Dynamic polymer thermoplastic elastomer and application thereof

A thermoplastic elastomer and polymer technology, used in applications, clothing, footwear, etc., can solve the problems of hard and brittle cross-linked polymers, inability to use elastomers, poor mechanical properties, etc. Recovery and reuse, excellent self-healing effect

Active Publication Date: 2018-03-20
厦门逍扬运动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when only physical crosslinking is used, if the crosslinking density is low (the chain between crosslinking points is longer / the functionality of crosslinking points is low), the crosslinked polymer tends to be relatively soft and has poor mechanical properties; However, if the cross-linking density is high (longer chains between cross-linking points / higher cross-linking point functionality), the cross-linked polymer is often hard and brittle, and cannot be used as an elastomer; and in order to maintain the stability of the material The de-crosslinking temperature of physical crosslinking needs to be higher than the working temperature of the material. Therefore, physical crosslinking lacks dynamics at the working temperature of the material.

Method used

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  • Dynamic polymer thermoplastic elastomer and application thereof
  • Dynamic polymer thermoplastic elastomer and application thereof
  • Dynamic polymer thermoplastic elastomer and application thereof

Examples

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preparation example Construction

[0124] A method for preparing a dynamic polymer ionic liquid gel of the present invention comprises the following steps: blending the raw material for preparing the dynamic polymer with the ionic liquid so that the mass fraction of the raw material for preparing the dynamic polymer is 0.5 to 70%, and passing The appropriate means carry out polymerization, coupling or other types of chemical reactions, and after the reaction is completed, a dynamic polymer ionic liquid gel is produced. Another method for preparing a dynamic polymer ionic liquid gel of the present invention comprises the following steps: swelling the dynamic polymer in a solvent containing an ionic liquid so that the mass fraction of the dynamic polymer is 0.5-70%, and after fully swelling In addition to the solvent, a dynamic polymer ionic liquid gel is made. The above-mentioned ionic liquid is generally composed of organic cations and inorganic anions. As an example, the cations are selected from the group con...

Embodiment 1

[0168] Styrene-butadiene-styrene triblock copolymer (SBS), 2-(tert-butoxycarbonyl-amino)ethanethiol, photoinitiator benzyl dimethyl ketal (BDK) in tetrahydrofuran Reaction, keeping the molar ratio of alkenyl and 2-(tert-butoxycarbonyl-amino)ethanethiol and BDK in polybutadiene is about 50:50:1, and obtains polybutadiene segment containing carbamate base modified SBS.

[0169] 100 mass parts of gained modified SBS, 25 mass parts of naphthenic oil, 17 mass parts of light calcium carbonate, 25 mass parts of polystyrene, 8 mass parts of polyvinyl acetate, 2640.8 mass parts of antioxidant, 2 mass parts of zinc oxide part, 1.5 parts by mass of zinc stearate, and 2 parts by mass of AC foaming agent were uniformly mixed, extruded with a screw extruder, then kneaded on an open mill to go out into sheets, and foamed at 170°C and 20MPa for 8 minutes to form.

[0170] Performance and application: tensile strength 10.2MPa, elongation at break 710%; density: 87kg / m 3 ; This foam material ...

Embodiment 2

[0172] Dissolve 2-chlorocyclohexanone in dichloromethane, add m-chloroperoxybenzoic acid (mCPBA) 0.12mol, keep the molar ratio of 2-chlorocyclohexanone and mCPBA at 10:12, and react to obtain α-chloro-ε - caprolactone

[0173] Under anhydrous conditions, dissolve 50 molar equivalents of α-chloro-ε-caprolactone and 100 molar equivalents of ε-caprolactone in toluene, and in 1 molar equivalent of initiator 2,2-dibutyl-2-tin-1 , 3-Dioxetane triggers the reaction at 20 ° C to obtain a polyester-based random copolymer 2a containing chlorine atoms at both ends of the hydroxyl-terminated side group.

[0174] The copolymer 2a whose side group contains chlorine atoms is dissolved in dimethylformamide, and sodium azide with 2 molar equivalents of chlorine atoms is added to react to obtain a copolymer whose side groups contain azide groups.

[0175] Dissolve the copolymer containing azide group in the side group, 2-propargyl-N-butyl carbamate with equimolar equivalent of azido group in t...

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Abstract

The invention discloses a dynamic polymer thermoplastic elastomer. A polymer molecule of the thermoplastic elastomer comprises a multi-segment structure with multiple end segments and a single middlesegment, wherein the end segments are mutually mixed and / or can independently form a crystalline phase and / or a phase incompatible with the middle segment so as to form end segment-based reversible split-phase physical crosslinking; and the middle segment is in a amorphous state, partial chain segments of the middle segment contain at least one side group and / or side hydrogen bond groups on side chains, and the side hydrogen bond groups can form inter-chain supermolecule hydrogen bond dynamic crosslinking. By virtue of the dynamic reversibility of hydrogen bonds, the dynamic polymer thermoplastic elastomer has good tenacity, energy dissipation, self-repairing property and the like and can be widely applied to the fields of self-repairing sealing components, sealants, flexible elastomers and the like.

Description

technical field [0001] The invention relates to a dynamic polymer thermoplastic elastomer, in particular to a dynamic polymer thermoplastic elastomer with a multi-segment polymer molecular structure of multi-end segment-single middle segment. 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 for the development of polymer elastomers because it is especially helpful to improve the processing properties of polymer elastomers. However, when only physical crosslinking is used, if the crosslinking density is low (the chain between crosslinking points is longer / the functionality of crosslinking points is low), the crosslinked polymer tends to be relatively soft and has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L91/00C08L25/06C08L31/04C08K13/02C08K3/26C08K3/22C08K5/098C08J9/10A43B13/04C08G81/02C08G63/91C08G77/388C08F283/02C08F222/06
CPCA43B13/04C08F283/02C08G63/91C08G77/388C08G81/021C08G81/024C08G81/027C08J9/103C08J2203/04C08J2353/02C08J2491/00C08L53/025C08L2203/14C08L2205/035C08L2207/04C08L91/00C08L25/06C08L31/04C08K13/02C08K2003/265C08K2003/2296C08K5/098C08F222/06
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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