Nano composite material of anionic polymerization nylon

A nanocomposite material and anionic polymerization technology, applied in the field of modified engineering plastics, can solve the problems of poor modification effect, high cost, uneven dispersion of nylon substrate, etc., and achieve the effect of good rigidity, high strength and high efficiency

Inactive Publication Date: 2003-05-07
ANHUI DOUBLE CRANE PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of uneven dispersion of conventional inorganic fillers on nylon substrates, poor modification effects, and high cost of in-situ intercalation cationic polymerization methods, the present invention provides an anionic polymerized nylon nanocomposite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] 1. Take 5g of nano-calcium carbonate, mix it fully with caprolactam melt at 90°C under the action of stirring force and ultrasonic waves, and age it for about 1 hour, carry out vacuum distillation to remove water for 10 minutes, put in 0.4g catalyst to continue dehydration, Keep the water content below 200PPM to obtain a mixture containing caprolactam anion and nano-calcium carbonate, add 0.5-3g of isocyanate as a co-catalyst, mix quickly and evenly, pour it into a mold preheated at 185°C for polymerization and molding, and obtain nano-calcium carbonate nylon composite products. The product is observed by an electron microscope, which shows that the particle size of calcium carbonate is 50-70nm, and it is uniformly dispersed in the nylon substrate, and its mechanical properties are shown in Table 1.

[0022] 2. 3g of polynanometer silicon dioxide, the process is the same as in Example 1, and its mechanical properties are shown in Table 1.

[0023] 3. Get 4g of nano-lay...

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PUM

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Abstract

A nano-class composite nylon material is prepared through mixing one or more nylon monomers in fused state with one on more nano inorganic material, dewatering, and anionic polymerizing under existance of alkaline catalyst and cocatalyst. Its advantages are high strength, rigidity and size stability, and simple process.

Description

1. Technical field [0001] The invention relates to a modified engineering plastic, specifically an anionic polymerized nylon nanocomposite material. 2. Background technology [0002] Nylon has excellent physical and mechanical properties, especially cast nylon, because of its high molecular weight, its performance is superior. However, due to the effect of the amide polar group of nylon, nylon has high water absorption and poor dimensional stability. The use of inorganic fillers to modify nylon, especially the use of inorganic fillers to modify the surface of the coupling agent, can improve the performance of nylon. However, because the chemical structure and physical state of the filler and nylon are too different, the surface tension between the filler and nylon cannot be completely eliminated, and ideal dispersion and bonding cannot be achieved, which affects the effect of reinforcement modification. [0003] US4739003 discloses a method for preparing polyamide / clay nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/18
Inventor 刘新华郝为祥
Owner ANHUI DOUBLE CRANE PHARMA
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