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Polypropylene toughening modification process

A technology of toughening and modifying polypropylene, which is applied in the chemical industry, can solve problems such as limited improvement and loss of rigidity, and achieve the effects of improving physical and chemical properties, improving rigidity, and avoiding agglomeration

Inactive Publication Date: 2017-12-12
泾县金强塑胶材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, it is found that compared with other toughening methods such as increasing rigidity and toughening materials, cross-linking and toughening, elastomer toughening modification is the most effective in terms of actual effects and theoretical models, but rigidity The loss is also obvious, and the improvement of this problem is still relatively limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A polypropylene toughening modification process, comprising the steps of:

[0027] (1) Polyolefin elastomer treatment:

[0028] a. After mixing polyolefin elastomer with titanate coupling agent and dicumyl peroxide at a mass ratio of 95:1.5:0.2, put it into a torque rheometer and melt and extrude it. Take out material A for later use;

[0029] b. Add 2% of the total mass of dibutyltin dilaurate to the material A obtained in operation a, mix it and extrude it, then put it into a temperature of 50°C for heat preservation for 2 hours, and obtain material B for later use;

[0030] c. Add 10% of the total mass of nano-silica and 0.1% of ferrocene to the material B obtained in operation b, and then put it into a high-temperature double-roller plastic scouring machine for 6 minutes of plastic scouring, and after completion, it will be sliced ​​and pulverized Obtain the modified polyolefin elastomer for subsequent use;

[0031] (2) Mixture preparation:

[0032] Add 11% of t...

Embodiment 2

[0043] A polypropylene toughening modification process, comprising the steps of:

[0044] (1) Polyolefin elastomer treatment:

[0045] a. After mixing polyolefin elastomer with titanate coupling agent and dicumyl peroxide at a mass ratio of 98:1.8:0.25, put it into a torque rheometer and melt and extrude it. Take out material A for later use;

[0046] b. Add 3% of the total mass of dibutyltin dilaurate to the material A obtained in operation a, mix it and extrude it, then put it into the material A at a temperature of 55°C for 2.5 hours to obtain material B for later use;

[0047] c. Add 13% of the total mass of nano-silica and 0.15% ferrocene to the material B obtained in operation b, and then put it into a high-temperature double-roller plastic scouring machine for 7 minutes of plastic scouring treatment, and after completion, the next sheet and pulverized Obtain the modified polyolefin elastomer for subsequent use;

[0048] (2) Mixture preparation:

[0049] Add 14% of t...

Embodiment 3

[0060] A polypropylene toughening modification process, comprising the steps of:

[0061] (1) Polyolefin elastomer treatment:

[0062] a. After mixing polyolefin elastomer with titanate coupling agent and dicumyl peroxide at a mass ratio of 100:2:0.3, put it into a torque rheometer for melt extrusion. Take out material A for later use;

[0063] b. Add 4% of the total mass of dibutyltin dilaurate to the material A obtained in operation a, mix and extrude, then put it into the temperature of 60 ° C for 3 hours, and obtain material B for later use;

[0064] c. Add 15% of the total mass of nano-silica and 0.2% ferrocene to the material B obtained in operation b, and then put it into a high-temperature double-roller plastic scouring machine for 8 minutes of plastic scouring. Obtain the modified polyolefin elastomer for subsequent use;

[0065] (2) Mixture preparation:

[0066] Add 16% of the total mass of the modified polyolefin elastomer obtained in step (1) to the polypropyle...

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Abstract

The invention discloses a polypropylene toughening modification process and belongs to the technical field of chemical engineering. The polypropylene toughening modification process comprises a step (1) of polyolefin elastomer processing; a step (2) mixture preparation; and a step (3) of mixture extrusion molding. Under common matching action of modified polyolefin elastomer and various auxiliaries, physicochemical properties of polypropylene are effectively improved, shock strength of polypropylene can be remarkably improved, rigidity of polypropylene can be improved, tensile yield strength can be improved by 5% or above, the application range of polypropylene is greatly expanded, and polypropylene has very high economic value.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a polypropylene toughening modification process. Background technique [0002] Polypropylene (pp) is a versatile and inexpensive plastic resin with a wide variety of uses. However, polypropylene, especially homopolypropylene, has poor impact resistance and is listed as a brittle material, which limits its application in some fields. The usual toughening modification is a blended elastomer. Although the modification effect is very good, the impact strength can be increased several times to dozens of times, but the rigidity of the material is sacrificed while toughening. The toughening mechanism of plastic blended elastomer materials can be explained by the craze-shear band theory: after adding elastomers to the brittle matrix, under the action of external impact, the elastomers can cause a large number of crazes, while the matrix produces shear bands. Cut y...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/00C08L91/06C08K13/06C08K9/10C08K3/36C08K5/134C08K5/544C08K5/5435C08K3/32C08K5/3492C08K5/101C08K5/20C08K5/10C08K5/14B29C47/92B29C48/92
CPCC08L23/12B29C48/92B29C2948/92514B29C2948/92704C08K2003/323C08K2201/011C08L2205/03C08L23/00C08L91/06C08K13/06C08K9/10C08K3/36C08K5/1345C08K5/544C08K5/5435C08K3/32C08K5/34922C08K5/34928C08K5/101C08K5/20C08K5/10C08K5/14
Inventor 李大贵胡小广
Owner 泾县金强塑胶材料有限公司
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