Hybrid dynamic crosslinking polymer and application thereof

A dynamic cross-linking, polymer technology, applied in the field of smart polymers, can solve the problems of difficult reprocessing, inability to recycle, and the lack of structural dynamic reversibility of ordinary covalent structures.

Pending Publication Date: 2019-04-23
厦门逍扬运动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high bond energy of the covalent cross-linking structure, polymer materials based on this type of cross-linking structure usually have relatively good stability and comprehensive mechanical properties, but due to the lack of dynamic reversibility of the ordinary covalent structure, it is impossible to solve the problem. Problems such as crack failure, poor plasticity, difficulty in reprocessing and inability to recycle and reuse cross-linked polymer materials

Method used

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  • Hybrid dynamic crosslinking polymer and application thereof
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  • Hybrid dynamic crosslinking polymer and application thereof

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preparation example Construction

[0283] In the preparation process of hybrid dynamic cross-linked polymers, three methods of foaming are mainly used: mechanical foaming method, physical foaming method and chemical foaming method.

[0284] 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 shape and become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0285] Wherein, the physical foaming method is to utilize physical principles to realize the foaming of the polymer in the preparation process of the hybrid dynamic crosslinked polymer, which includes but not limited to the following methods: (1) inert gas foaming method , that is, under pressure, the inert gas is pressed into t...

Embodiment 1

[0305] With THF as solvent, AIBN as initiator, hydroxyethyl acrylate and 3-(dimethyl(2-prop-2-enoyloxyethyl)dimethyl)propane-1-sulfonate as monomers , controlling the molar ratio of the initiator to each monomer to be 1:15:15, and obtaining a polyacrylate copolymer through free radical polymerization. Dissolve the above acrylate copolymer and 6-acrylamido caproic acid in THF according to the equimolar ratio of hydroxyl and carboxyl groups, and after the materials are mixed evenly, add DCC and DMAP, and obtain the acrylamide graft modified by esterification. It is a kind of polyacrylate; using stannous octoate as a catalyst, the dihydric mercaptan containing urea group is prepared by reacting 2-hydroxyethanethiol and hexamethylene diisocyanate; take a certain amount of the above-mentioned modified acrylate and two thiol, keep the molar ratio of side group acrylamide group and mercapto group at 1:1, add the above material to 80mL 1-butyl-3-methylimidazolium hexafluorophosphate, ...

Embodiment 2

[0307] Using DBU as a catalyst, 3-hexyn-2-one and 6-aminohexane-1-mercaptan are used as raw materials to prepare diamines through mercapto-Michael addition reaction; using DBU as a catalyst, the molar ratio is 3:1 2-mercaptoethanol reacts with tris (2-(acryloyloxy) ethyl) isocyanurate to obtain a polyol; in No. 1 container, weigh 40.0 g of hydroxyl-terminated polyoxypropylene Diol, heated to 110°C, dehydrated and dried under reduced pressure for 2 hours, then cooled to below 60°C, added 1.9g toluene diisocyanate, 0.6g stannous octoate, controlled temperature at 80°C, stirred and reacted for 2h, cooled to room temperature, NCO can be obtained The mass fraction is about 3.6% of the prepolymer, and then add an appropriate amount of MDI and toluene to obtain the NCO mass fraction of 10% prepolymer (component A); in No. 2 container, take 40 parts of diamine expanded Chain agent, 10 parts of polyol curing agent, 0.4 parts of stannous octoate, 5 parts of diisononyl phthalate, 10 part...

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Abstract

The invention discloses a hybrid dynamic crosslinking polymer. The hybrid dynamic crosslinking polymer contains sulfydryl-Michael addition bond dynamic covalent crosslinking and supermolecular hydrogen bond interaction, wherein the sulfydryl-Michael addition bond dynamic covalent crosslinking reaches above a gel point in at least one crosslinking network; sulfydryl-Michael addition bonds are obtained through sulfydryl-Michael addition reaction between sulfydryl groups and electron-deficient conjugate alkenes/enynes; the supermolecular hydrogen bond interaction involves backbone hydrogen bond groups; with dynamic reversibility, the sulfydryl-Michael addition bonds and the supermolecular hydrogen bonds endow the hybrid dynamic crosslinking polymer with good plasticity, self-repairability, repeatability, reusability and recoverability and ensure that the hybrid dynamic crosslinking polymer can be widely applied to self-repairing materials, flexible materials, shape memory materials, energy storage device materials and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a hybrid dynamic cross-linked polymer and its application. Background technique [0002] Polymer structures can be classified into linear polymers, branched polymers, and crosslinked polymers according to their geometry. Among them, the macromolecules of linear or branched structure are aggregated into polymers by intermolecular forces. This non-crosslinked structural feature endows them with good solubility and processability. However, solvent resistance is often encountered during the use of materials. Poor, poor heat resistance, poor mechanical properties and other issues. In order to obtain more stable material properties, it is usually necessary to transform components such as polymers into a three-dimensional crosslinked network structure through physical crosslinking or chemical crosslinking. Physically cross-linked polymers are generally formed by cross-linking throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/10C08G18/12C08G18/36C08G18/48C08G18/62C08G18/78C08G18/32C09D175/08
CPCC09D175/08C08G18/10C08G18/12C08G18/36C08G18/4825C08G18/6229C08G18/6685C08G18/7825C08G18/3228
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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