Modified polypropylene resin with high ultrasonic welding strength and preparation method thereof

An ultrasonic welding, polypropylene resin technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of less heat generation, low welding energy utilization rate, low ultrasonic welding strength, etc.

Active Publication Date: 2021-07-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention aims to propose a modified polypropylene resin with high ultrasonic welding strength, so as to solve the problem that the existing polypropylene resin welding energy utilization rate is low, heat production is small, and the ultrasonic welding strength of polypropylene resin is low. question

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  • Modified polypropylene resin with high ultrasonic welding strength and preparation method thereof
  • Modified polypropylene resin with high ultrasonic welding strength and preparation method thereof

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Embodiment 1

[0027] A modified polypropylene resin with high ultrasonic welding strength, comprising the following components by mass percentage: polypropylene: 90%, random polypropylene: 5%, modified expanded graphite: 1%, compatibilizer: 3%, processing aids: 1%.

[0028] In the present embodiment, the modified expanded graphite is modified by the following method:

[0029] After the expanded graphite was pretreated at a high temperature of 850° C. for 27 seconds, it was ultrasonically dispersed in an acidic solution for 50 minutes to obtain modified expanded graphite, wherein the pH of the acidic solution was 3, and the acidic solution was a sulfuric acid solution.

[0030] The preparation method of the above-mentioned modified polypropylene resin with high ultrasonic welding strength specifically comprises the following steps:

[0031] According to the above raw material formula, after mixing polypropylene, random polypropylene, modified expanded graphite, compatibilizer and processing...

Embodiment 2

[0033] A modified polypropylene resin with high ultrasonic welding strength, comprising the following components by mass percentage: polypropylene: 85%, random polypropylene: 8%, modified expanded graphite: 2%, compatibilizer: 3%, processing aids: 1%.

[0034] In the present embodiment, the modified expanded graphite is modified by the following method:

[0035] After the expanded graphite was pretreated at a high temperature of 850° C. for 27 seconds, it was ultrasonically dispersed in an acidic solution for 50 minutes to obtain modified expanded graphite, wherein the pH of the acidic solution was 3, and the acidic solution was a sulfuric acid solution.

[0036] The preparation method of the above-mentioned modified polypropylene resin with high ultrasonic welding strength specifically comprises the following steps:

[0037] According to the above raw material formula, after mixing polypropylene, random polypropylene, modified expanded graphite, compatibilizer and processing...

Embodiment 3

[0039] A modified polypropylene resin with high ultrasonic welding strength, comprising the following components by mass percentage: polypropylene: 83%, random polypropylene: 10%, modified expanded graphite: 3%, compatibilizer: 3%, processing aids: 1%.

[0040] In the present embodiment, the modified expanded graphite is modified by the following method:

[0041] After the expanded graphite was pretreated at a high temperature of 850° C. for 27 seconds, it was ultrasonically dispersed in an acidic solution for 50 minutes to obtain modified expanded graphite, wherein the pH of the acidic solution was 3, and the acidic solution was a sulfuric acid solution.

[0042] The preparation method of the above-mentioned modified polypropylene resin with high ultrasonic welding strength specifically comprises the following steps:

[0043] According to the above raw material formula, after mixing polypropylene, random polypropylene, modified expanded graphite, compatibilizer and processin...

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Abstract

The invention provides a modified polypropylene resin with high ultrasonic welding strength and a preparation method thereof. The modified polypropylene resin with high ultrasonic welding strength comprises the following components in terms of mass percentage: polypropylene: 75-90 %, random polypropylene: 5-15%, modified expanded graphite: 1-5%, compatibilizer: 1-5%, processing aid: 1-5%. The present invention can effectively improve the weldability of polypropylene, improve the overall loss modulus of the material, and promote ultrasonic The heat generated during the welding process can effectively improve the thermal conductivity of the material, which is beneficial to the initiation and development of the nugget at the welding interface, and obtain a polypropylene welded joint with high welding strength.

Description

technical field [0001] The invention relates to the technical field of polymer modification, in particular to a modified polypropylene resin with high ultrasonic welding strength and a preparation method thereof. Background technique [0002] Polypropylene resin is one of the four general-purpose thermoplastic resins, which has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing performance; due to the excellent performance of polypropylene, it is widely used in Many fields such as machinery, automobile and food packaging. In recent years, with the rapid development of my country's packaging, electronics, automobile and other industries, the connection problem of polypropylene products has become more and more prominent. [0003] The ultrasonic welding process is a kind of friction welding, which uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Un...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L39/06C08K13/06C08K9/02C08K7/24C09K5/14
CPCC08K2201/005C08L23/12C08L2205/025C08L2205/035C08L2205/08C08L2207/14C09K5/14C08L39/06C08K13/06C08K9/02C08K7/24
Inventor王钧武壮杨小利代巍
OwnerWUHAN UNIV OF TECH