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Beta-crystal synergetic reinforcing and toughening polypropylene random copolymer (PP-R) composite material and preparation method thereof

A random copolymerization, strengthening and toughening technology, which is applied in the field of β-crystal synergistically reinforced and toughened random copolymerized polypropylene composite materials and its preparation, can solve the problems of low impact toughness, easy deformation and brittle cracking of products, and achieve improved Effects of toughness, reduction in rigidity, and excellent overall performance

Inactive Publication Date: 2014-09-03
SHANGHAI RUIHE ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As one of the general-purpose plastics, polypropylene (PP) plays an increasingly important role in life and production because of its excellent comprehensive performance and relatively low price. However, due to its low impact toughness, low-temperature brittleness, The disadvantages such as easy deformation of the product greatly limit its application

Method used

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  • Beta-crystal synergetic reinforcing and toughening polypropylene random copolymer (PP-R) composite material and preparation method thereof
  • Beta-crystal synergetic reinforcing and toughening polypropylene random copolymer (PP-R) composite material and preparation method thereof
  • Beta-crystal synergetic reinforcing and toughening polypropylene random copolymer (PP-R) composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weighing formula raw materials:

[0029]

[0030] SiO 2 Airgel and silane coupling agent were stirred at 40°C for 10 min to prepare modified SiO 2 airgel. Modified SiO 2 Airgel, polyolefin elastomer (POE), and chelating agent are added to a twin-screw extruder to prepare particles. Blend the prepared particles, PP-R, β-nucleating agent, antioxidant 1010 and antioxidant 168 in a high-speed mixer for 5-10 minutes at high speed, and then add them to a twin-screw extruder for extrusion and manufacture pellets, the extruded pellets are added to the injection molding machine for injection molding. The properties are shown in Table 1.

Embodiment 2

[0032] Weighing formula raw materials:

[0033]

[0034] SiO 2 Airgel and titanate coupling agent were stirred at 60°C for 10 min to prepare modified SiO 2 airgel. Modified SiO 2 Airgel, polyolefin elastomer (POE), and chelating agent are added to a twin-screw extruder to prepare particles. Blend the prepared particles, PP-R, β-nucleating agent, antioxidant 1010 and antioxidant 168 in a high-speed mixer for 5-10 minutes at high speed, and then add them to a twin-screw extruder for extrusion and manufacture pellets, the extruded pellets are added to the injection molding machine for injection molding. The properties are shown in Table 1.

Embodiment 3

[0036] Weighing formula raw materials:

[0037]

[0038] SiO 2 Airgel and aluminate coupling agent were stirred at 50°C for 10 min to prepare modified SiO 2 airgel. Modified SiO 2 Airgel, polyolefin elastomer (POE), and chelating agent are added to a twin-screw extruder to prepare particles. Blend the prepared particles, PP-R, β-nucleating agent, antioxidant 1010 and antioxidant 168 in a high-speed mixer for 5-10 minutes at high speed, and then add them to a twin-screw extruder for extrusion and manufacture pellets, the extruded pellets are added to the injection molding machine for injection molding. The properties are shown in Table 1.

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Abstract

The invention discloses a Beta-crystal synergetic reinforcing and toughening polypropylene random copolymer (PP-R) composite material and a preparation method thereof. The formula of the composite material comprises the following components by mass percent: 70% to 100% of polypropylene random copolymer (PP-R), 1% to 20% of polyolefin elastomer, 1% to 20% of SiO2 aerogel, 0.01% to 0.3% of Beta-nucleating agent, 0.5% to 3% of chelating agent, 0.1% to 1% of antioxidant and 0.5% to 3% of coupling agent. The composite material has the beneficial effects that the tenacity of the polypropylene random copolymer (PP-R) is obviously improved while the rigidity of the polypropylene random copolymer is not decreased by adding a small quantity of the SiO2 aerogel, the polyolefin elastomer and the Beta-nucleating agent, so that the composite material has the excellent comprehensive performance. Thus, the impact-resistance strength of the modified PP-R composite material is improved from 48.7KJ / m<2> to 72.7KJ / m<2>; the tensile strength of the modified PP-R composite material is improved from 27.4MPa to 35.5MPa; the elongation at break of the modified PP-R composite material is improved from 328% to 1320%.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a β-crystal synergistically reinforced and toughened random copolymerized polypropylene composite material and a preparation method thereof. Background technique [0002] As one of the general-purpose plastics, polypropylene (PP) plays an increasingly important role in life and production because of its excellent comprehensive performance and relatively low price. However, due to its low impact toughness, low-temperature brittleness, The disadvantages such as easy deformation of the product greatly limit its application. Therefore, toughening PP to broaden its application fields has always been the focus and hotspot of people's research. At present, commonly used modification methods include: chemical modification, including: copolymerization modification, graft modification, cross-linking modification, calcium chloride; physical modification, including: elastomer blen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/00C08L35/00C08L51/06C08K13/06C08K9/06C08K9/04C08K3/36C08K5/134C08K5/526
CPCC08L23/14C08K2201/003C08L2205/03C08L2205/242C08L2207/14C08L23/0815C08L33/02C08K13/06C08K9/06C08K7/26C08K9/04
Inventor 陈桥光
Owner SHANGHAI RUIHE ENTERPRISE GRP