Process for preparing polyolefine/montmorillonite nano non-halogen flame-resisting material

A technology of flame retardant materials and montmorillonite, which is applied in the field of preparation of polyolefin/montmorillonite nano-halogen flame retardant materials, can solve problems such as difficulty in achieving nano-modification effects, poor compatibility, and difficulty in dispersing, and achieve Overcoming the effects of damaging the mechanical properties and processing properties of polyolefins, improving the bending strength, and synergizing the flame retardant properties

Inactive Publication Date: 2005-03-02
SOUTH CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0003] 1. Existing polyolefin non-halogen flame retardant materials obtain flame retardant properties by directly adding non-halogen flame retardants. However, whether it is a phosphorus-nitrogen intumescent non-halogen flame retardant system with high flame retardant Low inorganic non-halogen flame retardant systems, the compatibility between non-halogen flame retardants and polyolefin resins is poor, when the flame retardancy is obtained, the mechanical properties and processing properties of polyolefins have been damaged to varying degrees
[0004] 2. The montmorillonites used in the preparation of existing polymer/montmorillonite nanocomposites are organic montmorillonites modified by organic intercalation agents, although organic montmorillonites can be used in polymers under certain conditions. The preparation of polymer/montmorillonite nanocomposites by forming an intercalation or exfoliation structure can significantly improve the properties of the polym

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Formula 1 of polyolefin / montmorillonite nano-halogen non-halogen flame retardant material:

[0034] Polypropylene (CF-501): 100 grams

[0035] Montmorillonite: 75 grams

[0036] Glycidyl methacrylate: 5 grams

[0037] Dicumyl peroxide (DCP): 0.03 grams

[0038] After mixing the various substances in the above formula evenly with a kneader, knead in a twin-roller plastic mill for 35 minutes in a molten state at 170-190 ° C to obtain a polypropylene / montmorillonite nano-halogen-free flame-retardant material. The content of montmorillonite in the nano-halogen-free flame-retardant material is 41.7%, and the interlayer spacing of montmorillonite increases from 9.7 Å to 14.5 Å, an increase of 4.8 Å, indicating that an intercalation structure is formed. The oxygen index of the non-halogen flame retardant material is 27.4, the bending strength is 48.8MPa, and the notched impact strength is 2.6KJ / m 2 . If the same method is used to replace montmorillonite with a composit...

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Abstract

The present invention relates to the preparation process of nanometer flame retarding non-halogen polyolefin/montmorillonite material. Un-modified montmorillonite and ethylene monomer containing polar radical are made to produce in-situ reaction to form the nanometer flame retarding non-halogen polyolefin/montmorillonite material with intercalation structure. Owing to the blocking effect and nanometer effect of the intercalation structure of montmorillonite, the flame retarding non-halogen material has strengthened flame retarding performance, compensated mechanism and machining performance, and improved compatibility between montmorillonite and polyolefin.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a preparation method of a polyolefin / montmorillonite nanometer non-halogen flame retardant material. Background technique [0002] The existing polyolefin non-halogen flame retardant materials are generally endowed with flame retardant properties by directly adding non-halogen flame retardants; polymer / montmorillonite nanocomposites are generally modified by adding organic intercalants. Montmorillonite, under certain conditions, organic montmorillonite forms an intercalation or exfoliation structure in a polymer to prepare a polymer / montmorillonite nanocomposite material. At present, the advantages and disadvantages of the preparation methods of polyolefin non-halogen flame retardant materials and polymer / montmorillonite nanocomposites are as follows: [0003] 1. Existing polyolefin non-halogen flame retardant materials obtain flame retard...

Claims

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Application Information

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IPC IPC(8): C08K3/34C08K5/521C08L23/02
Inventor 刘芳贾德民吴小华
Owner SOUTH CHINA UNIV OF TECH
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