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Modification method of SBS elastomer

An elastomer and modification technology, applied in the field of polymer modification, can solve problems such as complex operation and easy pollution

Pending Publication Date: 2021-05-14
HAIYING ENTERPRISE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the modification methods of SBS include hydrogenation, sulfonation modification, graft modification, in-situ polymerization reaction, blending modification, etc. These methods are relatively complicated to operate and prone to pollution

Method used

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  • Modification method of SBS elastomer
  • Modification method of SBS elastomer

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Embodiment 1

[0021] Under the protection of argon, 5 g of cyclohexane and 50 g of styrene were introduced into the bottle for phase polymerization, the concentration of cyclohexane was about 10%, and the water bath was preheated at 50° C. for 0.5 h. First use a precision syringe to inject a small amount of n-butyllithium to kill impurities, then add 0.5g n-butyllithium to initiate the polymerization of styrene, and react in a water bath at 50°C for 1 hour; after the first stage of polymerization is completed, introduce 5g of cyclohexane under the protection of argon Mixture of alkanes and 50g of butadiene, reacted at 50°C for 3h; after the second-stage polymerization reaction was completed, introduced a mixture of 5g cyclohexane and 50g of styrene under the protection of argon, and reacted in a water bath at 50°C for 1h; after the completion of the third-stage polymerization reaction, cooled To room temperature, first add triisobutyl aluminum in a ratio of 2:1 to the initiator n-butyllithiu...

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Abstract

The invention discloses a modification method of an SBS elastomer, and belongs to the technical field of polymer modification. The method comprises the following steps: under the protection of argon, adding cyclohexane, styrene and n-butyllithium, carrying out a first-stage polymerization reaction at a certain temperature, adding a mixture of cyclohexane and butadiene, carrying out a second-stage polymerization reaction at a certain temperature, adding a mixture of cyclohexane and styrene, carrying out a third-stage polymerization reaction at a certain temperature, performing cooling after the reaction is completed, then adding triisobutyl aluminum, performing stirring until the yellow color fades, then adding a certain amount of ethylene oxide, and continuing the reaction until the reaction is completed. The green synthesis method is simple and rapid in synthesis step, mild in reaction condition and free of toxic and side products, the hydrophilicity and the electrical property of the SBS-PEO block polymer are remarkably improved, the polarity of the SBS-PEO block polymer is greatly improved compared with that of pure SBS, and the higher the PEO content is, the higher the polarity of the polymer is.

Description

technical field [0001] The invention relates to a modification method of SBS elastomer, which belongs to the technical field of polymer modification. Background technique [0002] The thermoplastic elastomer SBS (styrene-butadiene-styrene block copolymer) is currently one of the largest thermoplastic elastomers in the world. It exhibits the elasticity of rubber at room temperature, and has thermoplasticity and tensile properties at high temperatures. , Solubility, skid resistance and low temperature resistance are all excellent, so SBS has important applications in many fields. However, with the continuous improvement of people's performance requirements for materials in production and life, the performance of pure SBS has shown insufficient performance, and the research on SBS modification has attracted widespread attention. Polyethylene oxide (PEO) appears as a chain segment in the polymer structure, and its excellent properties will be transferred to the polymer with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/12C08F297/04
CPCC08G65/12C08F297/04
Inventor 宋道磊
Owner HAIYING ENTERPRISE GROUP