Itaconate/isoprene copolymer type bio-based engineering elastomer and preparation method thereof

A technology of itaconate and isoprene, which is applied in the field of itaconate/isoprene copolymer bioengineering rubber and its preparation, can solve the problem of low glass transition temperature, high viscosity, inability to vulcanize cross-linking Link and other issues to achieve the effect of reducing energy consumption

Active Publication Date: 2012-07-11
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyester-based bioengineering rubber also has the following deficiencies: 1. The molecular weight of the raw rubber is low (the number average molecular weight is 19800-55000, and the weight-average molecular weight is 88610-222500), resulting in high viscosity, and the mixed material needs to be mixed. , it is difficult to process with an open mill; 2. The preparation method is condensation polymerization, which requires high vacuum and high temperature (220°C) to prepare, and the energy consumption is high; 3. It needs to be cross-linked with peroxide and cannot pass through rubber The sulfur/accelerat

Method used

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  • Itaconate/isoprene copolymer type bio-based engineering elastomer and preparation method thereof
  • Itaconate/isoprene copolymer type bio-based engineering elastomer and preparation method thereof
  • Itaconate/isoprene copolymer type bio-based engineering elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 52.04 grams (0.4mol) of itaconic acid, 73.71 grams (1.6mol) of ethanol, 15.6 grams (0.185mol) of cyclohexane , 0.368 gram (0.00376mol) the concentrated sulfuric acid of mass concentration 98% and 0.0104 gram hydroquinone, be warming up to 120 ℃ under stirring condition, esterification reaction 3 hours, obtain the mixture that contains itaconate. The mixture was then washed with deionized water in a separatory funnel and distilled under reduced pressure at 300 Pa. Collect 140~145°C distillate, which is diethyl itaconate monomer.

[0033] In a 1-liter reactor, add 90 grams of the above-mentioned diethyl itaconate monomer, 10 grams of isoprene, 5 grams of sodium lauryl sulfate, 5 grams of OP-10 emulsifier, 2 grams of sodium bicarbonate, Pressurize to 0.5MPa, pre-emulsify for 1 hour. Then, 0.7 g of ammonium persulfate was added into the reactor, the temperature was raised to 70° C., and the reaction was carried out for 24 hours to obtain a diethyl itaconate / isoprene c...

Embodiment 2

[0036] Add 52.04 grams (0.4mol) of itaconic acid, 73.71 grams (1.6mol) of ethanol, 15.6 grams (0.185mol) of cyclohexane , 0.368 grams (0.00376mol) of concentrated sulfuric acid with a mass concentration of 98% and 0.0104 grams of hydroquinone were heated up to 120° C. under stirring conditions, and esterified for 3 hours to obtain a mixture containing itaconate monomers. The mixture was then washed with deionized water in a separatory funnel and distilled under reduced pressure at 300 Pa. Collect 140~145°C distillate, which is diethyl itaconate monomer.

[0037] In a 1-liter reactor, add 80 grams of the above-mentioned diethyl itaconate monomer, 20 grams of isoprene, 5 grams of sodium dodecylsulfonate, 5 grams of OP-10 emulsifier, and 2 grams of sodium bicarbonate , pressurized to 0.5MPa, and pre-emulsified for 1 hour. Then, 0.7 g of potassium persulfate was added to the reactor, the temperature was raised to 70° C., and the reaction was carried out for 24 hours to obtain a ...

Embodiment 3

[0040] Add 52.04 grams (0.4mol) of itaconic acid, 96.16 grams (1.6mol) of propanol, 15.6 grams (0.185mol) of cyclohexane Alkanes, 0.368 grams (0.00376mol) of concentrated sulfuric acid with a mass concentration of 98% and 0.0104 grams of hydroquinone were heated up to 120° C. under stirring conditions, and esterified for 3 hours to obtain a mixture containing itaconate monomers. The mixture was then washed with deionized water in a separatory funnel and distilled under reduced pressure at 300 Pa. Collect 157~160℃ distillate, which is dipropyl itaconate monomer.

[0041] In a 1-liter reactor, add 90 grams of the above-mentioned dipropyl itaconate monomer, 10 grams of isoprene, 5 grams of sodium lauryl sulfate, 5 grams of OP-10 emulsifier, 2 grams of sodium bicarbonate, Pressurize to 0.5MPa, pre-emulsify for 1 hour. Then, 0.7 g of ammonium persulfate was added into the reactor, the temperature was raised to 70° C., and the reaction was carried out for 24 hours to obtain a dipr...

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Abstract

The invention relates to an itaconate/isoprene copolymer type bio-based engineering elastomer and a preparation method thereof. Itaconic acid, aliphatic monohydric alcohol and isoprene are used as raw materials; an aliphatic copolymer of which the number-average molecular weight is between 52500 to 502563 and the weight-average molecular weight is between 135230 to 1503263 is synthesized through a method of firstly preparing an itaconate monomer and then copolymerizing the itaconate monomer with isoprene emulsion; and then the itaconate-isoprene copolymer type bio-based engineering elastomer is manufactured through chemical cross-linking. The cross-linking process can be realized through a traditional sulphur-accelerator system, and intensifiers (such as carbon black and white carbon black) can be further added, so as to improve the mechanical performance.

Description

Technical field: [0001] The invention relates to an itaconate / isoprene copolymer bioengineering rubber and a preparation method thereof, in particular to a preparation method of an engineering rubber based on a renewable resource itaconic acid as a main raw material. Background technique: [0002] Today, when energy, resources and the environment are severely challenged, the chemical industry, which consumes a large amount of energy and resources, is facing a severe test. Making full use of renewable resources and reducing dependence on non-renewable fossil resources such as petroleum is of great significance to promoting the sustainable development of the global economy. The transition from fossil resources to renewable raw materials is the biggest challenge and development opportunity that people will face in the next 50 years. [0003] The concept of bioengineering rubber (Bio-based Engineering Elastomer) was first proposed by Beijing University of Chemical Technology un...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08L35/02C08K3/06C08F222/14C08F236/08C08F2/24
Inventor 张立群王润国姚慧周鑫鑫雷巍巍王朝康海澜陈雨舟花国智约瑟夫.库里格
Owner BEIJING UNIV OF CHEM TECH
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