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Dynamic polymer with hybrid cross-linked structure and application thereof

A hybrid cross-linking and polymer technology, applied in the field of intelligent polymers, can solve the problems of limited damping effect and fixed structure, and achieve the effect of broad application prospects

Pending Publication Date: 2018-07-31
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively fixed structure, its damping effect is relatively limited.

Method used

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  • Dynamic polymer with hybrid cross-linked structure and application thereof
  • Dynamic polymer with hybrid cross-linked structure and application thereof
  • Dynamic polymer with hybrid cross-linked structure and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0071] In the preparation process of dynamic polymer foaming materials, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[0072] Among them, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer with the help of strong stirring during the preparation of the dynamic polymer to make it a uniform foam, and then through physical Or chemical changes make it gel and solidify to become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0073] Wherein, the physical foaming method is to utilize physical principles to realize the foaming of the polymer in the preparation process of the dynamic polymer, which generally includes the following four methods: (1) inert gas foaming method, that is, after adding Press the inert gas into the molten polymer or pasty mat...

Embodiment 1

[0140] Using 3-(trimethoxysilyl)propyl methacrylate and tris(1,2-propanediol) diacrylate as monomers, the molar ratio of the two is controlled to be 10:1, and it is prepared by free radical polymerization Copolymer of 3-(trimethoxysilyl)propyl methacrylate and tris(1,2-propylene glycol) diacrylate (molecular weight approx. 6600).

[0141] The above copolymer and trimethyl borate according to Si-OCH 3 The molar ratio of the B-OR group and the B-OR group is mixed at 1:1, then add 1.2g of expanded graphite, 0.9g of ammonium polyphosphate, heat up to 80°C and mix well, add 5ml of deionized water, and polymerize under stirring reaction, a dynamic polymer containing common covalent crosslinks and borate-silicate linkages was prepared.

[0142] The polymer product can be used as an energy-absorbing cushioning material and applied to cushioning packaging materials.

Embodiment 2

[0144] The limonene oxide extracted from orange peel is polymerized with 100 psi carbon dioxide under the catalysis of β-diimine zinc to obtain polycarbonate PLimC.

[0145]

[0146] Mix the above-mentioned polycarbonate PLimC with γ-mercaptopropylmethyldimethoxysilane and bis(2-mercaptoethyl) adipate according to the ratio of double bond group and mercapto group at 10:8:2, and add 0.5 wt% AIBN, polycarbonates containing common covalent crosslinks and silanol precursors were prepared by click reaction.

[0147] Take by weighing 24g above-mentioned polycarbonate and 5g tris (2-methoxyethyl) borate that the above-mentioned side group contains the silicon hydroxyl precursor, add the nano-silicon dioxide of 100mg particle diameter 30nm again, fully stir and mix, be heated up to After 80° C., 10 ml of deionized water was added, and polymerization was carried out under stirring to prepare a dynamic polymer containing ordinary covalent crosslinks and silicon borate bonds.

[0148...

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Abstract

The invention discloses a carbon chain / carbon heterochain dynamic polymer with a hybrid cross-linked structure. The dynamic polymer contains common covalent cross-linking and dynamic covalent inorganic silicon borate bonds, wherein the common covalent cross-linking endows the dynamic polymer with certain strength and stability; and the dynamic covalent inorganic silicon borate bonds have good dynamic reversibility, so the dynamic polymer has the functional characteristics of stimulation responsiveness, self repair performance and the like and especially presents good energy-absorbing effect. The dynamic polymer can be extensively used for preparing damping and buffering materials, anti-impact protection materials, self-repairing materials, tough materials, force transducers, etc.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a dynamic polymer with a hybrid cross-linked network composed of ordinary covalent bonds and inorganic borate silicon ester bonds and an application thereof. Background technique [0002] The traditional three-dimensional network structure is generally formed by ordinary covalent cross-linking. However, when only ordinary covalent cross-linking is used, if the cross-linking density is low, the mechanical properties are often poor; and if the cross-linking density is high, the cross-linked polymer is often hard and brittle; and the general chemical cross-linking The link lacks dynamics. Once the chemical cross-link is formed, the cross-link itself cannot be changed, and the properties of the polymer material are fixed. Rubbery cross-linked polymers are often used as damping and shock-absorbing materials because of their good viscoelasticity. However, due to the relatively fix...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08J3/02C08J3/28C08K7/24C08K3/32C08L43/04C08G64/42C08G75/045C08K3/36C08K5/12C08L71/02C08L33/08
CPCC08G64/42C08G75/045C08J3/02C08J3/24C08J3/28C08K3/32C08K3/36C08K5/12C08K7/24C08L33/08C08L71/02C08K2003/323C08K2201/011C08K2201/003C08L43/04
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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