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Physical split phase supramolecular dynamic polymer and application thereof

A polymer and supramolecular technology, applied in the field of smart materials, can solve the problems of hard cross-linked polymers, material failure, and inability to be reused, and achieve good processing performance, self-healing, and rich structures.

Pending Publication Date: 2019-01-15
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, when only traditional physical cross-links such as phase separation or crystallization are used, if the cross-link density is low (longer chains between cross-links / lower functionality of cross-links), it tends to cross-link the polymer It is relatively soft and has poor mechanical properties; and if the cross-linking density is high (the chain between cross-linking points is longer / the functionality of cross-linking points is high), it often leads to the cross-linked polymer being hard and brittle, which is easy to break and cause The material fails, and at the working temperature of the material, once it fails, it must be replaced and cannot be reused; and in order to maintain the stability of the material, the de-crosslinking temperature of the physical cross-linking must be higher than the working temperature of the material, so that the physical cross-linking Link lacks dynamics at the operating temperature of the material

Method used

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  • Physical split phase supramolecular dynamic polymer and application thereof
  • Physical split phase supramolecular dynamic polymer and application thereof
  • Physical split phase supramolecular dynamic polymer and application thereof

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preparation example Construction

[0151] A preferred preparation method of a dynamic polymer ionic liquid gel of the present invention includes but is not limited to the following steps: blending the raw materials for preparing dynamic polymers with ionic liquids, so that the mass fraction of raw materials for preparing dynamic polymers is 0.5- 70%, polymerization, coupling or other types of chemical reactions are carried out through the appropriate means, and after the reaction is completed, a dynamic polymer ionic liquid gel is produced. The preferred preparation method of another dynamic polymer ionic liquid gel of the present invention includes but not limited to the following steps: the raw materials of the block polymer and the metal center are swollen in a solvent containing an ionic liquid, and the The mass fraction of the block polymer is 0.5-70%, and after fully swelling, the solvent is removed to form a dynamic polymer ion liquid gel. The block polymer molecule for preparing the ionic liquid gel is ...

Embodiment 1

[0212] Commercially available styrene-butadiene-styrene triblock copolymer (SBS), 4-pyridinemethanol, 2-(tert-butoxycarbonyl-amino)ethanethiol and photoinitiator benzyldimethyl The ketal (BDK) is reacted in tetrahydrofuran, and the molar ratio of alkenyl to 4-pyridylmethanol, 2-(tert-butoxycarbonyl-amino)ethanethiol and BDK in the polybutadiene segment is kept at about 50: 5:5:1, the modified SBS containing both hydrogen bond groups and ligand groups of the present invention was obtained. Commercially available SBS, 4-pyridine mercaptan and photoinitiator BDK were reacted in tetrahydrofuran, keeping the molar ratio of alkenyl in the polybutadiene segment to 4-pyridine mercaptan and BDK being about 50:5:1, After the reaction is complete, silver nitrate solution is added to keep the molar ratio of silver ions to pyridyl groups at about 1:2, and a modified SBS containing only ligand groups in the soft segment is obtained. Commercially available SBS, 2-(tert-butoxycarbonyl-amino)...

Embodiment 2

[0215] Under anhydrous and oxygen-free conditions, ethyl isocyanate was reacted with equimolar equivalents of 1-amino-2,3-propanediol to obtain diol compound 2a with ureido groups in side groups. React 3 molar equivalents of [2,2':6',2"-terpyridine]-5,5"-dimethanol, 5 molar equivalents of compound 2a, and 7 molar equivalents of polycaprolactone terminated by carboxyl groups at both ends. Under the catalysis of dicycloethylcarbodiimide (DCC) and 4-dimethylaminopyridine (DMAP), a polyester chain segment containing a terpyridine skeleton ligand group and a side urea group is obtained at both ends of the hydroxyl group. Using benzoyl peroxide (BPO) as an initiator and mercaptoacetic acid as a chain transfer agent to initiate styrene polymerization at 90-100°C, keeping the molar ratio of initiator, monomer, and chain transfer agent at 1:30:1, to obtain Single carboxyl terminated polystyrene. 1 molar equivalent of the resulting copolymer segment and 2 molar equivalents of single-en...

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Abstract

The invention discloses a physical split phase supramolecular dynamic polymer, which contains a block polymer molecule with hard and soft segments simultaneously. The hard segments of the block polymer molecule can be mutually mixed to and / or independently form crystal phases and / or phases incompatible with the soft segments, thus forming split phase physical crosslinking and / or polymerization based on hard segments, and all the soft segments of the block polymer molecule are amorphous. At least one soft segment of the block polymer molecule contains at least one ligand group, which can form dynamic metal-ligand interaction with a metal center. Moreover, at least one soft segment of the block polymer molecule contains at least one hydrogen bond group with hydrogen bond donor and hydrogen bond receptor simultaneously, and the hydrogen bond group forms a dynamic hydrogen-bond interaction. The dynamic polymer has shape memory function, self-repair function and super-toughness, and has wide application in biomedical materials, military, aerospace, energy, construction and other fields.

Description

technical field [0001] The invention relates to an intelligent material, in particular to a dynamic polymer containing physical phase separation crosslinking and dynamic supramolecular action. Background technique [0002] Cross-linking is a general method for polymers to form a three-dimensional network structure to achieve effects such as improving polymer elasticity, thermal stability and mechanical properties. Crosslinking can be chemical (covalent) or physical (non-covalent / supramolecular) crosslinking. Physical crosslinking has become a direction of polymer development because it is especially helpful to improve the processing properties of polymers. However, when only traditional physical cross-links such as phase separation or crystallization are used, if the cross-link density is low (longer chains between cross-links / lower functionality of cross-links), it tends to cross-link the polymer It is relatively soft and has poor mechanical properties; and if the cross-l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08L53/02C08K3/26C08G81/02
CPCC08G81/021C08G81/027C08G83/008C08L53/02C08L2203/14C08K2003/265C08L2205/025C08L2205/035C08L53/025C08K3/26
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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