Method of palliating degradation degree in polypropylene fusion graft process

A technology of melting grafting and polypropylene, which is applied in the field of polymer polymerization and processing, can solve the problems of low grafting rate of degradation, etc., and achieve the effect of increasing grafting rate, excellent performance, and improved processing performance

Inactive Publication Date: 2007-02-28
JIANGSU POLYTECHNIC UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for alleviating the degree of degradation in the process of polypropylene melt grafting in view of the defects of serious degradation and low grafting rate in the current polypropylene melt grafting process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] composition

[0026] The preparation process is as follows: 100 parts of polypropylene, 1.0 part of maleic anhydride, 0.12 parts of initiator TX101, and 0.3 parts of antioxidant 1010 are mixed uniformly according to the proportion. Then use the twin-screw extruder to carry out the melt extrusion grafting reaction. The temperature of each section of the twin-screw extruder is respectively: the temperature in zone I is 170°C, the temperature in zone II is 200°C, the temperature in zone III is 220°C, and the temperature in zone IV is 220°C. The temperature in zone V is 220°C, the head temperature is 220°C, the screw speed is 45r / min, and the residence time of the material in the twin-screw extruder is 3min. Then the grafted product is cooled and pelletized to obtain the product.

Embodiment 2

[0028] composition

[0029] The preparation process is as follows: mix 100 parts of polypropylene, 1.0 parts of maleic anhydride, 0.12 parts of initiator TX101, 0.3 parts of antioxidant 1010, and 0.65 parts of the second monomer divinylbenzene according to the proportion, and add them into the twin-screw extruder The hopper of the machine, and then use the twin-screw extruder to carry out the melt extrusion grafting reaction. The temperature of each section of the twin-screw extruder is respectively: the temperature in zone I is 170°C, the temperature in zone II is 200°C, the temperature in zone III is 220°C, and the temperature in zone IV is 220°C. The temperature is 220°C, the temperature in the V zone is 220°C, the head temperature is 220°C, the screw speed is 45r / min, and the residence time of the material in the twin-screw extruder is 3min. Then the grafted product is cooled and pelletized to obtain the product.

Embodiment 3

[0031] composition

[0032] The preparation process is as follows: 100 parts of polypropylene, 5.0 parts of polyether acrylate, 0.12 parts of initiator TX101, and 0.3 parts of antioxidant 1010 are uniformly mixed according to the ratio, and then reacted in a twin-screw extruder. The temperature of each section of the twin-screw extruder is: the temperature in zone I is 170°C, the temperature in zone II is 200°C, the temperature in zone III is 220°C, the temperature in zone IV is 220°C, the temperature in zone V is 220°C, the temperature of the head is 220°C, and the screw speed is 45r / min, the residence time of the material in the twin-screw extruder is 3min. Then the grafted product is cooled and pelletized to obtain the product.

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PUM

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Abstract

The invention discloses a method to reducing degree of degradation under polypropylene melting grafted process, which is comprises the following steps: 1. adding grafted monomer, secondary monomer, trigger, anti-oxidant and polypropylene to high-velocity dispersion machine and mixing evenly; the usage of grafted monomer is 0.5%-15% of polypropylene total quantity; the usage of secondary monomer is 0.1%-10% of polypropylene total quantity; the usage of trigger is 0.1%-15% of anti-oxidant; the usage of anti-oxidant is 0.1%-1.5% of polypropylene total quantity; 2. adding the mixture of first step into bi-bolt force out machine; melting; squeezing grafted reaction; 3. cooling and dicing squeezing material of the second step get graft modified polypropylene of degraded to a less extent, graft ratio increased.

Description

technical field [0001] The invention relates to a method for improving the degradation degree of polypropylene melt grafting by using a multifunctional monomer. The invention belongs to the technical field of polymer polymerization and processing. Background technique [0002] Polypropylene (PP) is the fastest-growing variety among the five general-purpose thermoplastics. With the continuous improvement of polypropylene production technology, the performance of polypropylene has been greatly improved. However, since polypropylene is a non-polar, highly crystalline polymer, its molecular chain lacks polar reactive groups, resulting in very poor hydrophilicity, dyeability, cohesiveness, and antistatic properties. These disadvantages largely limit the application of polypropylene in some fields. In order to improve these properties of polypropylene, people have done a lot of research work, and grafting some polar groups on the molecular chain of polypropylene by chemical gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02B29C47/40
Inventor 俞强姚自力丁永红吴海萍王宏标秦文伟
Owner JIANGSU POLYTECHNIC UNIVERSITY
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