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Polyester/lamellar silicate nano composite material and preparation method thereof

A nano-composite material and layered silicate technology, applied in the field of polyester composite materials, can solve the problems of large product limitations, low melt strength, affecting product color and luster, and achieve a wide variable range and good physical and mechanical properties. Effect

Inactive Publication Date: 2004-01-07
CHANGZHOU CHAMGO NANO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the rapid development of new products in recent years, it has also been shown that PET still has some deficiencies in certain properties, for example: (1) Insufficient in air tightness, and the resistance to oxygen, carbon dioxide, etc. cannot reach the quality of beer Require
When it is used to make beer bottles, the oxygen outside the bottle penetrates through the PET bottle wall, causing the beer to oxidize and deteriorate, and the shelf life of beer is short (Mold Manufacturing 2001, 4:31)
(2) When used as PET engineering plastics, the crystallization speed is slow, the melt strength is low, and a high mold temperature is required when processing molded parts (J Appl Polym Sci, 1999, 71: 1139)
However, adding layered silicate to the traditional PET polymerization kettle to produce nanocomposite PET is affected by the complex polymerization production process in the kettle and many factors affecting the polymerization reaction, which greatly changes the original PET polymerization process and reduces production efficiency. The adjustable range of the content of nanometer components is narrow, and the intercalation polymerization can only produce large-scale and single varieties, and the product limitations are large
In addition, the long-term high-temperature polymerization process (250°C-290°C) will also cause the degradation of the layered silicate intercalation agent, thereby affecting the color of the product
[0010] Although the melt mechanical blending method has been widely used in the alloying, blending, and compound modification of polymers, such as the preparation of polymer / polymer alloys, fillers / polymer fillers, glass fiber / polymer reinforcements, etc., the process is simple , strong adjustability and wide applicability, but this method is only used to prepare polyamide / phyllosilicate, polypropylene / phyllosilicate (J Appl Polym Sci, 2000, 78: 1918), poly Nanocomposites such as ethylene / layered silicate, hydroxyphenoxy ether or polyester polymer / layered silicate (Chinese Patent Publication No. CN1212716A), no polyester / layered silicate nanocomposite

Method used

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  • Polyester/lamellar silicate nano composite material and preparation method thereof
  • Polyester/lamellar silicate nano composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1 Add 5 g of montmorillonite with a total cation exchange capacity of 120 meq. / 100 g, add 200 ml of deionized water, stir at high speed for 0.5 hours to disperse evenly, and obtain a stable suspension, then mix 0.6 ml of concentrated hydrochloric acid with 2.6 g of hexadecane Add trimethylammonium bromide to 100ml deionized water, add the latter slowly to the suspension, continue stirring at high speed and raise the temperature to 80°C, centrifuge after 2 hours, discard the supernatant, and redisperse the filter cake in 300ml In ethanol, re-stir, heat up to reflux, add 1g epoxy 628 (Shell company), reflux 1 hour, discard the supernatant after centrifugation, filter cake is air-dried at 50 ℃ for 10 hours, then it is in 80 ℃ vacuum drying for 3 hours, then mixed with 500g PET dried at 120 ℃ for 5 hours at high speed, and blended and granulated with a Φ30 twin-screw extruder to obtain a PET / layered silicate nanocomposite material. In the composite material, the sca...

Embodiment 2

[0031] Example 2 Add 5 g of montmorillonite with a total cation exchange capacity of 120 meq. / 100 g, add 200 ml of deionized water, stir at high speed for 0.5 hours to disperse evenly, and obtain a stable suspension, then mix 0.6 ml of concentrated hydrochloric acid with 2.6 g of hexadecane Add trimethylammonium bromide to 100ml deionized water, add the latter slowly to the suspension, continue stirring at high speed and raise the temperature to 80°C, centrifuge after 2 hours, discard the supernatant, and redisperse the filter cake in 200ml In ethanol, stir again, heat up to 60 ° C, add 0.2 g of silane coupling agent (Z6030 of Dow Corning Company), stir for 1 hour, discard the supernatant after centrifugation, and dry the filter cake at 50 ° C for 10 hours. It was vacuum-dried at 80° C. for 3 hours, then mixed with 500 g of PET dried at 120° C. for 5 hours at high speed, and blended and granulated with a Φ30 twin-screw extruder to obtain a PET / layered silicate nanocomposite mat...

Embodiment 3

[0032] Example 3 First, 10 g of montmorillonite with a total capacity of cation exchange of 100 meq. / 100 g was added to 200 ml of deionized water, stirred at a high speed for 0.5 hours to disperse evenly to obtain a stable suspension, and then 1.0 ml of concentrated hydrochloric acid and 4.2 g of sixteen Add alkyltrimethylammonium bromide to 100ml of deionized water, slowly add the latter into the suspension, continue high-speed stirring and heat up to 80°C, centrifuge after 2 hours, discard the supernatant, and redisperse the filter cake in In 100ml ethanol, stir again, be warming up to reflux, add 1g epoxy 628 (Shell company), 0.2g silane coupling agent (Dow Corning's Z6030), reflux 1 hour, abandon supernatant after centrifugation, filter cake in Blast drying at 50°C for 10 hours, then vacuum drying at 80°C for 3 hours, then mixing with 500g PET dried at 120°C for 5 hours at high speed, blending and granulating with a Φ30 twin-screw extruder to obtain PET / layer silicate nano...

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Abstract

The present invention relates to a kind of polyester / laminate silicate nano composite material and its preparation method. Said preparation method includes the following steps: making organic intercalation agent for silicate and auxiliary treatment agent to make intercalation reaction, then making the above-mentioned material and polyester undergo the process of mechanical melting and co-mixing or melt co-mixing in reactor and dispersing the laminate silicate in the polyester resin base body in nano size so as to obtain the invented nano composite material. Said invented composite material has good physical mechanical property, can be used for making high-choking packaging bottle and packaging bag, and functional fibre, etc.

Description

Technical field: [0001] The invention relates to a polyester composite material, in particular to a nanocomposite material composed of polyethylene terephthalate (PET) and layered silicate. Background technique: [0002] PET is a polymer with excellent comprehensive properties, which can be made into polyester fibers, biaxially oriented films, packaging bottles, engineering plastics and other products, and has a wide range of applications. However, in the rapid development of new products in recent years, it has also been shown that PET still has some deficiencies in certain properties, for example: (1) Insufficient in air tightness, and the resistance to oxygen, carbon dioxide, etc. cannot reach the quality of beer Require. When it is used to make beer bottles, the oxygen outside the bottle penetrates through the PET bottle wall, causing the beer to oxidize and deteriorate, and the shelf life of beer is short (Mold Manufacturing 2001, 4:31). (2) When used as PET engineeri...

Claims

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Application Information

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IPC IPC(8): C08K3/34C08L67/03
Inventor 李毕忠徐绍刚
Owner CHANGZHOU CHAMGO NANO MATERIALS
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