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High strength and high toughness modified poly-propylene material

A modified material, polypropylene technology, applied in the field of polypropylene-based modified materials, can solve the problems of low heat resistance level, poor toughness, poor impact resistance of PP, etc., to improve the heat resistance level and improve thermal deformation. effect of temperature

Inactive Publication Date: 2007-08-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under normal processing conditions, α crystal form (α-PP) is formed. This crystal form of PP itself has the characteristics of poor toughness and low heat resistance level, which is also the reason for the poor impact resistance of PP.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The magnesium salt whiskers are surface treated with 2.5% (by weight) titanate coupling agent. Get processed whisker 3kg, and 10kg polypropylene (homopolymer, brand F401, melt flow rate 2.5g / 10min, density 0.91g / cm 3 ), 0.75kg POE, and 10g rare earth beta nucleating agent were mixed evenly, and mixed and granulated with a twin-screw extruder. According to GB1039, GB1040, GB 1043, GB 1634 and other standards, the prepared pellets are prepared through injection machine to prepare standard specimens, and the mechanical properties and thermal deformation temperature are measured.

[0022] The properties of the obtained material are as follows: Charpy notched impact strength is 9.02kJ / m 2 , flexural modulus 2079MPa, heat distortion temperature 119 ℃.

[0023] As a comparison, the notched impact strength of pure PP is 4.55kJ / m 2 , flexural modulus 1008MPa, heat distortion temperature 87 ℃.

Embodiment 2

[0025] Others are the same as in Example 1, wherein the magnesium salt whiskers are replaced by mica, and the resulting material properties are as follows: Charpy notched impact strength is 7.91kJ / m 2 , flexural modulus 1886MPa, heat distortion temperature 122 ℃.

Embodiment 3

[0027] Others are the same as in Example 1, wherein the matrix homopolypropylene is replaced by block copolymer polypropylene (the grade is EPS30RF, the melt flow rate is 2.6g / 10min (230°C, 2.16kg), and the properties of the obtained material are as follows: Charpy notched impact Strength is 58.96kJ / m 2 , flexural modulus 1031MPa, heat distortion temperature 117 ℃.

[0028] As a comparison, the notched impact strength of pure PP is 40.61kJ / m 2 , flexural modulus 867MPa, heat distortion temperature 83 ℃.

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Abstract

The present invention belongs to the field of polymer material technology, and is especially one kind of modified polypropylene material comprising at least polymer base, strengthening agent and toughening agent. The polymer base may be polypropylene or polypropylene composition; the strengthening agent is inorganic or organic matter with great aspect ratio, such as inorganic or organic crystal whisker, fiber, mica, etc; and the toughening agent may be polypropylene beta-nucleater, rubber elastomer, etc. The modified polypropylene material has high strength, high toughness, etc and may be applied widely in automobile, pipeline, electric appliance and other fields.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a modified material based on polypropylene (PP). The material is at least composed of the following three components: polymer matrix, reinforcing agent, toughening agent, and other components may also be contained. The modified material is characterized by high strength and toughness, or high heat distortion temperature. Background technique [0002] Polypropylene has been widely used because of its low density, excellent electrical properties, corrosion resistance, hygiene, moisture resistance, and good processability. However, PP also has shortcomings such as poor toughness (especially low notched impact strength), insufficient high-temperature strength and rigidity, and low heat-resistant grades, which limit its use in wider fields, especially as engineering materials in automobiles, manufacturing, and construction. , chemical pipelines and other high-e...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K9/00C08L23/16C08L9/00C08K3/00C08K7/00
Inventor 冯嘉春武培怡郑德
Owner FUDAN UNIV
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