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Random-copolymerization polypropylene toughening modified material and preparation method thereof

A technology of random copolymerization and toughening modification, applied in the field of random copolymerization polypropylene toughening modified materials and preparation, can solve problems such as difficulty in realizing industrialization, increase production cost, increase annealing equipment, etc., to reduce energy consumption, The effect of improving performance and reducing production costs

Active Publication Date: 2012-10-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the products obtained by this method need to be annealed at high temperature, resulting in high energy consumption;
In addition, in order to achieve the excellent low-temperature impact properties of the random copolymerized polypropylene products, annealing equipment must be added, which greatly increases the production cost, and this method is especially not suitable for the production of large-scale parts, extruded products and films, and is difficult Achieve continuous industrialization

Method used

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  • Random-copolymerization polypropylene toughening modified material and preparation method thereof
  • Random-copolymerization polypropylene toughening modified material and preparation method thereof
  • Random-copolymerization polypropylene toughening modified material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] 1) Disperse molecular sieves in absolute ethanol solution for surface wetting, then add silane coupling agent, heat to 50°C in a water bath, stir for 30min at a speed of 1200r / mim; then add deionized water with a volume ratio of 1:3 Water / absolute ethanol solution, after stirring for 1 hour, add stearic acid, continue stirring for 30 minutes, suction filter while hot, and dry at 70°C for later use, wherein the mass ratio of silane coupling agent to molecular sieve is 1:50, stearic acid to molecular sieve The mass ratio is 1:10;

[0032] 2) After premixing 100 parts of random copolymerized polypropylene with ethylene content <5%, 0.5 parts of polypropylene β-nucleating agent TMB-5 and 25 parts of surface-activated molecular sieve 13X, it is passed through a twin-screw at 180~200°C The modified masterbatch is obtained by melt blending, extrusion, cooling and pelletizing by the extruder;

[0033] 3) Copolymerize 100 parts of random copolymerized polypropylene with ethylen...

Embodiment 2

[0035] 1) In this step, except that molecular sieve 4A is treated with silane coupling agent KH550, other conditions are the same as in Example 1, so the description is omitted here.

[0036] 2) After premixing 100 parts of random copolymerized polypropylene with ethylene monomer content <5%, 0.5 parts of polypropylene β-nucleating agent TMB-5 and 25 parts of surface-activated molecular sieve 4A, it was heated at 180~200°C Twin-screw extruder melt blending extrusion, cooling, pelletizing to obtain modified masterbatch;

[0037] 3) After premixing 100 parts of random copolymerized polypropylene with ethylene monomer content <5%, 10 parts of ethylene-propylene block copolymer, 8 parts of modified masterbatch, and 0.2 parts of antioxidant B215, add it to the twin-screw extruder In the extruder, melt blending and extruding at 180~200°C, cooling and pelletizing. The prepared random copolymerized polypropylene modified pellets were injection molded into products; the properties of ...

Embodiment 3

[0039] 1) After premixing 100 parts of random copolymerized polypropylene with ethylene monomer content <5% and 2 parts of polypropylene β-nucleating agent TMB-5, melt blending and extruding through a twin-screw extruder at 180~200 °C The modified masterbatch can be obtained after discharging, cooling and pelletizing;

[0040] 2) 100 parts of random copolymerized polypropylene with ethylene monomer content <5%, 10 parts of modified masterbatch, 5 parts of polypropylene homopolymer (brand YD50G, MFR: 0.3g / 10min, Liaoning Huajin), 5 parts 1 part of ethylene-propylene block copolymer, 10 parts of ethylene-propylene copolymer elastomer, 0.1 part of antioxidant B215, pre-mixed, added to the twin-screw extruder, melt blended and extruded at 180~200 ° C, cooled , Diced into pieces. The prepared random copolymerized polypropylene modified pellets were injection molded into products; the properties of the products were placed at room temperature for 24 hours and tested in the attached...

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Abstract

The invention discloses a random-copolymerization polypropylene toughening modified material which is formed by carrying out melt blending modification on the following components in parts by weight: 100 parts of random-copolymerization polypropylene, 0-15 parts of polypropylene homopolymer, 5-20 parts of ethylene copolymer, 2.5-12 parts of modifying master batch and 0.1-0.4 part of antioxidant. The tensile strength of the material is 24.7-27.3MPa, the notch impact strength at 23 DEG C is 35.0-60.5 kJ / m<2>, the notch impact strength at 0 DEG C is 7.6-20.6 kJ / m<2>, and the Vicat softening point is 131.2-138.2 DEG C. The invention also discloses a preparation method of the random-copolymerization polypropylene toughening modified material. The random-copolymerization polypropylene toughening modified material disclosed by the invention has favorable rigidity / toughness balance performance and heat resistance, can be widely used in the industries of construction materials, furniture, automobiles, electric appliances, electronics, electric appliances and the like, and can be used for preparing various profiles, tubes, films, sheets, plates, injection molding parts and the like. Besides, the preparation method is simple, can shorten the molding processing time, and can also lower the energy consumption and the production cost, thereby having high practicality.

Description

technical field [0001] The invention belongs to the technical field of polypropylene toughened and modified materials and its preparation, and in particular relates to a random copolymerized polypropylene toughened and modified material with good rigidity-toughness balance and low-temperature toughness and a preparation method. Background technique [0002] Random copolymerized polypropylene (PPR) is a new generation of polypropylene material formed by randomly and uniformly polymerizing about 3-5% ethylene monomer in the molecular chain of PP by gas phase copolymerization process in the late 1980s. Compared with homopolypropylene (PPH), it has better impact resistance, and compared with block copolymer polypropylene (PPB), it has long-term creep resistance, so PPR is often used in furniture, automobiles, etc. , construction, pipe and other fields, also has the advantages of sanitation, energy saving, long service life and so on. Unfortunately, there are two obvious weaknes...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L23/16C08L23/12C08L53/00C08L23/08C08K13/06C08K9/06C08K9/04C08K7/24C08J3/22B29B9/06B29C47/92B29C48/92
CPCB29C48/0022B29C48/04B29C48/40B29C48/911B29C48/919B29C48/92B29C2948/92704B29C2948/92895B29C2948/92923
Inventor 刘恒
Owner SICHUAN UNIV
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