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Preparation method for synergetic reinforcing and toughening polypropylene composite material

A composite material and polypropylene-based technology, which is applied in the preparation of synergistically reinforced and toughened polypropylene-based composite materials and the reinforcement and toughening process of extrusion-molded polypropylene-based composite materials, can solve the problems of decreased strength and rigidity, complex process, The problem of high cost is to achieve the effect of balancing excellent toughness and rigidity, simple preparation process and remarkable effect.

Active Publication Date: 2016-03-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the method of chemical modification can also produce a certain effect on improving the impact strength of polypropylene, the process of this method is complicated, the cost is high, and it is not suitable for continuous production.
[0009] To sum up, the existing methods of toughening polypropylene are accompanied by the decline of strength and rigidity, or the problem of complex process control

Method used

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  • Preparation method for synergetic reinforcing and toughening polypropylene composite material
  • Preparation method for synergetic reinforcing and toughening polypropylene composite material
  • Preparation method for synergetic reinforcing and toughening polypropylene composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Polypropylene (PP, 1300, Maoming Petrochemical) and polyolefin elastomer (POE, 8150, DuPont-Dow Chemical) were selected as experimental raw materials, and the melt indices of the two were 2.5g / 10min (215°C, 2.16 Kg) and 0.8g / 10min (230°C, 5Kg). The blend of polypropylene and polyolefin elastomer with a mass ratio of 80 / 20 is mixed and granulated by twin-screw extrusion, and vacuum-dried before use. The temperature of each stage of twin-screw extrusion granulation is set at 165-190- 200-195°C;

[0036] (2) Put the dried blend masterbatch into a multi-stage stretching device consisting of a single-screw extruder (1), a confluence (2), a force assembly unit (3), and a cooling roll (4) (see figure 1 ) in a single-screw extruder. Through the continuous splitting and shearing action of four one-two-force assembly units, it flows out from the discharge port, and after traction, calendering and cooling, a polypropylene-based sheet with a thickness of about 1.8mm is obtain...

Embodiment 2

[0040] (1) Polypropylene (PP, 1300, Maoming Petrochemical) and polyolefin elastomer (POE, 8150, DuPont-Dow Chemical) were selected as experimental raw materials, and the melt indices of the two were 2.5g / 10min (215°C, 2.16 Kg) and 0.8g / 10min (230°C, 5Kg). The blend of polypropylene and polyolefin elastomer with a mass ratio of 80 / 20 is mixed and granulated by twin-screw extrusion, and vacuum-dried before use. The temperature of each stage of twin-screw extrusion granulation is set at 165-190- 200-195°C;

[0041] (2) Put the dried blend masterbatch into a multi-stage stretching device consisting of a single-screw extruder (1), a confluence (2), a force assembly unit (3), and a cooling roll (4) (see figure 1 ) in a single-screw extruder. After 6 assembling units divided into two, it flows out from the discharge port, and after being drawn and calendered by a traction cooling roller, a polypropylene-based sheet with a thickness of about 1.8mm is obtained. The temperatures of t...

Embodiment 3

[0048] (1) Polypropylene (PP, K1001, Yanshan Petrochemical) and polyolefin elastomer (POE, 8200, Dow Chemical) were selected as experimental raw materials, and the melt indices of the two were 1.0g / 10min (215°C, 2.16Kg) and 5.0g / 10min (215°C, 2.16Kg). The blend of polypropylene and polyolefin elastomer with a mass ratio of 80 / 20 is subjected to twin-screw extrusion, mixing, granulation, and vacuum drying before use. The temperature of each stage of twin-screw extrusion granulation is set at 175-195- 210-205°C;

[0049] (2) Put the dried blend masterbatch into a multi-stage stretching device consisting of a single-screw extruder (1), a confluence (2), a force assembly unit (3), and a cooling roll (4) (see figure 1 ) in a single-screw extruder. After three assembling units divided into two, it flows out from the discharge port, and after traction, calendering and cooling, a PP / POE composite material with a thickness of about 0.6mm is obtained. The temperatures of the feeding ...

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Abstract

The invention discloses a preparation method for a synergetic reinforcing and toughening polypropylene composite material. The preparation method is characterized in that in the extrusion molding machining process, under the stimulation effect of an external stress field, the crystal habit of a polypropylene base is evolved into shish-kebab structures tightly arranged in a high orientation manner, and the intensity of the polypropylene material can be obviously improved through formation of the shish-kebab structures; and a flexibilizer dispersion phase form is evolved into the fiber shape and sheet shape from the sphere shape or ellipsoidal shape under the effects of a stretching force field and a rolling force field, and the toughness of the polypropylene material can be obviously improved through formation of the fiber or sheet-shaped dispersion phase form. By means of the preparation method, a force assembling unit is additionally arranged on a traditional extrusion device, operation is simple, continuous production can be achieved, control is convenient, the quality is stable, the production efficiency is high, the good industrialization and the good market prospect are achieved, and the preparation method can be widely applied to preparation of high strength and high toughness polypropylene base panels, sheets and film materials.

Description

technical field [0001] The invention relates to a method for preparing a synergistically reinforced and toughened polypropylene-based composite material, in particular to a reinforced and toughened process for extruding a polypropylene-based composite material, and belongs to the technical field of polymer material processing. Background technique [0002] Polypropylene has excellent comprehensive properties, such as chemical stability, non-toxic, odorless, tasteless, good formability, low relative density, and excellent mechanical properties. Therefore, polypropylene is widely used in automobiles, construction, home furnishing, and home appliances. In the large and small fields of daily life such as packaging and printing industry, its production capacity and consumption in the field of general plastic applications are second only to polyethylene. From 2010 to 2014, in just four years, my country's polypropylene production capacity increased from 9.68 million tons / year at t...

Claims

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Application Information

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IPC IPC(8): B29C69/02C08L23/12C08L23/08C08L53/02
Inventor 吴宏王建峰郭少云夏立超
Owner SICHUAN UNIV
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