Polypropylene composite material containing potassium titanate crystal whiskers and wood powder

A technology of potassium titanate whiskers and potassium hexatitanate whiskers, which is applied in the field of polypropylene modification, can solve the problems of low tensile strength and impact performance, large shrinkage, etc., and achieve good compatibility, lower viscosity, and insulation The effect of excellent thermal performance

Inactive Publication Date: 2009-09-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of polypropylene such as low tensile strength, modulus, impact performance, and large shrinkage rate. Using this method, the mechanical properties and thermal stability of polypropylene can be signi

Method used

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  • Polypropylene composite material containing potassium titanate crystal whiskers and wood powder
  • Polypropylene composite material containing potassium titanate crystal whiskers and wood powder
  • Polypropylene composite material containing potassium titanate crystal whiskers and wood powder

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Isotactic polypropylene PP is used as the matrix, PP-g-MAH (maleic anhydride grafted polypropylene) is added as a compatibilizer, wood flour and potassium hexatitanate whiskers are used as reinforcing agents; the wood flour is at 80℃ After drying, the potassium hexatitanate whiskers are treated with n-butyl titanate and then dried in an oven. Subsequently, wood powder and inorganic fillers, toughening agents, wax powder and other additives are mixed in a mixer, and then granulated in an extruder, and potassium hexatitanate whiskers are added from the side feed port. Then injection molded into test specimens to measure performance. The blend component content is as follows (in parts by weight):

[0031] Isotactic polypropylene PP 650

[0032] Wood flour 150

[0033] Potassium hexatitanate whiskers 75

[0034] Compatibilizer PP-g-MAH 100

[0035] N-butyl titanate coupling agent 3

[0036] Inorganic filler 50

[0037] Toughening agent (POE) 50

[0038] Honey...

Example

[0044] Examples 2~6

[0045] In the following examples, the preparation method of the polypropylene composite material is the same as that of Example 1, and the different compositions used are shown in Table 3.

[0046] Table 2 The polypropylene composite material components of Examples 2-6 (by weight)

[0047]

[0048]

[0049] Table 3 The performance indexes of the polypropylene composite materials of Examples 2-6

[0050]

[0051]It can be seen from Example 2 that when the ratio of wood flour to potassium titanate whiskers is 5:1, the performance of the polypropylene composite material is not greatly improved, and when the ratio of wood flour to potassium titanate whiskers is 1:1 When (Example 6), and the potassium titanate whisker content is greater than 10%, because too much potassium titanate is easy to agglomerate, the performance of the polypropylene composite material is not greatly improved, and the cost is relatively high. When the ratio of wood powder to potassiu...

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Abstract

The invention relates to a polypropylene composite material containing wood powder and potassium titanate crystal whiskers, which comprises the following compositions in portion by weight: 600 to 800 portions of polypropylene, 100 to 400 portions of wood powder, 10 to 180 portions of potassium titanate crystal whiskers, 0 to 100 portions of inorganic filler, 0 to 100 portions of toughening agent, 0 to 50 portions of wax powder and 10 to 150 portions of other auxiliary agents, wherein the optimum proportion of the wood powder to the potassium titanate crystal whiskers is controlled to be between 3:1 and 2:1. Due to adoption of the method for adding the potassium titanate crystal whiskers and the wood powder in the polypropylene, the varisized modification of the polypropylene is realized; the combination of the wood powder and substrate polypropylene in the polypropylene is more stable; the defects in the material are further reduced; the strength, the impact resistance and the heat resistance of the prior modified polypropylene are further improved; and simultaneously the viscosity of a polypropylene fused mass system is reduced to make the application scope of the polypropylene wider.

Description

technical field [0001] The invention proposes a method for preparing reinforced polypropylene mainly modified by composite modification of potassium titanate whiskers and wood powder, which belongs to the technical field of polypropylene modification. Background technique [0002] Polypropylene is a thermoplastic resin produced by the polymerization of propylene. There are three configurations: isotactic, atactic and syndiotactic, and industrial products use isotactic as the main component. Polypropylene has a melting temperature of about 174°C and a density of 0.91 g / cm3. It is the lightest general-purpose plastic with high strength, high hardness, wear resistance, bending fatigue resistance, heat resistance up to 120°C, excellent moisture resistance and chemical resistance. , easy processing, low price and widely used general-purpose polymer materials. There are two main disadvantages of polypropylene. One is the large shrinkage rate, which leads to poor dimensional stabi...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L97/02C08K13/04C08K7/08
Inventor 汪济奎茅双明邱春长赵光付义术郭卫红
Owner EAST CHINA UNIV OF SCI & TECH
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