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Preparation method of epoxidized solution polymerized styrene-butadiene rubber

A technology of solution-polymerizing styrene-butadiene rubber and epoxidation, which is applied in the field of polymer material preparation, can solve the problems of easy agglomeration and poor dispersion of white carbon black, improve compatibility, improve material strength, and solve the problems of resin systems. stable effect

Inactive Publication Date: 2015-03-25
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the emergence of the concept of "green tires", tires are required to have low rolling resistance, high wet skid resistance and excellent wear resistance. At present, SSBR composite materials reinforced with white carbon black can significantly improve wear resistance with low rolling resistance , but silica is easy to agglomerate in the SSBR matrix, resulting in poor dispersion, which has become a major factor restricting the application of silica-reinforced SSBR composites

Method used

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Examples

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Effect test

preparation example Construction

[0009] The preparation of epoxidized solution-polymerized styrene-butadiene rubber is characterized in that the preparation route is as follows:

[0010] (a)

[0011] (b)

[0012] The present invention can be realized by following measures:

[0013] In a container with a stirrer, a reflux condenser, a thermometer and a constant pressure dropping funnel, add the formulated amount of SSBR and an organic solvent (cyclopentane or toluene), stir at room temperature, and heat to the reaction temperature after the SSBR is completely dissolved , add the formula amount of formic acid, drop the formula amount of hydrogen peroxide at a rate of 1ml / min, control the reaction temperature, after the reaction is completed, wash the epoxidized soluble polystyrene-butadiene rubber (ESSBR) with distilled water until neutral , When cyclopentane is used as solvent, evaporate cyclopentane at 70°C; when toluene is used as solvent, precipitate ESSBR with ethanol, and dry it in a vacuum ...

Embodiment 1

[0015] Add 6.034g of SSBR and 85.0ml of toluene into a 500ml container with a stirrer, reflux condenser, thermometer and constant pressure dropping funnel, stir at room temperature, heat to 50°C after SSBR is completely dissolved, add 3.21ml of formic acid, Add 7.64ml of hydrogen peroxide dropwise at a rate of 1ml / min, react at 50°C for 2 hours, wash the ESSBR with distilled water until neutral, precipitate the ESSBR with ethanol, and dry it in a vacuum oven at room temperature to constant weight. After drying, the epoxy degree was measured to be 32.68%.

Embodiment 2

[0017] Add 120.0g SSBR and 1440ml cyclopentane into a 2000ml container equipped with a stirrer, reflux condenser, thermometer and constant pressure dropping funnel, stir at room temperature, heat to 40°C after SSBR is completely dissolved, add 63.8ml formic acid , add 76.0ml of hydrogen peroxide dropwise at a rate of 3ml / min, react at 40°C for 2 hours, wash ESSBR with distilled water until neutral, evaporate cyclopentane at 70°C, and dry in a vacuum oven at room temperature to constant weight. After drying, the epoxy degree was measured to be 14.73%.

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Abstract

The invention discloses a preparation method of epoxidized solution polymerized styrene-butadiene rubber. According to the preparation method, performic acid is generated in situ by H2O2 and HCOOH peracid system under a mild reaction condition, and the performic acid and double bonds on a solution polymerized styrene-butadiene rubber (SSBR) molecular chain undergo epoxidation reaction in an organic phase to obtain the epoxidized solution polymerized styrene-butadiene rubber. Epoxy groups introduced into SSBR have relatively strong reaction activity and can improve the polarity of the SSBR molecular chain, enhance the interaction between the SSBR molecular chain and the packing and improve the compatibility between an SSBR rubber matrix and a reinforcing agent.

Description

technical field [0001] The preparation method of the solution-polymerized styrene-butadiene rubber in-situ oxidized epoxy-styrene-butadiene rubber is realized through the approach of macromolecule chemical reaction, and the invention belongs to the field of preparation of macromolecular materials. Background technique [0002] The introduction of epoxy groups into solution-polymerized styrene-butadiene rubber (SSBR) can increase the polarity of SSBR molecular chains, enhance the interaction with fillers, and improve the compatibility between SSBR rubber matrix and reinforcing agents. One of the main means of high-performance tires. At the same time, the epoxy group has strong reactivity, which provides convenience for the further modification of SSBR, so it is of great significance to study the epoxidation reaction of SSBR. The methods of epoxidation mainly include: peracid method, peroxide method and ketone peroxide method, each of which has its advantages and disadvantage...

Claims

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Application Information

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IPC IPC(8): C08C19/06
Inventor 郭军红常洲杨保平崔锦峰包雪梅周应萍龚光碧谢吉仁赵秋萍慕波李敏睿郭永亮
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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