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Physical split phase dynamic polymer and application thereof

A polymer and block polymer technology, applied in the production of bulk chemicals, etc., can solve the problems of cross-linked polymer rigidity, material failure, and inability to reuse, achieve good processing performance, realize self-healing, rich in structure. Effect

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

Examples

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preparation example Construction

[0126] 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

[0194] Commercially available styrene-butadiene-styrene triblock copolymer (SBS), 4-pyridinemethanol and photoinitiator benzyl dimethyl ketal (BDK) were reacted in tetrahydrofuran to keep polybutylene The molar ratio of alkenyl to 4-pyridinemethanol and BDK in the alkene segment is about 50:5:1. After the reaction is complete, add silver nitrate solution to keep the molar ratio of silver ion to pyridyl at about 1:2. The modified SBS of the present invention is obtained. Commercially available SBS, 2-(tert-butoxycarbonyl-amino)ethanethiol and photoinitiator BDK were reacted in tetrahydrofuran to keep alkenyl and 2-(tert-butoxycarbonyl-amino)ethanethiol in the polybutadiene segment The molar ratio of alcohol and BDK is about 50:5:1, and the modified SBS with hydrogen bonding groups in the soft segment is obtained. Take by weighing each 40 parts by mass of two kinds of modified SBS of gained and 20 parts by mass of unmodified commercially available SBS, and 25 parts by mass of n...

Embodiment 2

[0197] 5 molar equivalents of [2,2':6',2"-terpyridine]-5,5"-dimethanol were reacted with 7 molar equivalents of polycaprolactone terminated by carboxyl groups at both ends. Under the catalysis of imine (DCC) and 4-dimethylaminopyridine (DMAP), a polyester chain segment containing a terpyridine skeleton ligand group at both ends is obtained. 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-ended carboxylic acid-terminated polystyrene are mixed, with DCC and DMAP as a catalyst, and methylene chloride as a solvent. After the reaction is complete, zinc chloride solution is added. Keep the molar ratio of zinc ions and ligand groups at about 1:2 to obtain the polystyrene-p...

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Abstract

The invention discloses a physical split phase dynamic polymer, which contains a block polymer molecule. The block polymer molecule contains at least two hard segments, and the hard segments are interconnected by at least one soft segment to form a hard segment-soft segment-hard segment structure in the block polymer molecule. The hard segments can be mutually mixed to and / or independently form crystal phases and / or phases incompatible with the soft segments, thereby forming split phase physical crosslinking points based on the hard segments. All the soft segments of the block polymer moleculeare amorphous, and at least one soft segment contains at least one ligand group, which can form dynamic metal-ligand interaction with a metal center. And the soft segments of the block polymer molecule do not contain secondary amino or hydrogen bond donor group containing secondary amino. 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): C08L53/02C08L25/06C08L31/04C08L75/06C08L83/04C08K3/26C08K3/34C08G81/02C08J9/10C08J9/08
CPCC08G81/021C08G81/027C08J9/08C08J9/103C08J2203/02C08J2203/04C08J2353/02C08J2375/06C08J2383/04C08J2453/02C08L53/025C08L75/06C08L2203/14C08L2205/025C08L2205/035C08L25/06C08L31/04C08K2003/265C08L83/04C08K3/346Y02P20/54
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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