Preparation method of itaconate-butadiene bio-based engineering rubber

A method of preparing bio-based engineering rubber formed by emulsion polymerization of chemically crosslinked itaconate-butadiene copolymers, the method comprising:

• A:
• performing the emulsion polymerization of itaconate and butadiene by:
• mixing itaconate, emulsifier, electrolyte, activator and deionized water in a polymerization reactor,
• closing the polymerization reactor,
• removing air from the polymerization reactor using vacuum-pumping,
• filling the polymerization reactor with nitrogen,
• repeating mixing, closing, removing and filling operations for 1-5 times,
• adding butadiene, deoxidant, and initiator to the polymerization reactor and performing reaction for 5-15 hours in the polymerization reactor under 1-20° C., 0.1-5 Mpa,
• adding a terminator to terminate the reaction and performing demulsification and drying of the terminated reaction via an addition of a demulsifier to obtain a bio-based engineering elastomer raw glue comprising the itaconate-butadiene copolymers, wherein a mass ratio of the itaconate, the butadiene, the emulsifier, the electrolyte, the activator, the deoxidant and the initiator, the terminator and the deionized water is:
• 100:
• 1-100:1-10:0.1-5:0.01-5:0.1-5:0.01-5:
• 1-10:100-1000, a number average molecular weight of the itaconate-butadiene copolymers is about 53000-1640000, a weight-average molecular weight of the itaconate-butadiene copolymers is about 110000-2892000, and a molecular formula of itaconate is:
• wherein R1 and R2 are H or C1-10 alkyl, and R1 R2 are same or different;
• and
• B:
• performing vulcanization process based on the obtained bio-based engineering elastomer using sulfur as a cross-linking agent in a sulfur vulcanizing system under 140-160° C. to prepare the bio-based engineering rubber comprising the itaconate-butadiene copolymers.