Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 139
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Multiple-choice: Among the following polymer materials, which one has a three-dimensional structure? ( ) A. Plexiglass B. Vulcanized rubber C. Polyvinyl chloride D. Polyethylene Answer: B Hint: Natural rubber has a linear structure; after vulcanization, it forms a network structure. Therefore, vulcanized rubber possesses a three-dimensional structure.
B, vulcanized rubber-------------------------
Among the following polymer materials, the one with a three-dimensional structure is (B). A. Acrylic glass B. Vulcanized rubber C. Polyvinyl chloride D. Polyethylene
“B”, select “vulcanized rubber””
Among the following polymer materials, the one with a three-dimensional structure is (B). A. Acrylic glass B. Vulcanized rubber C. Polyvinyl chloride D. Polyethylene
B actively participates and contributes together
The correct answer for the ontology: D. Polyethylene
Among the following polymer materials, the one with a three-dimensional structure is (C). A. Acrylic glass B. Vulcanized rubber C. Polyvinyl chloride D. Polyethylene
The answer should be B. Vulcanized rubber; natural rubber forms a network structure after vulcanization, and this should be considered a three-dimensional structure.