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A polypropylene material having high melt strength and a preparing method thereof

A polypropylene material with high melt strength technology, applied in the field of polymer material modification, can solve the problems of severe degradation of polypropylene, monomer residue, gelation, etc., to reduce self-polymerization, degradation and cross-linking, The effect of stable product quality

Inactive Publication Date: 2019-04-02
SHANDONG YUHUANG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since reactive extrusion is generally carried out at a high temperature above 175°C, it is easy to cause severe degradation of polypropylene and gelation problems. At the same time, due to the short reaction time, polypropylene is often accompanied by initiator decomposition products and monomer residues.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high melt strength polypropylene material obtained by the following parts by mass:

[0022] 100 parts of polypropylene, 25 parts of styrene, 0.25 parts of dicumyl peroxide, 1 part of antioxidant 1010.

[0023] Add the well-mixed initiator and monomer into the polypropylene under the protection of nitrogen, and stir for 20 minutes to fully soak the monomer and initiator into the polypropylene. Rapidly raise the temperature to 125°C to react for 2 hours, cool down to room temperature, mix with antioxidant and extrude to granulate. The melt strength of the obtained polypropylene was 807 Pa·S, and the melt index was 3.5.

Embodiment 2

[0025] A high melt strength polypropylene material obtained by the following parts by mass:

[0026] 100 parts of polypropylene, 30 parts of styrene, 0.25 parts of diacetyl peroxide, 1 part of antioxidant 1010.

[0027] The preparation method of the high-melt-strength polypropylene material is the same as in Example 1. The melt strength of the obtained polypropylene is 951 Pa·S, and the melt index is 3.0.

Embodiment 3

[0029] A high melt strength polypropylene material obtained by the following parts by mass:

[0030] 100 parts of polypropylene, 20 parts of styrene, 5 parts of pentaerythritol triacrylate, 0.25 parts of dicumyl peroxide, and 1 part of antioxidant 1010.

[0031] The preparation method of the high-melt-strength polypropylene material is the same as in Example 1. The melt strength of the obtained polypropylene is 1172 Pa·S, and the melt index is 2.3.

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PUM

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Abstract

The invention relates to the technical field of polymer material modification, and particularly discloses a polypropylene material having high melt strength and a preparing method thereof. The methodincludes (1) fully mixing 100 parts of polypropylene powder, 2-30 parts of a grafting monomer and 0.01-2 parts of an initiator; and (2) reacting the mixture at 110-140 DEG C for 1-2 h, cooling the reaction product, then adding 0.5-1.5 parts of an antioxidant, and granulating the mixture through an extruder to obtain the polypropylene having high melt strength. Through adjusting the ratio of the polypropylene, the grafting monomer and the initiator, a prepared product is stable in quality, excellent in processing performance and prone to industrial production, and can be applied in the fields of blow molding, vacuum thermal forming, extrusion coating, foaming, and the like.

Description

(1) Technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a high-melt strength polypropylene material and a preparation method thereof. (2) Background technology [0002] Polypropylene has the characteristics of low density, high melting point, wide source, low price, superior mechanical properties, and good chemical stability. It is widely used in packaging, light industry, construction, electronics, electrical appliances, and automobiles. It is currently the fastest growing industry. One of the resins. However, conventional polypropylene is a semi-crystalline resin with a linear structure, its molecular weight distribution is relatively narrow, its softening point is close to its melting point, and its melting range is relatively short. Strain hardening cannot occur when stretched in the state, resulting in poor sag resistance of the polymer, uneven wall thickness of thermoformed products, edge curling and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F212/08C08F222/20C08F222/14
CPCC08F222/1006C08F222/102C08F222/104C08F255/02C08F212/08
Inventor 刘言张恩贺侯红霞
Owner SHANDONG YUHUANG CHEM CO LTD
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