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Method for improving property of thermoplastic polymer material

A thermoplastic polymer and material performance technology, applied in the field of nanocomposite materials, can solve the problems of small particle size, large interface, large surface area, etc., to achieve the effect of improving diffusion speed, improving adsorption, and high hydrothermal stability

Inactive Publication Date: 2007-05-09
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, inorganic nanoparticles have high activity, small particle size, and large surface area, and are easy to aggregate into agglomerates with a size exceeding the order of nanometers; on the other hand, polymer melts generally have high viscosity, and the interface between the inorganic phase and the can be very large, making it difficult for nanoparticles to disperse uniformly in it

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Using a supercritical method, polymer chain monomers of different flexibility and initiators are introduced into the pores of nano-mesoporous silica molecular sieves, and then the polymerization reaction is initiated; take 20nm monodisperse spherical nano-mesoporous MCM-41 3g , styrene (St) 3g, initiator dibenzoyl peroxide (BPO) 0.03g uniformly mixed, and then mixed with MCM-41, and then in CO 2 Pressure is 8MPa, temperature is 35°C, with CO 2 After contacting for 0.5 h, and then initiating monomer polymerization at 120° C. for 6 h, a mesoporous molecular sieve assembled with polystyrene was obtained. Take 50g of PP, 0.25g of mesoporous molecular sieve assembled with polystyrene, and the content of mesoporous molecular sieve assembled with polystyrene is 0.5%. Tough PS-MCM-41 / PP nanocomposite.

[0025] Tensile Strength

Embodiment 2

[0027] Using a supercritical method, polymer chain monomers of different flexibility and initiators are introduced into the pores of nano-mesoporous silica molecular sieves, and then the polymerization reaction is initiated; take 60nm monodisperse spherical nano-mesoporous MCM-41 3g , Methyl methacrylate (MMA) 9g, initiator dibenzoyl peroxide (BPO) 0.27g are evenly mixed, then mixed evenly with MCM-41, and then in CO 2 Pressure is 12MPa, temperature is 45℃, with CO 2 After contacting for 4 hours, and then initiating monomer polymerization at 100° C. for 12 hours, a mesoporous molecular sieve assembled with polymethyl methacrylate was obtained. Take 50g of PP, 0.75g of mesoporous molecular sieve assembled with polymethyl methacrylate, the content of mesoporous molecular sieve assembled with polymethyl methacrylate is 1.5%, melt blending on a twin-screw extruder at 180°C for 7min , to obtain both reinforced and toughened PMMA-MCM-41 / PP nanocomposites.

[0028] Tensi...

Embodiment 3

[0030] Using a supercritical method, polymer chain monomers of different flexibility and initiators are introduced into the pores of nano-mesoporous silica molecular sieves, and then the polymerization reaction is initiated; take 100nm monodisperse spherical nano-mesoporous MCM-41 3g , Mix 12g of butyl methacrylate (BA) and 0.24g of initiator azobisisobutyronitrile (AIBN) evenly, then mix them evenly with MCM-41, and then in CO 2 Pressure is 14MPa, temperature is 55℃, with CO 2 After contacting for 6 hours, and then initiating monomer polymerization at 80° C. for 24 hours, a mesoporous molecular sieve assembled with polybutylmethacrylate was obtained. Take 50g of PP, 2.5g of mesoporous molecular sieve assembled with polybutyl methacrylate, the content of mesoporous molecular sieve assembled with polybutyl methacrylate is 5%, melt blending on a twin-screw extruder at 220°C for 5min , to obtain both enhanced and toughened PBA-MCM41 / PP nanocomposites.

[0031] Tensil...

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Abstract

The invention relates to polymer-base nano composite material by filling molecular sieve assembly macromolecule to improve property. Wherein, using hypercritical method to bring macromolecule chains with different compliance into pore channel of sieve and obtain said filler; then, mixing and fusing with thermalplastic polymer and said filler to prepare objective product. This invention can increase diffusion speed and adsorption of micro molecule in swelling polymer, adjust solvability by changing temperature and pressure, and realizes reaction-separation integration by decompressing.

Description

technical field [0001] The invention relates to nanocomposite material technology, in particular to a method for filling polymer-based nanocomposite materials with mesoporous molecular sieves assembled by polymers to improve the performance of thermoplastic polymer materials. Background technique [0002] Polymer-based inorganic nanocomposites are a new type of functional polymer materials that integrate organic components and inorganic nanocomposites. Due to the combination of the advantages of polymers and inorganic nanomaterials, the economical and effective use of the unique optical, electrical, thermal, magnetic, force, chemical activity, and catalytic properties of nanoparticles has attracted extensive attention from scholars from various countries in recent years. One of the research hotspots in this field. [0003] At present, the commonly used inorganic rigid fillers are mostly nmCaCO 3 , nmSiO 2 , nmTiO 2 Wait. Most of the filled thermoplastic polymer-based co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F4/32C08K9/04C08L77/00C08L23/12C08L23/06C08L27/06
Inventor 张劲松王娜李明天
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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