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Polypropylene composite and preparation method thereof

A technology of polypropylene composition and propylene copolymer, which is applied in the field of polyolefin materials, can solve the problems of high equipment requirements, large energy consumption, cumbersome polymerization process, etc., and achieve the effect of uniform distribution and good compatibility

Inactive Publication Date: 2010-11-24
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to address the disadvantages of cascade reaction of multiple polymerization kettles or graded reaction of multiple polymerization kettles in most current methods for preparing polypropylene compositions, the polymerization process is cumbersome, the requirements for equipment are high, and the energy consumption is large , providing a method for the preparation of polypropylene compositions by staged polymerization using a single heterogeneous Ziegler-Natta catalyst in a reactor

Method used

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  • Polypropylene composite and preparation method thereof
  • Polypropylene composite and preparation method thereof
  • Polypropylene composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Under the atmosphere of propylene monomer, 4.32mmol triethylaluminum, 100mL n-heptane and 0.1g heterogeneous Ziegler-Natta catalyst (wherein the titanium compound is selected from TiCl 4 The mass content of titanium is 3.0%, the mass content of magnesium dichloride is 80%, the mass content of fluorene diether is 10%), the propylene monomer pressure is 0.1MPa, the polymerization temperature is 40 ℃, and the homopolymerization time is 6min, obtains Propylene homopolymer; add 40ml 1-octene, continue to feed propylene gas, make the propylene gas pressure 0.1MPa, and make the heterogeneous Ziegler-Natta catalyst continue to initiate the copolymerization of propylene and 1-octene; copolymerization temperature at 80°C, and the copolymerization time was 1 hour. Terminate the reaction with 50 ml of 1 wt% acidified ethanol, heat and stir for 30 minutes, filter, wash with ethanol, and vacuum-dry to obtain a polypropylene composition material composed of a propylene homopolymer and...

Embodiment 2

[0037] Operation is the same as in Example 1, except that the homopolymerization time of propylene is 30min. The results are shown in Table 1.

Embodiment 3

[0039] The operation is the same as in Example 1, except that the homopolymerization time of propylene is 120min. The results are shown in Table 1.

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Abstract

The invention belongs to the polyolefin material field, in particular relates to a preparation method of polypropylene composite and the polypropylene composite obtained by the preparation method. The invention adopts single heterogeneous Ziegler-Natta catalyst to carry out staging polymerization in a kettle, so as to prepare polypropylene composite, and homopolymerization time of propylene and copolymerization time of propylene and high grade alpha-olefin as well as monomer charging ratio are controlled to regulate content of propylene and high grade alpha-olefin copolymer in polypropylene composite, thus obtaining polypropylene composite with adjustable structure and property. The polypropylene composite is composed of propylene homopolymer and propylene copolymer; wherein the propylene copolymer is obtained by propylene and high grade alpha-olefin by copolymerization, the mass content of high grade alpha-olefin in the propylene copolymer is 1-85%, and propylene copolymer accounts for 3-95% of total mass of polypropylene composite.

Description

technical field [0001] The invention belongs to the field of polyolefin materials, in particular to a preparation method of a polypropylene composition and a polypropylene composition prepared by the method. Background technique [0002] As a general-purpose plastic, polypropylene has poor low-temperature impact resistance, which greatly affects its application range; therefore, in order to broaden the application range of polypropylene, research on the modification of polypropylene has developed extremely rapidly. Among them, the modification research for the purpose of improving the impact strength of polypropylene (PP) has been carried out the most, and the toughening modification of polypropylene (PP) includes copolymerization modification, blending modification, and addition of nucleating agents. Toughening plastics with rubber or thermoplastic elastomers dispersed in the form of elastic micro-materials has been proven to be an effective method. It is a type of method t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F210/06C08L23/12C08L23/14
Inventor 贺爱华毕福勇韩志超
Owner INST OF CHEM CHINESE ACAD OF SCI
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