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Functionalized/thermally reversible crosslinked epichlorohydrin rubber and preparation method thereof

The technology of chloroether rubber and chloroethene is applied in the field of thermally reversible cross-linked chloroether rubber and its preparation, which can solve problems such as environmental pollution and achieve the effects of high reactivity, easy regulation and control of structure and composition, and simple and efficient preparation method.

Active Publication Date: 2017-12-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cross-linked structure produced by these two methods is an irreversible structure, so the damaged or discarded epichlorohydrin rubber cannot be reprocessed into a new rubber material like plastic, and a large amount of discarded rubber has caused serious environmental pollution problems.

Method used

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  • Functionalized/thermally reversible crosslinked epichlorohydrin rubber and preparation method thereof
  • Functionalized/thermally reversible crosslinked epichlorohydrin rubber and preparation method thereof
  • Functionalized/thermally reversible crosslinked epichlorohydrin rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, the preparation method of alkylaluminum catalyst

[0020] Under the protection of dry inert gas argon or nitrogen, add triisobutylaluminum (1.0 mmol) toluene solution and phosphoric acid (0.35 mmol) ether solution into the dry deoxygenated reactor, stir at 0°C for 30 minutes, and then Add 1,8-diazabicycloundec-7-ene (DBU, 0.26mmol), stir and react at 40°C for 3 hours to obtain a catalyst for the synthesis of furan and maleimide functionalized polyether materials solution.

Embodiment 2

[0021] Embodiment 2, preparation of furan functionalized chloroether rubber

[0022] Under the protection of dry inert gas argon or nitrogen, add 10ml of toluene, 1.6g of epichlorohydrin, 0.2g of ethylene oxide, and 0.2g of glycidyl furfuryl ether into the dry deoxygenated polymerization reactor, and mix thoroughly Then add the catalyst prepared by the method in Example 1, wherein triisobutylaluminum (0.5mmol) toluene solution and phosphoric acid (0.15mmol) ether solution were reacted at 0°C for 30min, and then DBU (0.12mmol) was added to react at 60°C for 2h; The polymerization reaction solution was stirred and reacted at 60° C. for 2 hours. After the reaction, the polymer was dried by a traditional post-treatment method to obtain 2.0 g of furan-functionalized epichlorohydrin rubber with a conversion rate of 100%. The structure and properties of the product are analyzed as follows: the number average molecular weight is 140,000, the molecular weight distribution is 1.6, and t...

Embodiment 3

[0023] Embodiment 3, preparation of furan functionalized chloroether rubber

[0024] Under the protection of dry inert gas argon or nitrogen, add toluene 10ml, epichlorohydrin 0.64g, oxirane 0.35g, 2-((3-(oxirane- 2 (M) propyl) thio) methyl) furan 0.01g, add the prepared catalyst after thorough mixing, wherein the catalyst is composed of triisobutylaluminum (0.5mmol) toluene solution and phosphoric acid (0.175mmol) ether solution in React at 0°C for 30 minutes, then add DBU (0.13mmol) and react at 60°C for 2h; the polymerization reaction liquid is stirred and polymerized at 40°C for 2h, and after the reaction is completed, the polymer is dried by a traditional post-treatment method to obtain a furan-functionalized chloroether Rubber 1.0g, conversion rate 100%. The structure and properties of the product are analyzed as follows: the number average molecular weight is 70,000, the molecular weight distribution is 1.5, and the glass transition temperature is -40°C.

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Abstract

The invention provides functionalized / thermally reversible crosslinked epichlorohydrin rubber and a preparation method thereof and belongs to the technical field of functional polymer materials. The functionalized epichlorohydrin rubber containing furan and maleimide functional groups is a copolymer of epichlorohydrin, ethylene oxide and an ethylene oxide derivative containing furan or maleimide functional groups under the action of a catalyst, wherein the mass percentage of the functionalized ethylene oxide derivative is 1%-30%; the thermally reversible crosslinked epichlorohydrin rubber is a crosslinking reaction product of functionalized epichlorohydrin rubber containing the furan functional groups and a maleimide reagent containing polyfunctional groups or a crosslinking reaction product of functionalized epichlorohydrin rubber containing the maleimide functional groups and a furan reagent containing polyfunctional groups, and is prepared through a Diels-Alder reaction between furan and maleimide. By introducing the furan and maleimide functional groups into the functionalized epichlorohydrin rubber, thermally reversible crosslinking of the epichlorohydrin rubber is realized, and novel thermally reversible crosslinked epichlorohydrin rubber with self-repair and recyclable capabilities is obtained.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and relates to a class of functionalized epichlorohydrin rubber containing furan and maleimide functional groups and a preparation method thereof, as well as a thermally reversible crosslinked epichlorohydrin rubber based on this and a preparation method thereof . Background technique [0002] Chlorine ether rubber is a polymer material with a main chain of C-O-C and side groups containing chlorine. The unique structure endows it with excellent oil resistance, cold resistance, heat resistance and semi-conductivity. Because of its excellent performance, it has been widely used in transportation, electronic appliances and aerospace fields. Chlorine ether rubber can be divided into epichlorohydrin homopolymer, epichlorohydrin / ethylene oxide binary copolymer, epichlorohydrin / ethylene oxide / allyl glycidyl ether ternary copolymer according to its composition thing. Homopolymer a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/24C08G65/18C08G65/12C08G65/22
CPCC08G65/12C08G65/18C08G65/22C08G65/24
Inventor 郭方李杨邓明牛慧李婷婷侯召民
Owner DALIAN UNIV OF TECH
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