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Production of peel montmorillonite/casting nylon nano-composite material

A nano-composite material and casting nylon technology, which is applied in the field of nano-scale dispersion of inorganic montmorillonite without any organicization, can solve the problems of reducing the performance of casting nylon, affecting the molecular weight of MC nylon, and poor dispersion of MMT, and achieving high molecular weight , high strength, high heat distortion temperature effect

Inactive Publication Date: 2007-06-20
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on monomer cast nylon, that is, MC nylon / MMT nanocomposites. The main reason is that MC nylon adopts anionic ring-opening polymerization, and the commonly used MMT is cationic in order to allow caprolactam to enter its sheet. Exchange organic treatment, these organic MMT have obvious polymerization inhibition effect on the anion ring opening system, seriously affect the molecular weight of MC nylon, thereby reducing the performance of cast nylon
However, it is difficult to evenly disperse MMT into the caprolactam monomer without organic treatment, because the specific surface area of ​​montmorillonite is very large, and it is necessary to overcome a large surface energy to open the sheet, so the caprolactam monomer is difficult to obtain. Infiltrated between untreated MMT sheets, resulting in poor dispersion of MMT, unable to exert its own advantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put 5 g of montmorillonite in 500 g of distilled water, stir in a water bath at 80° C. for 2 hours, and let stand for 10 minutes to remove impurities precipitated at the bottom. Then add 1000 g of caprolactam, and sonicate for 2 hours. Most of the water was removed in a rotary evaporator, and the temperature of the water bath was controlled below 90 °C. Then pour it into a three-necked flask, heat it to 140-180°C, and vacuum it for 10-60 minutes (the degree of vacuum is 99331-99997Pa). Add 4% sodium caprolactam and 0.8% 2,4-toluene diisocyanate (TDI), mix evenly, and perform casting, and the mold temperature is controlled at 160-180°C. React for 10-20 minutes and cool in an oven at 50°C. The properties of the prepared montmorillonite / nylon nanocomposite are shown in attached table 1.

Embodiment 2

[0021] Put 10 g of montmorillonite in 100 g of distilled water, stir in a water bath at 80° C. for 2 hours, and let stand for 10 minutes to remove impurities precipitated at the bottom. Then add 1000 g of caprolactam, and sonicate for 2 hours. Most of the water was removed in a rotary evaporator, and the temperature of the water bath was controlled below 90 °C. Then pour it into a three-necked flask, heat it to 140-180°C, and vacuum it for 10-60 minutes, and the vacuum degree is 99331Pa. Add 30g of NaOH and 0.8g of 2,4-toluene diisocyanate (TDI), mix evenly, and perform casting. The mold temperature is controlled at 160-180°C. React for 10-20 minutes and cool in an oven at 50°C. The properties of the prepared montmorillonite / nylon nanocomposite are shown in attached table 1.

Embodiment 3

[0023] Put 15 g of montmorillonite in 1500 g of distilled water, stir in a water bath at 80°C for 2 hours, and let stand for 10 minutes to remove impurities precipitated at the bottom. Then add 1000 g of caprolactam, and sonicate for 2 hours. Most of the water was removed in a rotary evaporator, and the temperature of the water bath was controlled below 90 °C. Then pour it into a three-necked flask, heat it to 140-180°C, and vacuum it for 10-60 minutes, and the vacuum degree is 99680Pa. Add 45g of KOH and 1.2g of N-hexanoyl caprolactam, mix evenly, and perform casting. The mold temperature is controlled at 160-180°C. React for 10-20 minutes and cool in an oven at 50°C. The properties of the prepared montmorillonite / nylon nanocomposite are shown in attached table 1.

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PUM

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Abstract

Production of peeled montmorillonite / cast nylon nanometer composite raw material is carried out by dispersing for montmorillonite in 10-200 time solution, agitating at 80degree for 2hrs, adding into caprolactam, dispersing for 0.5-6hrs, decompress distilling to remove water under 100degree, raising temperature to 140-180degree, supplying pump for 30mins, adding catalyst, activating agent and other auxiliaries into caprolactam proportionally, mixing, casting at 160-180degree, reacting for 10-20mins and cooling at 50degree in oven. It has better strength and modulus, higher molecular weight, crystallinity and heat-deformation temperature and lower shrinkage.

Description

technical field [0001] The present invention relates to a new method for preparing exfoliated montmorillonite / cast nylon nanocomposite material by anionic ring-opening polymerization, in particular to a new method and new formula for inorganic montmorillonite to achieve nanoscale dispersion without any organicization . Background technique [0002] A nanocomposite material refers to a composite material in which the size of the dispersed phase material is less 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. Due to the high strength and hardness of the montmorillonite sheet in the montmorillonite / nylon nanocomposite compared to other materials, the nanocomposite has the characteristics of high strength, high modulus and high barrier properties, so in recent years It...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K3/34C08K5/29C08G69/18
Inventor 刘安栋解廷秀杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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