One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； March 9th
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Multiple-choice question: In the polymerization reaction of PVC resin, the degree of alcoholysis of the dispersant polyvinyl alcohol ( ) affects the melting time of the resulting PVC resin ( ). Therefore, more of this dispersant is required to obtain PVC suitable for use in hard sheets. A. Higher and shorter B. Lower and shorter C. Higher and longer D. Lower and longer Answer: C, Higher and longer
In the polymerization reaction of PVC resin, the higher the degree of alcoholysis of the dispersant polyvinyl alcohol used, the longer the melting time of the resulting PVC resin; therefore, more of this dispersant is required to obtain PVC suitable for hard sheets. A. Higher, shorter B. Lower, shorter C. Higher, longer D. Lower, longer