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Multifunctional polysiloxane thermoplastic elastomer and its preparation method and application

A thermoplastic elastomer and polysiloxane technology, which is applied in the field of thermoplastic elastomers, can solve the problems that composite materials do not have repeatable processing properties, the content of polysiloxane in composite materials should not be too high, and waste of resources, etc., to achieve excellent Effects of thermally induced shape memory function, fast shape recovery rate, and high shape fixation rate

Active Publication Date: 2021-10-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of polysiloxane in the composite material prepared by this method should not be too high; secondly, the composite material does not have reproducibility, resulting in a waste of resources

Method used

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  • Multifunctional polysiloxane thermoplastic elastomer and its preparation method and application
  • Multifunctional polysiloxane thermoplastic elastomer and its preparation method and application
  • Multifunctional polysiloxane thermoplastic elastomer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add 127.55g of octamethylcyclotetrasiloxane (0.43mol), 24.85g of 1,3-bis(3-aminopropyl) to a round bottom flask connected with mechanical stirring, reflux condenser and inert protection device - 0.12 g of 1,1,3,3-tetramethyldisiloxane (0.1 mol) and catalyst tetramethylammonium hydroxide (25% methanol solution). Raise the reaction temperature to 80°C and react for 10h under the protection of nitrogen; then raise the temperature to 150°C and react for 1.2h to decompose the catalyst to obtain a crude product; finally, distill under reduced pressure in a rotary evaporator at 150°C for 2h to remove small molecular substances , to obtain a colorless and transparent double-terminated aminopolysiloxane named APPS-1500.

[0040] (2) Add 3.71g of 3,3',4,4'-biphenyltetracarboxylic dianhydride (12.6mmol) in a double-necked round-bottomed flask equipped with a constant pressure dropping funnel and an inert protection device. 1,3-bis(3-aminopropyl)-1,1,3, The o-dichlorobenzene ...

Embodiment 2

[0043] In addition to 3,3',4,4'-biphenyltetracarboxylic dianhydride, APPS-1500 and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyl The feeding molar ratio of disiloxane is 17.8:10:7, the temperature of hot pressing in step 3 is 90°C, and the rest are the same as in Example 1.

Embodiment 3

[0045] In addition to 3,3',4,4'-biphenyltetracarboxylic dianhydride, APPS-1500 and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyl The feeding molar ratio of disiloxane is 23.1:10:12, the temperature of hot pressing in step 3 is 100°C, and the rest are the same as in Example 1.

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Abstract

The invention discloses a multifunctional polysiloxane thermoplastic elastomer, a preparation method and application thereof. The elastomer is prepared by the following method: 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane and octamethylcyclotetrasiloxane are used as raw materials, Under the action of the catalyst tetramethylammonium hydroxide pentahydrate, the double-ended amino polysiloxane is obtained; Dianhydride and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane are reacted as raw materials to obtain polysiloxane-polyamic acid block copolymer; Finally, under the action of high temperature, a polysiloxane-polyimide block polymer with high mechanical properties, shape memory function and self-healing function is obtained.

Description

technical field [0001] The present invention relates to a thermoplastic elastomer, in particular to a polysiloxane thermoplastic elastomer with high mechanical properties and multifunctionality and a preparation method thereof. The thermoplastic elastomer of the present invention is an intelligent polymer material. The present invention also It relates to the application of polysiloxane thermoplastic elastomer in biomedical devices. Background technique [0002] As a smart material with stimulus-response function, shape memory material can respond to external stimuli (such as temperature, light, electric field and magnetic field, etc.), adjust its own shape, and return to its preset shape. s material. Shape memory polymers have the advantages of low response temperature and fast response speed, and have broad application prospects in aerospace industry, intelligent biomedical equipment, sensors and other fields. The realization of the polymer shape memory function needs to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/455C08G73/10C08L83/10
CPCC08G73/1007C08G73/106C08G73/1082C08G77/455C08L83/10
Inventor 陈玉坤范剑锋
Owner SOUTH CHINA UNIV OF TECH
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