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A kind of preparation method of polypropylene/polyphenylene ether alloy

A technology of polypropylene and polyphenylene ether, which is applied in the field of twin-screw reaction extrusion polypropylene/polyphenylene ether alloy and its preparation, can solve the problems of oil resistance, solvent resistance, poor processing fluidity, easy warping and deformation, and heat resistance Poor deformability and other problems, to achieve the effect of excellent comprehensive mechanical properties and simple production process

Active Publication Date: 2016-08-03
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyphenylene ether (PPO) is a non-crystalline compound, which is characterized by excellent heat resistance, chemical properties, electrical properties, dimensional stability and water resistance, but poor oil resistance, solvent resistance and processing fluidity
[0003] Polypropylene (PP) is a crystalline compound with excellent mechanical properties, oil resistance, solvent resistance and processing fluidity, but poor heat deformation resistance and easy warping deformation under high load

Method used

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  • A kind of preparation method of polypropylene/polyphenylene ether alloy
  • A kind of preparation method of polypropylene/polyphenylene ether alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 30 kg of polypropylene T30S and 49.9 kg of polypropylene PP7033N into the first-stage twin-screw extruder with a length-to-diameter ratio of 56:1 through the main feed.

[0021] Dissolve 0.1 kg of azo free radical initiator AIBN (azobisisobutyronitrile) into 5 kg of styrene monomer to form a uniform solution, and use a liquid high-pressure plunger metering pump to pass through the first-stage twin-screw extruder with an aspect ratio of 20 : One liquid material feed port is injected into the twin-screw extruder, and is evenly dispersed in the plasticized polypropylene resin melt under the action of the threaded elements of the twin-screw extruder to form a PP-g-PS graft.

[0022] The first-stage twin-screw extruder is divided into eight sections, the feed temperature of the first section is 40°C, and the temperatures from the second section to the eighth section are 120°C, 180°C, 180°C, 200°C, 200°C, 200°C, 200°C.

[0023] Under the high temperature inside the e...

Embodiment 2

[0028] (1) Add 20 kg of polypropylene S700 and 42.5 kg of polypropylene PPSP179 into the first-stage twin-screw extruder with a length-to-diameter ratio of 56:1 through the main feed.

[0029] Dissolve 0.5 kg of peroxide free radical initiator benzoyl peroxide BPO into 12 kg of styrene monomer to form a uniform solution, and use a liquid high-pressure plunger metering pump to pass through the first-stage extruder with a length-to-diameter ratio of 20:1. The material is injected into the twin-screw extruder through the feeding port, and is uniformly dispersed in the plasticized polypropylene resin melt under the action of the screw elements of the twin-screw extruder. The feed temperature in zone one is 40°C, and the temperatures in zone two to zone eight are 120°C, 180°C, 180°C, 200°C, 200°C, 200°C, and 200°C, respectively.

[0030] Under the high temperature inside the extruder and the shear dispersion of the screw element, styrene undergoes a graft copolymerization reaction ...

Embodiment 3

[0035] (1) Add 38 kilograms of polypropylene PPK9017 into the first-stage twin-screw extruder with a length-to-diameter ratio of 56:1 through the main feed, and dissolve 2 kilograms of peroxide free radical initiator dicumyl peroxide DCP into 20 Kilograms of styrene monomer form a homogeneous solution, and use a liquid high-pressure plunger metering pump to inject the liquid material into the twin-screw extruder through the feeding port of the first-stage extruder with a length-to-diameter ratio of 20:1. Uniformly dispersed in plasticized polypropylene resin melt under action. The feed temperature in Zone 1 is 40°C, and the temperatures in Zone 2 to Zone 8 are 120°C, 180°C, 180°C, 200°C, 200°C, 200°C, 200°C.

[0036] Under the high temperature inside the extruder and the shear dispersion of the screw element, styrene undergoes a graft copolymerization reaction under the initiation of a free radical initiator, a part of styrene forms a homopolymer, and a part of styrene is graf...

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Abstract

The invention discloses a double-screw reaction extruded polypropylene / polyphenylene oxide (PP / PPO) alloy and a preparation method thereof. The polypropylene / polyphenylene oxide alloy is mainly composed of 38wt%-79.9wt% of polypropylene, 15wt%-40wt% of polyphenylene oxide, 5wt%-20wt% of styrene and 0.1wt%-2wt% of a radical initiator. The preparation method comprises the following steps: mainly feeding the polypropylene into a first-order double-screw extruder. namely dissolving the radical initiator into a styrene monomer to form a uniform solution, and injecting from a liquid material charging opening of the first-order double-screw extruder; injecting PPO resin into a second-order extruder through a charging hopper of the second-order extruder; and blending the PPO resin with a melt conveyed from the first-order double-screw extruder to finally form the PP / PPO alloy. The PP / PPO alloy material provided by the invention has an excellent comprehensive mechanical property and can replace a traditional ABS material.

Description

technical field [0001] The invention belongs to the field of polymer materials and their molding processing, and in particular relates to a twin-screw reactive extrusion polypropylene / polyphenylene oxide (PP / PPO) alloy and a preparation method thereof. Background technique [0002] Polyphenylene oxide (PPO) is a non-crystalline compound, which is characterized by excellent heat resistance, chemical properties, electrical properties, dimensional stability and water resistance, but poor oil resistance, solvent resistance and processing fluidity. [0003] Polypropylene (PP) is a crystalline compound with excellent mechanical properties, oil resistance, solvent resistance and processing fluidity, but poor heat deformation resistance under high load and easy warping and deformation. After blending these two resins, they can make up for their respective shortcomings and become a new plastic alloy with excellent comprehensive performance. The performance can be compared with ABS, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08L25/06C08L71/12C08F255/02C08F112/08
CPCB29C48/92B29C2948/92704C08F255/02C08L23/12C08L71/12C08L2205/025C08L2205/035C08L2205/08C08L51/06C08L25/06C08F212/08
Inventor 李国明孙刚周英辉
Owner SHANGHAI KINGFA SCI & TECH