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Sulfonated SEBS-based rare earth ionomer as well as preparation method and application thereof

An ionomer and sulfonation reaction technology, which is applied in the field of sulfonated SEBS-based rare earth ionomer and its preparation, can solve the problem of reducing PC thermal stability, impact toughness, mechanical strength, ductility, lack of PC catalyzed into carbon cohesive phase Flame retardant effect, poor heat release inhibition performance, etc., to achieve excellent flame retardant effect, inhibit the formation of molten droplets, and improve the effect of fire safety

Active Publication Date: 2021-06-01
浙大宁波理工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently used sulfonates are mainly small molecules, which have poor dispersion and durability in the PC matrix, and will greatly reduce the key indicators of PC such as thermal stability, impact toughness, mechanical strength, and ductility. Heat Release Inhibition Underperformed in Cone Calorimetry Test
The metal counter ions of the currently used sulfonates are almost monovalent alkali metals represented by Na and K. The flame retardant mechanism of PC is mainly concentrated in the gas phase, lacking the condensed phase flame retardant effect on PC catalyzed into char, which undoubtedly reduces Flame Retardant Efficiency

Method used

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  • Sulfonated SEBS-based rare earth ionomer as well as preparation method and application thereof
  • Sulfonated SEBS-based rare earth ionomer as well as preparation method and application thereof
  • Sulfonated SEBS-based rare earth ionomer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method of sSEBS in the present embodiment comprises the following steps:

[0047] (1) Weigh 10g SEBS (47% PS block content, Asahi Kasei P5051) and dissolve it in 120mL DEC, then raise the temperature to 60°C under the protection of nitrogen gas, inject 0.08mol acetyl sulfate at this time, and react for 14h under mechanical stirring, Finally, 6 mL of IPA was added to terminate the sulfonation reaction; DEC and IPA were analytically pure.

[0048] (2) Pour the above reaction system into 1000mL boiling water, volatilize the DEC and precipitate out the precipitate, wash the precipitate with deionized water, filter under negative pressure, and then dry it in a vacuum oven at 70°C to constant weight to obtain sSEBS.

[0049] Depend on figure 1 The infrared spectrum analysis of sSEBS shows that compared with pure SEBS, sulfonic acid groups (SO 3 The characteristic absorption peaks of -O-H and S=O in H) confirm the successful substitution of sulfonic acid grou...

Embodiment 2

[0052] The preparation method of sSEBS in the present embodiment comprises the following steps:

[0053] (1) Weigh 30g SEBS (67% PS block content, Asahi Kasei P2000) and dissolve it in 300mL DEC, then raise the temperature to 55°C under the protection of argon gas, inject 0.3mol sulfonating agent sulfamic acid at this time, and stir mechanically After 18 hours of reaction, 15 mL of IPA was finally added to terminate the sulfonation reaction; DEC and IPA were analytically pure.

[0054] (2) Pour the above reaction system into 1000mL boiling water, volatilize the DEC and precipitate out the precipitate, wash the precipitate with deionized water, filter under negative pressure, and then dry it in a vacuum oven at 80°C to constant weight to obtain sSEBS.

[0055] The infrared spectrum of sSEBS prepared in Example 2 showed the same characteristic peaks as in Example 1, that is, SEBS was successfully sulfonated.

[0056] Example 2 is analyzed by organic elements, and the degree of ...

Embodiment 3

[0058] The preparation method of sulfonated SEBS base rare earth ionomer in the present embodiment comprises the following steps:

[0059] (1) Weigh 10g SEBS (47% PS block content, P5051) and dissolve it in 120mL DEC, then raise the temperature to 60°C under the protection of nitrogen gas, inject 0.08mol acetyl sulfate at this time, react for 14h under mechanical stirring, and finally Add 6mL IPA to terminate the sulfonation reaction; DEC and IPA are analytically pure.

[0060] (2) Add 50ml of cerium acetate aqueous solution gradually to the reaction system of (1) to completely neutralize the sulfonic acid groups. The concentration of cerium acetate in the cerium acetate aqueous solution is 1.5mol / L.

[0061] (3) Pour the reaction system of (2) into 1000mL boiling water, volatilize the DEC and precipitate the precipitate, wash the precipitate with deionized water, filter it with negative pressure, and then dry it in a vacuum oven at 70°C to constant weight to obtain sSEBS -Ce...

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Abstract

The invention provides a preparation method of a sulfonated SEBS-based rare earth ionomer, which comprises the steps of: dissolving SEBS, adding a sulfonating agent to carry out a sulfonation reaction, and adding a terminating agent to the reaction liquid to terminate the reaction; and then adding rare earth metal salt, pouring the whole reaction system into water of which the temperature is greater than or equal to 50 DEG C to obtain a precipitate, and washing and drying the precipitate to obtain the sulfonated SEBS-based rare earth ionomer. The prepared ionomer improves the impact toughness and flame retardant property of PC, and basically maintains the high thermal stability, transparency and mechanical strength of PC.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a sulfonated SEBS-based rare earth ionomer and a preparation method and application thereof. Background technique [0002] Polycarbonate (PC) has been widely used in construction, lighting, aerospace, vehicle engineering, Medical equipment and other fields. In recent years, due to the rise of new technologies such as the Internet of Things, 5G, and artificial intelligence, more and more PCs have emerged in industries such as electronic communications, high-end sensors, smart homes, and driverless vehicles. At present, their growth rate and annual output are among the top five The first of general engineering plastics. However, there are abundant hydrocarbon chains and benzene rings in the molecular chain of PC, which has high flammability and large amount of combustion smoke. Once there is a continuous heat source or open flame, the combustion will spread, and it will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/36C08F297/04C08L69/00C08L53/02
CPCC08F8/36C08L69/00C08L2201/02C08L2201/08C08L2201/10C08F297/04C08L53/025
Inventor 冉诗雅赛霆郭正虹方征平
Owner 浙大宁波理工学院
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