc., ranked first, while the consumption of tires accounted for more than 70% of the total rubber. As the price of natural rubber and synthetic rubber continues to rise, making full use of waste tires is of great significance to alleviate the pressure of my country's serious shortage of rubber resources, reduce environmental pollution, and reduce production costs. [0003] At present, the comprehensive utilization of waste rubber can be divided into two processes...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08L15/00C08K5/544C08J11/28C08L9/02C08L13/00C08L11/00C08L7/00C08L9/00C08L9/06C08L63/00C08L61/06C08L101/02
CPCY02W30/62
Inventor 王小萍张欣贾德民
Owner SOUTH CHINA UNIV OF TECH
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