One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； August 04th
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Multiple-choice question: When polymerizing polyvinyl chloride resin by suspension polymerization, the methods to increase the apparent density of the resin particles are ( ). A. Increasing the amount of dispersant with a high degree of alcoholysis. B. Slightly raising the reaction temperature in the later stages of the polymerization reaction. C. Increasing appropriately the amount of water added to the polymerization reactor as well as the water-to-oil ratio of the monomers. D. Extending the reaction time appropriately. Answer: ABC
A. Increase the amount of dispersant with a high degree of alcoholysis. B. Slightly raise the reaction temperature in the later stages of the polymerization reaction. C. Increase appropriately the amount of water added to the polymerization reactor as well as the water-to-oil ratio of the monomers
Methods to increase the apparent density of resin particles during the suspension polymerization of polyvinyl chloride resin: (A) A. Increase the amount of dispersant with a high degree of alcoholysis; B. Slightly raise the reaction temperature toward the end of the polymerization process; C. Increase appropriately the amount of water added to the polymerization reactor as well as the water-to-oil ratio of the monomers; D. Extend the reaction time slightly