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Low-temperature ultrahigh-toughness polypropylene blended composite material and preparation method thereof

A technology of ultra-high toughness and composite material, which is applied in the field of low-temperature ultra-high toughness polypropylene blended composite material and its preparation, polypropylene blended composite material and its preparation field, and can solve the unreported preparation method of quaternary blended composite material , complex process and other problems, to achieve the effect of low price, simple operation process and low production cost

Inactive Publication Date: 2020-09-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two patented processes are more complicated
The same or similar low-temperature ultra-high toughness polypropylene / ethylene-octene block copolymer / β nucleating agent / carbon nanotube quaternary blend composite material and its preparation method have not been reported in the above patents

Method used

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  • Low-temperature ultrahigh-toughness polypropylene blended composite material and preparation method thereof
  • Low-temperature ultrahigh-toughness polypropylene blended composite material and preparation method thereof
  • Low-temperature ultrahigh-toughness polypropylene blended composite material and preparation method thereof

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Embodiment 1～7 and comparative example 1-6

[0030] (1) Pre-mixing: Mix carbon nanotubes, β-nucleating agent, ethylene-octene block copolymer with a glass transition temperature lower than -45ºC, and isotactic polypropylene in proportions by weight at room temperature for pre-mixing. mix. The specific formula is shown in Table 1.

[0031] (2) Extrusion and granulation of carbon nanotubes / β nucleating agent / ethylene-octene block copolymer / polypropylene premix: use a conventional twin-screw extruder for industrial use to process the premix in step (1) Melt mixing and extrusion granulation. The extrusion process conditions adopted are: feeding section temperature (1-2 section) 160°C, shear blending section temperature (3-8 section) 180-195°C, extrusion section temperature (9-10 section) 190°C, The screw speed was 80 rpm, and the extruded strands were cooled in cold water at 23 °C, and then granulated by a granulator. The specific process parameters are shown in Table 2.

[0032] (3) Injection molding of carbon nanotubes...

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Abstract

The invention discloses a low-temperature ultrahigh-toughness polypropylene blended composite material and a preparation method thereof, and belongs to the field of polymer processing modification, and discloses a blended composite material. The polypropylene blended composite material is prepared from, by weight, 70 to 90 parts of polypropylene, 10 to 30 parts of an ethylene-octene block copolymer, 0.1 part of a beta nucleating agent and 0.05 to 2 parts of carbon nanotubes. The preparation method comprises the following steps: premixing the carbon nanotubes, the beta nucleating agent, the ethylene-octene block copolymer and the polypropylene, carrying out melt blending granulation on the obtained premix through an extruder, and preparing the polypropylene blended composite material product by adopting an injection molding machine. The carbon nanotubes, the beta nucleating agent and the ethylene-octene block copolymer are added at the same time to generate a low-temperature synergistictoughening effect on polypropylene, so that the polypropylene blended composite material shows very excellent low-temperature toughness.

Description

technical field [0001] The invention relates to a polypropylene blended composite material and a preparation method thereof, in particular to a low-temperature ultra-high toughness polypropylene blended composite material and a preparation method thereof, belonging to the field of polymer processing and modification. Background technique [0002] As one of the five general-purpose plastics, polypropylene has been widely used in automobiles, household appliances, electronics, food packaging and other fields due to its excellent comprehensive properties, easy processing, and low production costs. However, polypropylene has an obvious disadvantage, that is, poor toughness, especially low temperature toughness, which greatly limits its application expansion. [0003] Researchers have started research on the toughening and modification of polypropylene since the 1970s, and developed a series of methods for toughening and modifying polypropylene. The introduction of elastomers in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/00C08K3/04
CPCC08K2201/011C08L23/12C08L2205/242C08L2207/10C08L53/00C08K3/041
Inventor 陈妍慧吴志强周会会刘振国张亮亮
Owner NORTHWESTERN POLYTECHNICAL UNIV
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