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Method for toughening and reinforcing nylon by using new type organic montmorillonite

A montmorillonite, organic technology, applied in the field of organic treatment of new montmorillonite, can solve the problems of reduced notched impact and tensile elongation at break, no strength, decreased material toughness, etc., to achieve high notched impact strength and Elongation at break, effect of high modulus

Inactive Publication Date: 2006-07-05
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The montmorillonite / nylon nanocomposites prepared in this way generally have improved modulus, strength, heat deflection temperature and barrier effect, but the notched impact and tensile elongation at break have significantly decreased, significantly reducing the montmorillonite / nylon The scope of use of nanocomposites, the main factor leading to the reduction of toughness of montmorillonite / nylon nanocomposites is that there is no strong bonding force between montmorillonite and nylon matrix, which leads to a decrease in material toughness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of organomontmorillonite: Dissolve 7 grams of omega-laurolactam in 100 ml of ethanol, add 3 ml of concentrated hydrochloric acid (36w%) and stir. Take 20 grams of sodium montmorillonite (cation exchange capacity CEC = 100mmol / 100g) and dissolve it in 500ml of acetone to swell for 6 hours, pour the ω-laurolactam solution into the montmorillonite suspension and heat, keep the temperature at 60°C and stir After 24 hours, filter and wash until there is no chloride ion, dry in vacuum at 70°C for 22 hours, and grind to 200 mesh.

[0023] Add 1% of the organic montmorillonite prepared by the above method into the caprolactam, pass through high-purity nitrogen and stir for 6 hours, and the temperature is controlled at 110°C. Vacuum for 30 minutes, the vacuum degree is 99997Pa, add 4% sodium caprolactam and 0.6% 2,4-toluene diisocyanate (TDI), mix well, and cast at 180°C. The properties of the prepared montmorillonite / nylon nanocomposite are shown in Table 1.

Embodiment 2

[0025] Same as Example 2, only changing the content of organic montmorillonite to 2%, the performance of the prepared montmorillonite / nylon nanocomposite material is shown in attached table 1.

Embodiment 3

[0027] Same as Example 2, only changing the content of organic montmorillonite to 3%, the performance of the prepared montmorillonite / nylon nanocomposite material is shown in attached table 1.

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PUM

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Abstract

This invention provides a process for producing a new type of organic montmorillonite reinforced nylon, comprising the steps of: swelling the montmorillonite with a polar solvent, then adding an organic solution of the interlayer insertion agent, ªÏ-laurolactam, to obtain organic montmorillonite; adding the organic montmorillonite into hexanolactam and stirring the mixture at 100-120 deg.C for 4-8h under nitrogen atmosphere; vacuum pumping at a vacuum degree of 99331-99997Pa for 15-60min, then adding sodium hexanolactam, 2,4-toluene diisocyanate and other assistants to the mixture for casting or reactive extrusion to obtain the product. The process of this invention produces an interlayer insertion agent that can improve the adhesion between the montmorillonite and the nylon matrix, and the montmorillonite / nylon nanocomposite produced from the interlayer insertion agent treated montmorillonite has high strength, modulus, resistance, impact strength and rupture extension rate.

Description

technical field [0001] The invention relates to a method for intercalation polymerization casting or reactive extrusion manufacturing of a toughened and reinforced montmorillonite / nylon nanocomposite material, in particular to a novel organic treatment method, formulation and process of montmorillonite. Background technique [0002] The so-called nanocomposite material refers to a composite material in which the size of the dispersed phase material is smaller than 100 nm in at least one dimension. Due to the surface effect, volume effect, quantum size effect and macroscopic quantum effect of nanoparticles, the stiffness, strength, toughness and other properties of the polymer matrix will be significantly improved. [0003] The main component of montmorillonite is silicate, and its sheet thickness is only 0.96-2.1nm. When it reaches nanoscale dispersion in the material, the properties of the material will change greatly as mentioned above. Montmorillonite / nylon nanocomposite...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K9/04C08G69/14
Inventor 刘安栋解廷秀杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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