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Method for promoting property of nano calcium carbonate and polypropylene composite material

A technology of nano-calcium carbonate and composite materials, which is applied in the field of improving the impact resistance of nano-calcium carbonate and polypropylene composite products, and can solve the problems of inability to achieve heat treatment effects, deformation, and no heat treatment of nano-calcium carbonate/polypropylene composite products Reports and other issues to achieve the effect of facilitating industrial applications, improving impact resistance, and eliminating internal stress

Inactive Publication Date: 2008-06-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Usually, the heat treatment method of plastic products is generally to immerse the product in hot oil, hot water or hot air, and adjust the annealing temperature according to the different types of plastics. To deform, if the temperature is too low, the heat treatment effect cannot be achieved
At present, there is no report on the heat treatment of nano-calcium carbonate / polypropylene composite products

Method used

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  • Method for promoting property of nano calcium carbonate and polypropylene composite material
  • Method for promoting property of nano calcium carbonate and polypropylene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First prepare the nano-calcium carbonate / polypropylene composite masterbatch, the average particle diameter of the nano-calcium carbonate is 30 nanometers, and the main composition of the masterbatch is: 50% of the nano-calcium carbonate and 50% of the polypropylene. The amount of masterbatch in the nano-calcium carbonate / polypropylene composite product is 5%, the amount of polypropylene is 95%, the content of nano-calcium carbonate in the product is 2.5%, and the polypropylene is 97.5%. The heat treatment is carried out in a hot air oven. The heat treatment temperature at 65°C for 15 minutes, the notched impact strength is 26.8KJ / m 2 .

Embodiment 2

[0020] The heat treatment temperature is 105°C, the time is 1min, the rest are the same as in Example 1, and the notched impact strength is 32.6 KJ / m 2 .

Embodiment 3

[0022] The heat treatment temperature is 105°C, the time is 5min, the rest is the same as in Example 1, and the notched impact strength is 43.3KJ / m 2 .

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Abstract

The invention provides a method for promoting property of nano calcium carbonate and polypropylene composite material, wherein calcium carbonate having average grain diameter of 30-50 nanometers is used as the raw material to prepare nano calcium carbonate and polypropylene composite material whose content of calcium carbonate is 2.5-7%, the composite material also includes polypropylene 97.5-92.8%, and processing auxiliary agent 0-0.2% which is low molecular polystyrene.

Description

technical field [0001] The invention relates to a method for improving the performance of plastic products, in particular to a method for improving the impact resistance of nanometer calcium carbonate and polypropylene composite material products. Background technique [0002] Nano-calcium carbonate and polypropylene composite material is a new type of inorganic-organic composite material, which is usually processed by injection molding or extrusion. Adding calcium carbonate is beneficial to improve the impact strength, flexural elastic modulus, hardness and other properties of the composite material. , and can reduce the cost of materials. The properties of nano-calcium carbonate and polypropylene composites are affected by many factors, among which the primary factor is the dispersion of nano-calcium carbonate in the composite. Nano-calcium carbonate particles are prone to coalescence, which affects the improvement of the performance of composite materials such as impact ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K3/26
Inventor 陈建峰王国全刘洋曾晓飞邹海魁陈国术
Owner BEIJING UNIV OF CHEM TECH