One question per day; those who answer correctly receive 5 wealth points, and those who participate receive 2 wealth points； Question 259
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Judgment: The viscous flow temperature Tf of polyvinyl chloride (136°C) is very close to its decomposition temperature Td (140°C), with only a difference of 4°C, which poses significant difficulties in processing. Therefore, a plasticizer needs to be added to reduce Tf ； Adding a stabilizer can be considered to increase Td ； Or add both together. ( ) Answer: Correct
The viscous flow temperature Tf of polyvinyl chloride (136°C) is very close to its decomposition temperature Td (140°C), with only a difference of 4°C, which poses significant difficulties in processing. Therefore, a plasticizer needs to be added to reduce Tf ； Adding a stabilizer can be considered to increase Td ； Or add both together. (V)
Correct. . . . . . . . . . .
The viscous flow temperature Tf of polyvinyl chloride (136°C) is very close to its decomposition temperature Td (140°C), with only a difference of 4°C, which poses significant difficulties in processing. Therefore, a plasticizer needs to be added to reduce Tf ； Adding a stabilizer can be considered to increase Td ； Or add both together. (Yes)