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Vinyl polymer nano composite material containing polar side group and preparation method thereof

A technology of vinyl polymers and nanocomposites, which is applied in the field of vinyl polymer nanocomposites and its preparation, can solve the problem that the thermal stability of polymer materials is not obvious, the effect of increasing thermal decomposition temperature is limited, and nano Clay is prone to agglomeration and other problems

Pending Publication Date: 2018-05-29
北京引发科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a certain amount of phyllosilicate to EVOH can improve the gas or water barrier properties of EVOH, but the effect on the thermal stability of polymer materials is not obvious, and it is also related to the type of nanoclay material and the blending method. related
When the amount of nanoclay is large, the nanoclay is easy to agglomerate, which leads to the decrease of the gas barrier property of EVOH
Adding graphene-like substances can improve its physical and mechanical properties and barrier properties, but the processing performance cannot be improved, and the effect on increasing the thermal decomposition temperature is limited, and the elongation at break is reduced

Method used

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  • Vinyl polymer nano composite material containing polar side group and preparation method thereof
  • Vinyl polymer nano composite material containing polar side group and preparation method thereof
  • Vinyl polymer nano composite material containing polar side group and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Dissolve 1g of ethylene-vinyl acetate copolymer (referred to as EVA, ethylene content: 40mol%, number average molecular weight: 36000g / mol) in methanol (mass concentration: 25%), and add 5mol equivalent to the molar number of VA units in EVA % sodium hydroxide / alcohol solution, alcoholysis / saponification reaction at 65°C for 3 hours, to make a vinyl copolymer / methanol solution containing hydroxyl groups in side groups (abbreviation: component A / methanol solution), in which ethylene in component A The content is 40 mol%, and the vinyl alcohol structural unit content is 60 mol%.

[0052] At 60 ° C, the modified nano-montmorillonite (component B, DK2), 2,6-di-tert-butyl-4-methylphenol (component C) and methanol to form a mixed suspension, and further mixed with the above-mentioned components Part A / methanol solution was mixed for 5min to form a low-viscosity suspension containing component A, component B, component C and methanol / water, wherein the mass ratio of component ...

Embodiment 2

[0058] 1g of ethylene-vinyl acetate copolymer (abbreviated as EVA, ethylene content: 37mol%, number average molecular weight: 53000g / mol) was dissolved in methanol (mass concentration: 25%), and 4mol equivalent to the molar number of VA units in EVA was added % sodium hydroxide (catalyst) / alcohol solution, alcoholysis / saponification reaction at 65°C for 3h, forming a vinyl copolymer / methanol solution (abbreviation: component A / methanol solution) containing hydroxyl and ester groups in side groups, wherein The ethylene content in component A is 37 mol%, the vinyl acetate structural unit content is 0.6 mol%, and the vinyl alcohol structural unit content is 62.4 mol%.

[0059] The preparation process of the vinyl polymer nanocomposite material containing polar side groups is the same as that in Example 1, except that the above-mentioned synthesized vinyl copolymer alcohol solution containing hydroxyl and ester groups in the side groups is used to replace DK2 with ten Octyl hydrox...

Embodiment 3

[0064] The preparation process of the vinyl polymer nanocomposite containing polar side groups is the same as in Example 1, except that 4-[(4,6-dioctylthio-1,3,5-triazine-2 -yl)amino]-2,6-di-tert-butylphenol (component C) was first mixed with component A / methanol for 45min, and then mixed with stearyl hydroxyammonium chloride modified montmorillonite (component B , DK0) mixed for 10min. Aftertreatment method is the same as embodiment 1.

[0065] The obtained nanocomposite material takes component A as 100%, the content of component B as 5%, and the content of component C as 0.1%.

[0066] The storage modulus of the prepared nanocomposite at 25°C is 3349MPa, which is 1.1 times higher than that of component A (comparative example 1, 1587MPa) without any additives; Decomposition temperature T d is 267°C, and component A without any additives (T d =256°C) compared to T d Increased by 11°C.

[0067] The prepared nanocomposite melting point is 173°C, and the melting enthalpy i...

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Abstract

The invention provides a vinyl polymer nano composite material containing a polar side group and a preparation method thereof. The nano polymer composite material comprises: a component A which is a vinyl polymer containing the polar side group; a component B which is a layered silicate, modified layered silicate and / or graphene substance; a component C which is an organophenol and / or organic amine compound; wherein the component A is 100% by mass, the component B is 0.1% to 20.0% by mass; and the component C is 0.01% to 1.8% by mass. The component A in a bulk form is melt-blended with the component B and the component C at 170-240DEG C for extruding and granulating, or the component A is mixed with the component B and the component C in a solution form to prepare a suspension. After a solvent is removed, the obtained solid is washed, filtered, and dried to obtain the nano polymer composite material. The thermal stability of the obtained nano-composite material is obviously improved, the problem of high-temperature discoloration of the polymer is effectively solved, and the barrier property of the nano-composite material is also improved.

Description

technical field [0001] The invention relates to the field of polymer nanocomposite materials, more specifically, to a vinyl polymer nanocomposite material containing polar side groups and a preparation method thereof. Background technique [0002] Polyethylene is the largest synthetic resin with excellent processability and use performance, but it is a non-polar molecular chain, and its performance in packaging printing and gas barrier needs to be further improved. Introduce oxygen-containing polar side groups on polyethylene molecular chains for modification, such as polyvinyl acetate, ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl alcohol copolymer, ethylene-vinyl alcohol copolymer, Ethylene-vinyl alcohol-propylene alcohol copolymer or ethylene-vinyl alcohol-propylene alcohol-vinyl acetate-allyl acetate copolymer, etc. Taking ethylene-vinyl alcohol copolymer (EVOH for short) as an example, it combines the excellent processability of ethylene polymer and th...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L29/14C08K9/00C08K9/04C08K3/34C08K5/13C08K5/378C08K5/18C08K5/3437C08F218/08C08F8/00
CPCC08F8/00C08K3/346C08K5/13C08K5/18C08K5/3437C08K5/378C08K9/00C08K9/04C08K2201/011C08L2201/08C08L2201/14C08F218/08C08L29/04C08L29/14
Inventor 吴一弦薛晓贤张树田力
Owner 北京引发科技有限公司
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