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A novel hydroxyl‐terminated bio‐based engineering elastomer (BEE) was synthesized from four bio‐based monomers by adding excess diol. Then the BEE was chain extended in Haake torque rheometer with 4,4‐diphenyl methane diisocyanate (MDI) as chain extender. The molar ratio of NCO/OH, reaction temperature and reaction time of the chain‐extension reaction were studied, and the optimum condition was determined...
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