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Polymethacrylimide foam/inorganic nano composite material and method for preparing same

A polymethacrylimide and polymethacrylimide matrix technology are applied in the field of polymer foam/inorganic nanocomposite materials to improve physical and mechanical properties and heat resistance, improve strength and thermal deformation temperature, The effect of improving flame retardant properties

Inactive Publication Date: 2008-10-22
NAT UNIV OF DEFENSE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide a polymethacrylimide foam / inorganic nanocomposite material with greater strength, higher heat distortion temperature, and superior comprehensive performance and its Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A polymethacrylimide foam / montmorillonite nanocomposite material, the composite material is based on polymethacrylimide, with montmorillonite as a reinforcing material, polymethacrylimide substrate The mass percentage is 83.7%, the mass percentage of the montmorillonite reinforcing material is 6.7%, and the balance is various additives. The particle size of the montmorillonite is 85nm, and the interlayer distance of the montmorillonite is 2.16nm. The composite material is prepared through the following steps:

[0034] (1) Mix 8 kg of montmorillonite and 0.01 kg of p-tert-butylcatechol with 100 kg of monomers (70 kg of methacrylic acid, 10 kg of methacrylamide and 20 kg of methacrylonitrile), and mix them thoroughly at a temperature of 35°C Use power ultrasonic to disperse montmorillonite evenly to obtain material A;

[0035] (2) Mix the obtained A material with 0.5kg initiator, 10kg foaming agent, 0.2kg divinylbenzene, 0.5kg silicone oil and 0.5kg zinc stearate, stir e...

Embodiment 2

[0042] A polymethacrylimide foam / SiO 2 Nanocomposite material, the composite material is based on polymethacrylimide, with nano-SiO 2 As a reinforcing material, the mass percentage of polymethacrylimide matrix is ​​84.8%, nano-SiO 2 The mass percentage of the reinforcing material is 8.3%, and the balance is various additives, nano-SiO 2 The particle size is 65nm. The composite material is prepared through the following steps:

[0043] (1), 10kg nano-SiO 2 Mix with 0.05kg1, 4-naphthoquinone and 100kg monomer (methacrylic acid 40kg, methacrylamide 30kg, methacrylonitrile 30kg), after stirring, use power ultrasonic to make nano-SiO 2 Disperse evenly to obtain material A;

[0044] (2), the obtained A material was mixed with 1.0kg initiator, 5kg foaming agent, 1.5kg magnesium methacrylate, 2kg silicone oil and 0.1kg calcium stearate, stirred evenly and ultrasonically dispersed for 4 hours to obtain B material; Described 1kg initiator comprises 0.5kg azobis-tert-butyronitrile,...

Embodiment 3

[0051] A polymethacrylimide foam / montmorillonite nanocomposite material, the composite material is based on polymethacrylimide, with montmorillonite as a reinforcing material, polymethacrylimide substrate The mass percentage is 82.3%, the mass percentage of the montmorillonite reinforcing material is 5.3%, and the balance is various additives. The particle size of the montmorillonite is 75nm, and the interlayer distance of the montmorillonite is 2.06nm. The composite material is prepared through the following steps:

[0052] (1), mix 0.65kg montmorillonite and 0.01kg p-hydroxyanisole with 100kg monomers (methacrylic acid 50kg, methacrylamide 25kg, methacrylonitrile 25kg), stir well and then mix them at 35°C Use power ultrasonic to disperse montmorillonite evenly to obtain material A;

[0053] (2), the A material of gained is mixed with 0.2kg initiator, 20kg blowing agent, 0.2kg divinyl benzophenone, 0.5kg Tween-80 and 0.2kg stearic acid amide, stir and ultrasonically disperse...

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Abstract

The invention provides polymethacrylimide foam / inorganic nano-composite material and a preparation method thereof. The composite material takes polymethacrylimide as a base body and inorganic nano-material as reinforcing material. The preparation method is as follows: high-speed stirring and power ultrasound are used to evenly disperse the inorganic nano-material into a system of methacrylic acid, methacrylamide and methacrylonitrile monomers containing auxiliary agents such as evocating agent, vesicant, polymerization inhibitor, cross linker, surfactant, parting agent and so on, the evocating agent evocates copolymerization under certain conditions to form methacrylic acid-methacrylamide-methacrylonitrile copolymer / inorganic nano-composite material with light crosslinking, and the composite material undergoes temperature rising with certain procedures, is foamed at a high temperature and produces an imide ring reaction to produce the polymethacrylimide foam / inorganic nano-composite material. The inorganic nano-material is added, so the mechanical property and the heat resistance of the composite material are apparently improved.

Description

technical field [0001] The invention relates to a polymer foam / inorganic nano composite material, in particular to a polymethacrylimide foam / inorganic nano composite material and a preparation method thereof. Background technique [0002] At present, the polymer foam / inorganic nanocomposite is a composite material in which the inorganic filler is dispersed in the polymer foam matrix at the nanometer scale. At the nanoscale, inorganic reinforcing materials can greatly improve the physical and mechanical properties of materials and increase the heat deformation temperature of materials with a small amount of filling. Polymethacrylimide foams are widely used due to their excellent mechanical properties and high heat resistance, especially as thermal insulation materials and foam core materials for composite materials. At present, there is no successful precedent for using inorganic nanomaterials to enhance polymethacrylimide foam materials. If inorganic nanomaterials can be co...

Claims

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Application Information

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IPC IPC(8): C08L33/24C08K5/21C08F2/44C08F220/06C08J3/24C08J9/04C08K3/34C08K5/09
Inventor 陈一民
Owner NAT UNIV OF DEFENSE TECH
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