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High-strength and high-toughness polypropylene product prepared from nucleating agent self-formed fibers

A polypropylene, high-strength technology, used in the field of high-strength and high-toughness polypropylene parts, can solve the problems of difficulty in simultaneously improving the strength and toughness of polypropylene materials, limited application potential, and increased energy consumption, and achieves significant axial tension. Tensile strength, high quality competitive advantage, enhanced effect of high efficiency

Inactive Publication Date: 2021-02-02
JIESHOU CITY TIANHONG PACKAGING MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, domestic and foreign academia and industry have conducted a lot of research on improving the mechanical properties of polypropylene, and also disclosed many new processing methods for polymer devices, such as chemically modifying polypropylene for the low-temperature toughness of polypropylene tubes. The elastic phase is introduced into the polypropylene matrix, thereby improving the low-temperature toughness of polypropylene devices (Tan, H.Li, L.Chen, Z.Song, Y.Zheng, Q., Polymer, 2005, 46,: 3522); adding carbon nanotubes in the polypropylene body, thereby improving the tensile strength of polypropylene parts (Shanju Zhang, Wei Lin, Ching-Ping Wong, Zhang, etal.Acs Applied Materials & Interfaces, 2010, 2 (6) :1642-1647.); adding β-nucleating agent induces the formation of a large number of β-crystals with excellent impact resistance in polypropylene parts, which can effectively improve the toughness of polypropylene materials (Ruihua, L., L.Zhujun, et al .Journal of Applied Polymer Science, 2012,125(4):2764-2770). However, the above method can only improve the tensile strength or toughness of polypropylene parts alone, and it is difficult to improve the strength and toughness of polypropylene materials at the same time
More importantly, in order to improve the nucleation efficiency of the nucleating agent, the processing temperature often needs to exceed 230°C, and the extreme condition needs to reach 270°C, which not only greatly increases energy consumption, but also may cause degradation, and the application potential is limited

Method used

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  • High-strength and high-toughness polypropylene product prepared from nucleating agent self-formed fibers
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  • High-strength and high-toughness polypropylene product prepared from nucleating agent self-formed fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The ethanolamine-nano-calcium carbonate blend containing 1 wt% of the mass fraction is placed in a ball mill and ball-milled for 10 minutes to prepare ethanolamine-modified nano-calcium carbonate.

[0038] First put 0.1 part of TMB-5 type β-nucleating agent, 100 parts of homopolypropylene, and 1 part of ethanolamine-modified nano-calcium carbonate into a high-mixer for thorough mixing, then place the mixture in a conventional injection molding device, and extrude The temperature of the melting section of the machine is 200°C, and the temperature of the die is 180°C for melt injection molding, and the standard spline with a length of 100mm, a width of 10mm and a thickness of 4mm is obtained by injection molding.

[0039] The axial tensile strength of the sample is 40.0MPa, the elongation at break is 1000%, and the impact strength is 10.0kJ / m 2 .

Embodiment 2

[0041] Put the blend of triethanolamine and talc powder containing 1wt% mass fraction in a ball mill, and ball mill for 10 minutes to prepare triethanolamine-modified talc powder.

[0042]First put 0.1 part of TMB-5 type β-nucleating agent, 100 parts of homopolypropylene, and 1 part of triethanolamine modified talcum powder into a high-mixer for thorough mixing, then place the mixture in a conventional injection molding device, and extrude The temperature of the melting section of the machine is 210°C, and the temperature of the die section is 200°C for melt injection molding, and the standard spline with a length of 100mm, a width of 10mm, and a thickness of 4mm is obtained by injection molding.

[0043] The axial tensile strength of the sample is 46.2MPa, the elongation at break is 1400%, and the impact strength is 18.7kJ / m 2 .

Embodiment 3

[0045] Put the blend of butanediol and activated carbon containing 1 wt% mass fraction in a ball mill, and ball mill for 10 minutes to prepare butanediol-modified activated carbon.

[0046] First put 0.3 parts of NU-100 type β-nucleating agent, 100 parts of homopolypropylene, and 2 parts of butanediol modified activated carbon into a high-mixer for thorough mixing, then place the mixture in a conventional injection molding device, and extrude The temperature of the melting section of the machine is 200°C, and the temperature of the die section is 190°C for melt injection molding, and a standard sample with a length of 100mm, a width of 10mm, and a thickness of 4mm is obtained by injection molding.

[0047] The axial tensile strength of the spline is 43.6MPa, the elongation at break is 1100%, and the impact strength is 12.9kJ / m 2 .

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Abstract

The invention discloses a high-strength and high-toughness polypropylene product prepared from nucleating agent self-formed fibers, and relates to the technical field of polypropylene product processing. The product is prepared from the following components in parts by weight through melt blending and conventional injection molding: 100 parts of polypropylene, 0.01-3 part of beta nucleating agentand 0.1-3 part of polar additive. A fiber-forming beta nucleating agent is adopted, in the adopted injection molding process under the induction of shearing and speed, nucleating agent fibers which are arranged in the axial direction and have different length-diameter ratios can be regulated and controlled to be formed by adjusting the use amount and variety of polar additives, oriented crystallization of polymers along the surfaces of the fibers is promoted, and oriented beta-type crystal structures with different length-diameter ratios are formed. The beta-type polypropylene has good toughness, so that the obtained polypropylene product not only has remarkable axial tensile strength, but also has good toughness.

Description

Technical field: [0001] The invention relates to the technical field of polypropylene parts processing, in particular to a high-strength and high-toughness polypropylene part prepared by self-fiber formation of a nucleating agent. Background technique: [0002] Polypropylene material has excellent comprehensive properties, such as low thermal conductivity, high temperature resistance, corrosion resistance, easy processing, etc., and is widely used in various fields. However, there is still a certain gap between the performance of domestic polypropylene resin and imported resin. Most domestic polypropylene device manufacturers use imported resin for production. In 2010, my country imported more than 4 million tons of polypropylene. In addition, polypropylene devices processed by conventional techniques still have the defect of poor impact strength. The reason is that the prepared polypropylene device mainly produces coarse radial α-spherulites, and the connection between the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08K9/04C08K3/26C08K3/34C08K5/20C08K7/24C08K5/18C08K7/26C08K5/092
CPCC08K9/04C08K9/08C08K3/26C08K5/20C08K3/34C08K7/24C08K5/18C08K7/26C08K5/092C08K2201/011C08K2003/265C08L2205/242C08L23/12C08L23/14
Inventor 李怡俊吴磊聂敏王琪胡伟李汪洋
Owner JIESHOU CITY TIANHONG PACKAGING MATERIAL
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