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Method for modifying packing, alpha-cristobalite powder, used for polymer material

A technology of polymer materials and cristobalite powder, which is applied in the field of filler modification for polymer materials, can solve the problems of reducing the tensile strength, impact strength, and inability to disperse uniformly of polymer composite materials, and achieve good lipophilicity and improved Sexual Effects Good Effects

Inactive Publication Date: 2014-12-24
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, cristobalite is directly used as a filler, which cannot be uniformly dispersed in PVC resin, which seriously reduces the tensile strength, impact strength and other properties of polymer composites.

Method used

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  • Method for modifying packing, alpha-cristobalite powder, used for polymer material
  • Method for modifying packing, alpha-cristobalite powder, used for polymer material
  • Method for modifying packing, alpha-cristobalite powder, used for polymer material

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Effect test

Embodiment 1

[0021] A method for modifying filler α-cristobalite powder used in polymer materials, wherein: the activator used is aluminate coupling agent (DL-411A), and the specific steps are as follows:

[0022] Step 1: Dissolve the aluminate coupling agent with a solvent at room temperature, put it into a round bottom flask, and put it into an ultrasonic cleaner to accelerate the dissolution of the aluminate coupling agent in the solvent for 8 minutes to 10 minutes;

[0023] Step 2: Put the self-made α-cristobalite powder into the prepared aluminate coupling agent solution, disperse it ultrasonically for 28 min to 30 min, make the reactant thick, put it into the electric heating mantle and heat it at 110°C Under heating for 8 hours, take out the powder obtained after the reaction.

[0024] Described solvent is toluene.

[0025] The mass percent content of the aluminate coupling agent is 3.8%.

[0026] The aluminate coupling agent solution in the step 2 is recovered with a condenser. ...

Embodiment 2

[0048] Compared with Example 1, other conditions remain unchanged, the solvent used is absolute ethanol, and the activation index of α-cristobalite powder is 31.5%.

Embodiment 3

[0050] Compared with Example 1, other conditions remain unchanged, the solvent used is DMF, and the activation index of α-cristobalite powder is 45.6%.

[0051] Composite materials were prepared by using modified α-cristobalite powder and PVC resin. Its processing performance, mechanical properties and thermal stability were detected, and it was found that when the amount of modified α-cristobalite filler was 10%, the rheological performance and thermal stability were the highest, and the processing difficulty was the lowest. According to the SEM picture of the cross-section of the material, it is found that the dispersion of the filler in the PVC resin is the best, and the interface bonding effect with the PVC matrix is ​​the best, so that the tensile strength and impact strength of the composite material are improved.

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Abstract

The invention discloses a method for modifying a packing, alpha-cristobalite powder, used for a polymer material. A used activating agent is an aluminate coupling agent (DL-411A), and a used solvent is one of absolute ethyl alcohol, methylbenzene and DMF. The quality percentage content of the aluminate coupling agent is 3.8-4.4 percent, an aluminate coupling agent solution is recovered by a condensation pipe, and the heating temperature of the aluminate coupling agent solution in an electric jacket is 110 DEG C. The method has the beneficial effects of improving the hydrophobicity of alpha-cristobalite powder by modification, enabling powder particles to be easier to disperse in organic high-molecular polymers, and ensuring that the alpha-cristobalite powder serves as the polymer material packing to be possible.

Description

technical field [0001] The invention relates to the technical field of filler modification for polymer materials, in particular to a method for modifying filler α-cristobalite powder for polymer materials. Background technique [0002] Quartz is an ideal filler for polymer materials because of its stable physical and chemical properties. Quartz raw ore is transformed into cristobalite after impurity removal and high-temperature calcination. Cristobalite has high whiteness, low density, and excellent performance. It is rarely studied as a polymer filler. However, cristobalite is directly used as a filler, and cannot be uniformly dispersed in PVC resin, which seriously reduces the tensile strength, impact strength and other properties of polymer composite materials. Due to the hydrophilicity of the surface of quartz powder, it is difficult to be compatible with organic polymer materials. Therefore, it is necessary to carry out hydrophobic modification on the surface to make ...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/08
Inventor 吕剑明龚国洪马宏相陈蓉芳刘莉
Owner GUIZHOU UNIV
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