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Polyamide copolymer/clay nano composite material, its preparing and use

A nanocomposite material and composite material technology, applied in the field of exfoliated polyamide copolymer/clay nanocomposite material and its preparation, can solve the problems of increased film haze, poor film appearance and transparency, and decreased impact toughness of composite materials, etc. Achieve the effect of improving breaking strength and modulus, improving transparency and flexibility, and improving tensile properties

Inactive Publication Date: 2007-08-29
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common shortcomings of the former are: because of the limited intercalation of organic reagents and less intercalation of monomers, the clay sheets in the obtained composite materials cannot be fully peeled off; the impact toughness of the obtained composite materials has declined; When the film is used, the gas barrier performance is limited compared with pure nylon 6, and the appearance and transparency of the film are poor
However, when the composite material is used as a film, the presence of fillers including clay and water-soluble polymers leads to a decrease in film transparency and an increase in film haze
[0005] The above-mentioned patent applications all adopted the kettle-type batch polymerization method when preparing the polyamide / clay nanocomposite material, and the molecular weight of the obtained composite material was low, which could not meet the requirements for film use

Method used

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  • Polyamide copolymer/clay nano composite material, its preparing and use
  • Polyamide copolymer/clay nano composite material, its preparing and use

Examples

Experimental program
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Effect test

Embodiment 1

[0051] (1) Add 2.5 kg of montmorillonite and 0.2 kg of trimethyl phosphate into 25 kg of deionized water with a total capacity of cation exchange of 100meq / 100g, a particle size of 200 mesh, and stir at a high speed for 0.5 hour to obtain the aqueous suspension A of montmorillonite . (2) 0.5 kg of aminocaproic acid, 1.1 kg of octadecyltrimethylammonium bromide, and 0.5 kg of phosphoric acid were dissolved in 50 kg of deionized water to obtain organic solution B. (3) Add B dropwise to A under stirring, keep the temperature at 80° C., stir and react for 6 hours, cool to room temperature naturally, separate and wash by pressure filtration to obtain about 6.25 kg of a filter cake with a water content of 60%. (4) Then, the filter cake, 100kg of caprolactam, 3kg of nylon 66 salt and 40g of adipic acid were stirred and mixed in a melting tank at 90-100°C for 6 hours, and then fed into a storage tank for polymerization. (5) Continuously feed into the pre-polymerization tube, and cond...

Embodiment 2

[0054] (1) Add 5 kg of Ili stone with a total cation exchange capacity of 60 meq / 100 g, a particle size of 200 mesh, and 0.4 kg of trimethyl phosphate into 25 kg of ethanol, and stir at high speed for 0.5 hour to obtain alcohol suspension A of Ili stone. (2) 2kg of caprolactam, 3kg of dioctadecyldimethylammonium chloride, and 0.7kg of hydrochloric acid were dissolved in 50kg of deionized water to obtain organic solution B. (3) Add B dropwise to A under stirring, keep the temperature at 90° C., stir and react for 6 hours, cool to room temperature naturally, separate and wash by pressure filtration to obtain about 10 kg of a filter cake containing 100% water. (4) Then, the filter cake, 100kg of caprolactam, 5kg of nylon 66, and 20g of adipic acid were stirred and mixed in a melting tank at 90-100°C for 6 hours, and then fed into a storage tank for polymerization. (5) Continuously feed into the pre-polymerization tube, and conduct ring-opening polymerization reaction at 270° C. a...

Embodiment 3

[0057] (1) Add 1.5 kg of montmorillonite, 1.5 kg of kaolinite, and 0.24 kg of triethyl phosphate into 25 kg of deionized water with a total capacity of cation exchange of 100meq / 100g and 20meq / 100g, and high-speed stirring for 0.5 hours, an aqueous suspension A of the clay was obtained. (2) 0.3kg of undecyl amino acid, 2.4kg of tri(dodecyl)methyl ammonium bromide, and 0.5kg of sulfuric acid were dissolved in 50kg of deionized water to obtain organic solution B. (3) Add B dropwise to A under stirring, keep the temperature at 100° C., stir and react for 6 hours, cool to room temperature naturally, separate and wash by pressure filtration to obtain about 6 kg of a filter cake containing 50% water. (4) Then, stir and mix the filter cake, 100kg caprolactam, 2kg nylon 66, 1kg laurolactam and 30g acetic acid in a melting tank at 90-100°C for 6 hours, and then discharge them into a storage tank for polymerization. (5) Continuously feed into the pre-polymerization tube, and conduct ri...

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Abstract

The invention relates to a stripping polyamide copolymer / clay nanometer compound material and the manufacture method and the application. It adopts two steps continuous polymerization technology, using polyamide monomer or polyamide polymerization catalyst and long chain zephirol salt compound process clay to make more inserting layer by polymerized catalyst and nanometer to the sheet layer of organic clay, and realizing fully stripping of clay sheet layer in compound material by large scale polymerizing heat and polymer chain. The invention also discloses the manufacture method for polyamide copolymer / clay nanometer compound material and the application to produce plastic membrane.

Description

technical field [0001] The invention belongs to the field of polyamide (nylon) composite materials, in particular to a stripping polyamide copolymer / clay nanocomposite material and its preparation method and application. Background technique [0002] Nylon is a polymer material widely used in fibers, films and engineering plastics, with excellent physical and mechanical properties. Nylon clay nanocomposite material is a high-performance composite material developed for pure nylon with high water absorption rate, low heat distortion temperature, and poor impact resistance in dry state and low temperature. According to the intercalation state of polymer matrix and layered clay sheet, nylon clay nanocomposites can be divided into two types: intercalation type and exfoliation type. The so-called intercalation type refers to the intercalation of polymers into the clay sheets. Although the interlayer distance is significantly increased, there is still interaction between the shee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08G69/14C08G69/16C08K5/521C08J5/18D01F6/90C08K3/34C08K5/19
Inventor 萧耀南李春成张栋毕强昕高明
Owner INST OF CHEM CHINESE ACAD OF SCI
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