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Polypropylene material with high bath strength and preparation method

A high-melt-strength polypropylene material technology, applied in the field of high-melt-strength polypropylene material and its preparation, can solve problems such as unfavorable melt strength

Active Publication Date: 2007-12-26
河北福恩特电气设备集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But as mentioned earlier, the simple addition of clay cannot form a uniformly dispersed structure at the nanoscale, and the use of compatibilizers is very detrimental to the melt strength of the system

Method used

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  • Polypropylene material with high bath strength and preparation method
  • Polypropylene material with high bath strength and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Raw material components (by weight): component (A) is 100 parts of homopolypropylene, produced by Daqing Petrochemical Company, and the brand is T30S; component (B) is 0.08 parts of dicumyl peroxide (commercially available) ; Component (C) is 1.2 parts of pentaerythritol triacrylate (commercially available); Component (D) is 0.10 part of dimethylthiuram disulfide (commercially available); Component E is organoclay (Nanomer 1.44 , produced by Nanocor Corporation of the United States) 2 parts.

[0038] The structure and function of the twin-screw extruder: the extruder used is a co-rotating building block type meshing twin-screw extruder, the diameter of the screw is 30mm, the ratio of length to diameter is 40, the speed is controlled by frequency conversion, and the temperature is controlled by seven stages. , Carry out vacuum exhaust in the sixth section of the extruder.

[0039] Preparation of high-melt-strength polypropylene: use a high-speed mixer to mix all the abo...

Embodiment 2

[0043] Raw material components: component (A) is 100 parts of homopolypropylene, produced by Daqing Petrochemical Company, the brand is T30S; component (B) is 0.06 parts of dicumyl peroxide (commercially available); component (C) Be 1.0 parts of pentaerythritol triacrylate (commercially available); Component (D) is 0.08 part of dimethylthiuram disulfide (commercially available); Component E is organoclay (Nanomer I.44, produced by U.S. Nanocor Corporation) 2 servings.

[0044] All the other operating steps and implementation methods are the same as in Example 1.

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Abstract

This invention relates to a method for preparing propylene material with high melt strength. The propylene material is composed of: propylene 100 parts, organic peroxide initiator 0.002-4 parts, multifunctional monomer 0.005-5 parts, branching promoter 0.001-4 parts, and organic clay 0.1-10 parts. The dispersion degree of organic clay is 10-100 nm. The method comprises: uniformly mixing propylene, organic peroxide initiator, multifunctional monomer, branching promoter and organic clay, adding into a twin-screw extruder, melting, extruding and granulating with temperature, rotation speed and feeding rate controlled to obtain gel-free propylene material with high melt strength. During the in-situ intercalation process, organic clay is dispersed in the polymer matrix on nanoscale. Uniformly dispersed organic clay can control the formation of branching structure, and improve the melt strength and mechanical properties of the propylene material. The propylene material is suitable for extrusion foaming and other thermal molding processes.

Description

Technical field: [0001] The invention relates to a high-melt-strength polypropylene material containing a long-chain branched structure prepared from a linear-structured polypropylene by a reactive extrusion method and a preparation method thereof. From this high melt strength polypropylene material, a foamed polypropylene material containing fine and uniform cells can be obtained. Background technique: [0002] Foam plastic has the advantages of low density, high specific strength, strong energy absorption capacity, and good sound and heat insulation performance. In thermoplastic polyolefin foam, compared with expanded polystyrene and expanded polyethylene, expanded polypropylene has many unique advantages: (1) The flexural modulus of polypropylene is about 1.52GPa, which is much higher It is about 200MPa lower than that of polyethylene, so the static load capacity of polypropylene foam is better than that of polyethylene; (2) The glass transition temperature of polypropyl...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08F255/02C08F4/32C08F2/38C08F2/44B29C47/40B29C47/92B29C48/405B29C48/92
CPCB29C47/92B29C48/92B29C2948/92704B29C48/04B29C2948/9259B29C2948/926B29C2948/92828B29C2948/92866B29C2948/92885B29C2948/92895B29C48/405
Inventor 董金勇倪青林范家起徐怀书
Owner 河北福恩特电气设备集团有限公司
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