High-melt-strength polypropylene material as well as preparation method and application thereof
A polypropylene material with high melt strength technology, which is applied in the field of engineering plastics, can solve problems such as poor toughness, low melt strength, and floating fibers on the surface, and achieve the effects of improving stability, high melt strength, and improving melt strength
Inactive Publication Date: 2021-04-30
KINGFA SCI & TECH CO LTD
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Problems solved by technology
[0003] At present, the polyolefin materials suitable for blow molding and blister use are basically pure HDPE or PP resins. These resins can be molded well, but they still need to be improved in terms of heat resistance and strength.
In the industry, the high strength and high rigidity of glass fibers are usually used to improve product strength and heat resistance, but conventional glass fiber reinforced polypropylene materials have low melt strength, low melt elongation, surface floating fibers and poor toughness And other issues
Method used
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Effect test
Embodiment 1-11 and comparative example 1-2
[0037] Examples 1-11 and Comparative Examples 1-2: Preparation of High Melt Strength Polypropylene Material
[0038] Weigh each component according to the formula content in Table 1, and mix the components evenly, then add the mixture to the main feeding system of the twin-screw extruder; then melt blending and extrusion granulation through the twin-screw extruder A polypropylene material was obtained.
[0039] Among them, the temperature of the first to second zone of the extruder is 120°C-160°C, the temperature of the third to fifth zone is 180°C-300°C, the temperature of the fifth to tenth zone is 180°C-300°C, and the screw speed is 300 rpm-600rpm.
[0040] Test standards or methods for each performance:
[0041] Melt strength: Melt extensional rheometer test, test condition: 180°C;
[0042] Melt fracture velocity: Melt extensional rheometer test, test condition: 180°C.
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Abstract
The invention discloses a high-melt-strength polypropylene material as well as a preparation method and application thereof. The high-melt-strength polypropylene material comprises the components in parts by weight: 10-90 parts of straight-chain polypropylene, 0.5-50 parts of polypropylene with a long branched chain, and 0.01-20 parts of a fluorine compound. Long molecular chains of straight-chain polypropylene are utilized to increase entanglement among the molecular chains, thereby being beneficial to enhancing the stability of the melt during extrusion and plastic uptake; by adding the polypropylene with the long branched chain and utilizing the branched chain structure, the melt strength can be greatly improved; and the fluorine compound is not molten in the forming process, and can be stretched into fibers under the action of the melt, so that the polypropylene molecular chain and the fluorine compound fibers form an interpenetrating network, and the melt strength of the whole material is further improved. The polypropylene material prepared in the method has high melt strength, and is mainly suitable for blow molding, plastic uptake and other occasions.
Description
technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a high-melt-strength polypropylene material and its preparation method and application. Background technique [0002] Polypropylene material is currently the most used polymer material. It has excellent processing properties and mechanical properties. It is widely used in daily life and industrial production fields, such as: agricultural film, wire and cable, communication, housing construction and aviation manufacturing. Wait. [0003] At present, the polyolefin materials suitable for blow molding and blister use are basically pure HDPE or PP resins. These resins can be molded well, but they still need to be improved in terms of heat resistance and strength. In the industry, the high strength and high rigidity of glass fibers are usually used to improve product strength and heat resistance, but conventional glass fiber reinforced polypropylene materials have low me...
Claims
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IPC IPC(8): C08L23/12C08L27/18
CPCC08L23/12C08L2205/025C08L2205/03C08L2205/04C08L27/18
Inventor 陆湛泉黄险波叶南飚陈平绪程文建程书文姜向新杨霄云
Owner KINGFA SCI & TECH CO LTD
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