Cure Characteristics of Bioplastic Prepolymer during Industrial Manufacturing

概要

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A thermosetting bioplastic is formed by heating a bioplastic prepolymer consisting of glucose and modified MDI (carbodiimide modified 4,4'-diphenyl methane diisocyanate). It formed by hot stamping device had the same quality (bending strength) when compared to phenolic resin. However, the bending strength deteriorated after a long heating treatment. The optimum heating time was around 300 s and the cure ratio reached 60-80% at the average heating temperature of 430 K during an industrial manufacturing process. The cure ratio of the bioplastic prepolymer could be roughly estimated by measuring the change in the color appearance (hue value of microscopic image). Time courses of the cure ratio during heating could be simulated by a kinetic model. Both methods will be useful for process management during production of the thermosetting bioplastic as a replacement for the henolic resin. The results of this study will be very important for the industrial manufacturing of thermosetting bioplastic.