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Preparation method of ultra-high molecular weight polyethylene/montmorillonite nano composite material

A nano-composite material and ultra-high molecular weight technology, which is applied in the field of preparation of ultra-high molecular weight polyethylene/montmorillonite nano-composite materials, can solve the problems of poor hydrogen response, difficult industrial production, and low bulk density of polymerization products, and achieve polymerization High activity, good mechanical strength and heat resistance, good effect of hydrogen adjustment sensitivity

Inactive Publication Date: 2019-11-12
深圳华世聚合新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst prepared by this technology has poor response to hydrogen, and the bulk density of the polymerization product is low, which is difficult to put into industrial production

Method used

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  • Preparation method of ultra-high molecular weight polyethylene/montmorillonite nano composite material
  • Preparation method of ultra-high molecular weight polyethylene/montmorillonite nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Silanization treatment of montmorillonite

[0035] ① Scatter montmorillonite. Add 100g of sodium montmorillonite and 1g of sodium hexametaphosphate to 1500mL of distilled water, stir and disperse for 2h, and then continue to disperse in a high-speed disperser for 0.5h.

[0036] ② γ-aminopropyltriethoxysilane (APMS) silylated montmorillonite. Take 1g APMS in 10mL1:100 H 2 Stir in the O / ethanol system at room temperature for 2 hours, drop into the dispersed montmorillonite suspension, reflux and stir for 5 hours, filter, dry the filter cake at 120°C for 15 hours, and continue to extract the dried montmorillonite with absolute ethanol Soxhlet 24h to extract the physically adsorbed coupling agent on the montmorillonite.

[0037] (2) Preparation of montmorillonite / magnesium chloride supported titanium tetrachloride catalyst

[0038] 4.76 g (50 mmol) of anhydrous magnesium chloride, 75 ml of decane and 16.3 g (125 mmol) of isooctyl alcohol were heated to 130° C. and a...

Embodiment 2

[0044] (1) Silanization treatment of montmorillonite

[0045] ① Scatter montmorillonite. Add 100g of sodium montmorillonite and 1g of sodium hexametaphosphate to 1500mL of distilled water, stir and disperse for 2h, and then continue to disperse in a high-speed disperser for 0.5h.

[0046] ② γ-aminopropyltriethoxysilane (APMS) silylated montmorillonite. Take 2.5g APMS in 10mL 1:100 H 2 Stir in the O / ethanol system for 2 hours at room temperature, drop into the dispersed montmorillonite suspension, reflux and stir for 5 hours, filter, and dry the filter cake at 120°C for 15 hours. Extract for 24 hours to extract the coupling agent physically adsorbed on the montmorillonite.

[0047] (2) Preparation of montmorillonite / magnesium chloride supported titanium tetrachloride catalyst

[0048] 4.76 g (50 mmol) of anhydrous magnesium chloride, 75 ml of decane and 16.3 g (125 mmol) of isooctyl alcohol were heated to 130° C. and allowed to react for 3 hours to obtain a homogeneous solu...

Embodiment 3

[0054] (1) Silanization treatment of montmorillonite

[0055] ① Scatter montmorillonite. Add 100g of sodium montmorillonite and 1g of sodium hexametaphosphate to 1500mL of distilled water, stir and disperse for 2h, and then continue to disperse in a high-speed disperser for 0.5h.

[0056] ② γ-aminopropyltriethoxysilane (APMS) silylated montmorillonite. Take 5.0g APMS in 10mL 1:100 H 2 Stir in the O / ethanol system for 2 hours at room temperature, drop into the dispersed montmorillonite suspension, reflux and stir for 5 hours, filter, and dry the filter cake at 120°C for 15 hours. Extract for 24 hours to extract the coupling agent physically adsorbed on the montmorillonite.

[0057] (2) Preparation of montmorillonite / magnesium chloride supported titanium tetrachloride catalyst

[0058] 4.76 g (50 mmol) of anhydrous magnesium chloride, 75 ml of decane and 16.3 g (125 mmol) of isooctyl alcohol were heated to 130° C. and allowed to react for 3 hours to obtain a homogeneous solu...

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Abstract

The invention discloses a preparation method of an ultra-high molecular weight polyethylene / montmorillonite nano composite material. The method comprises the following steps: 1) subjecting montmorillonite to surface modification treatment with a silane coupling agent, and dissolving magnesium chloride in a mixed solution of fatty alcohol and fatty hydrocarbon to form a stable solution; 2) adding the modified montmorillonite into the solution, and stirring the mixture to form a suspension; 3) dropwise adding the suspension into titanium tetrachloride for reaction, and filtering, washing and drying the liquid to obtain a catalyst; and 4) under the condition of slurry polymerization or gas-phase polymerization, initiating a catalytic ethylene polymerization reaction by adopting the catalyst to obtain the ultra-high molecular weight polyethylene / montmorillonite nano composite material. In the method, montmorillonite subjected to silanization treatment is added into a magnesium chloride-loaded titanium-series Ziegler-Natta catalyst, so that the magnesium chloride-loaded titanium tetrachloride catalyst can be effectively inserted into the interlayer of montmorillonite, in-situ polymerization of ethylene is realized, and the intercalated ultra-high molecular weight polyethylene / montmorillonite nano composite material is obtained.

Description

technical field [0001] The invention relates to the technical field of organic-inorganic nanocomposite materials, in particular to a method for preparing ultrahigh molecular weight polyethylene / montmorillonite nanocomposite materials. Background technique [0002] The method of in-situ polymerization is to achieve blending in the process of polymerization, which is a kind of microscopic mixing, which is beneficial to improve the compatibility between polymer and montmorillonite. Polyolefin / montmorillonite nanocomposites are prepared by in-situ polymerization, and montmorillonite is generally used as a carrier to support olefin polymerization catalysts. However, because the surface of montmorillonite contains a certain amount of adsorbed water, hydroxyl groups and metal ions, etc., it is necessary to pretreat the montmorillonite. For example, the adsorbed water and some surface hydroxyl groups are removed by high temperature heating, and then the montmorillonite is chemicall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F2/44C08F4/02C08F4/645C08F4/656C08K9/06C08K3/34
CPCC08F110/02C08K9/06C08K3/346C08K2201/011
Inventor 姜涛张凯郭锐
Owner 深圳华世聚合新材料有限公司
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