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Method of promoting polyolefin grafting reaction

A technology of grafting reaction and polyolefin, which is applied in the field of polyolefin modification, can solve the problems of limited number of polar groups and low efficiency of grafting reaction, and achieve good processability

Active Publication Date: 2017-02-22
ENERGY RES INST OF SHANDONG ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage is that the grafting reaction efficiency is not high, and only the plasma is used to modify the polyolefin, and the number of polar groups on the surface of the polyolefin is limited.

Method used

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  • Method of promoting polyolefin grafting reaction
  • Method of promoting polyolefin grafting reaction
  • Method of promoting polyolefin grafting reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: comparative example

[0035] Weigh 86.999 parts of LDPE (parts by weight, the same below, Yanshan Petrochemical LD160, melt index 5.0g / 10min), 10.0 parts of maleic anhydride, 0.001 parts of dibenzoyl peroxide, 3.0 parts of antioxidant 1010, and Dissolve dibenzoyl in 5.0 parts of acetone, mix low-density polyethylene, dibenzoyl peroxide solution, maleic anhydride, and antioxidant 1010 in a high-speed mixer for 60 minutes, and add the above mixture to the hopper of the extruder In the process, the temperature of each zone of the extruder is between 150°C and 180°C, the speed of the main screw is 60 rpm, and the speed of the feeding screw is 70 rpm. Bulk graft modified polyolefin particles.

Embodiment 2

[0037] Weigh 86.999 parts of LDPE (parts by weight, the same below, Yanshan Petrochemical LD160, melt index 5.0g / 10min), 10.0 parts of maleic anhydride, 0.001 parts of dibenzoyl peroxide, 3.0 parts of antioxidant 1010, and Dibenzoyl was dissolved in 5.0 parts of acetone. Place LDPE in a low-temperature plasma reaction device, such as figure 1 As shown, first vacuumize, feed argon, gas pressure 50Pa, radio frequency discharge power 30W, discharge time 20min, then surface modified LDPE, maleic anhydride, dibenzoyl peroxide solution, antioxidant 1010 at high speed Mix in the mixer for 60 minutes, put the mixture into the hopper of the extruder, and react under the conditions of 80°C, the main screw speed is 50 rpm, and the feeding screw speed is 70 rpm, and the extruded product is drawn, cooling, drying and pelletizing to obtain polyolefin particles grafted with polar compounds. Among them, low-temperature plasma reaction device and extruder are commonly used equipment in this ...

Embodiment 3

[0039] Weigh 86.999 parts of LDPE (parts by weight, the same below, Yanshan Petrochemical LD160, melt index 5.0g / 10min), 10.0 parts of maleic anhydride, 0.001 parts of dibenzoyl peroxide, 3.0 parts of antioxidant 1010, and Dibenzoyl was dissolved in 5.0 parts of acetone. Put LDPE in a low-temperature plasma reaction device, pass through argon / oxygen (volume ratio 4 / 1) mixed gas, gas pressure 50Pa, radio frequency discharge power 30W, discharge time 20min, then surface modified LDPE, maleic anhydride , dibenzoyl peroxide solution, and antioxidant 1010 were mixed in a high-speed mixer for 60 minutes, and the mixture was put into the hopper of the extruder, at 80°C, the main screw speed was 50 rpm, and the feeding screw speed was 70 rpm The reaction is carried out under the condition of 1 / min, and the extruded product is drawn, cooled, dried and pelletized to obtain polyolefin particles grafted and modified by polar compounds.

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Abstract

The invention discloses a method of promoting polyolefin grafting reaction. The method includes following steps: performing plasma treatment on polyolefin to obtain surface-modified olefin; well mixing the surface-modified olefin, polar monomer, a solution containing an initiator and an antioxidant, putting into an extruder for reaction, and subjecting extrudate to traction, cooling, drying and cutting into particles to obtain polar compound graft modified polyolefin particles. Plasma is utilized to modify polyolefin, so that number of polar groups on the surface of polyolefin can be increased, polarity of polyolefin can be improved, and improving of compatibility with a polar compound in the extruder is facilitated; the polar groups introduced by the plasma can be utilized for condensation reaction with the polar compound in the extruder to graft the polar compound onto polyolefin, and the polar compound can be further grafted onto polyolefin by utilizing the initiator, so that grafting efficiency can be improved greatly.

Description

technical field [0001] The invention relates to a polyolefin modification method, in particular to a method for promoting polyolefin grafting reaction. Background technique [0002] Polyolefin is a kind of general-purpose plastic with the largest output. It has excellent electrical insulation, water repellency, chemical solvent corrosion resistance, low temperature and ductility. At the same time, it has low cost and good processing performance. It mainly includes low-density polyethylene, High density polyethylene, linear low density polyethylene, polypropylene, ethylene propylene copolymer, ethylene octene copolymer, etc. However, polyolefins are non-polar materials, and their dyeability and adhesion are poor, and their compatibility with other polar polymers is poor. These shortcomings restrict their application in many fields. [0003] Introducing polar groups, such as carboxyl groups, acid anhydrides, hydroxyl groups, epoxy groups, ester groups, etc., into the polyolef...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F222/06C08F222/04C08F220/32C08F220/18B29C47/92B29C48/92
CPCC08F255/023B29C48/92B29C2948/9258B29C2948/92704C08F220/325C08F220/1802
Inventor 蒋波蔡飞鹏
Owner ENERGY RES INST OF SHANDONG ACAD OF SCI
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