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

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...

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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 / accelerator system commonly used in the industry is vulcanized and cross-linked, and it is difficult to combine with traditional rubber synthesis and processing equipment, and specific synthesis and processing equipment need to be designed separately

[0005] Using the itaconate ester monomer obtained after itaconic acid esterification and purification technology as the main raw material, high molecular weight, low glass transition temperature, and organic Polymers with excellent mechanical properties, especially sulfur-crosslinkable itaconate / isoprene copolymer bioengineering rubber, have not been reported at home and abroad.

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