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 blend composite material and its preparation, polypropylene blend composite material and its preparation field, which can solve the complex process and unreported quaternary blend composite material. Material preparation method and other problems, to achieve the effect of simple operation process, low price and low production cost
Pending Publication Date: 2020-12-18
NORTHWESTERN POLYTECHNICAL UNIV
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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
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Embodiment 1～7 and comparative example 1-6
[0030](1) Pre-mixing: pre-mixing carbon nanotubes, β nucleating agent, ethylene-octene block copolymer with glass transition temperature lower than -45ºC, and isotactic polypropylene in parts by weight ratio at room temperature for pre-mixing. mixing. The specific formula is shown in Table 1.
[0031](2) Extrusion and granulation of carbon nanotube / β nucleating agent / ethylene-octene block copolymer / polypropylene premix: the premix in step (1) is treated with a conventional industrial twin-screw extruder Melt mixing and extrusion granulation. The extrusion process conditions adopted are: feeding section temperature (1-2 section) 160℃, shear blending section temperature (3-8 section) 180~195℃, extrusion section temperature (9-10 section) 190℃, The screw speed is 80 rpm, and the extruded strands are cooled in cold water at 23 ℃ and then pelletized by a pelletizer. The specific process parameters are shown in Table 2.
[0032](3) Injection molding of carbon nanotube / β nucleating agent / ethylen...
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Abstract
The invention discloses a low-temperature ultrahigh-toughness polypropylene blended composite material and a preparation method thereof, which belong to the field of polymer processing modification. The blended composite material is composed of the following raw materials in parts by weight: 70-90 parts of polypropylene, 10-30 parts of ethylene-octene block copolymer, 0.1 part of beta nucleating agent and 0.05-2 parts of carbon nanotubes. The preparation method comprises the following steps of premixing the carbon nanotubes, the beta nucleating agent, the ethylene-octene block copolymer and the polypropylene, carrying out melt blending granulation on the premix through an extruder, and preparing the polypropylene blended composite material product by adopting an injection molding machine.The carbon nanotube, the beta nucleating agent and the ethylene-octene block copolymer are added at the same time to generate a low-temperature synergistic toughening effect on polypropylene, so thatthe 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, and belongs 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 performance, easy processing, and low production cost. However, polypropylene has an obvious disadvantage, that is, poor toughness, especially low temperature toughness, which greatly limits its application expansion.[0003]Researchers have been studying the toughening modification of polypropylene since the 1970s and have developed a series of toughening modification methods for polypropylene. The introduction of elastomers into polypropylene is the m...
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IPC IPC(8): C08L23/12C08L53/00C08K3/04
CPCC08L23/12C08L2205/242C08K2201/011C08L2207/10C08L53/00C08K3/041
Inventor 陈妍慧夏伟龙权利军樊倩孙森淼刘振国张秋禹
Owner NORTHWESTERN POLYTECHNICAL UNIV