Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 183
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This post was last edited by ljtjbx on 2015-10-6 08:36. Multiple choice: The reason why plastics become soft, sticky, and lose their rigidity over time is that the molecules in the plastics undergo （ ）. A. Cross-linking of molecules ； B. Molecular cleavage C. Growth of molecular chains ； D. Reticular structure. Answer: B. Molecular cleavage —————————————————— Please note: We will close this thread after 24 hours, and at that time we will announce the best response (the best help), as well as the answer and explanation. Charisma Reward: Those who post a topic in this section within two days to provide a detailed explanation or discussion on the knowledge points related to this question are asked to reply/comment in this post to inform us, and we will have a moderator award them charisma points. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights.
B........................
The reason why plastics soften, become sticky, and lose their rigidity over time is the occurrence of (B) within the plastic molecules.
B. Molecular cleavage------------------------
The reason why plastics soften, become sticky, and lose their rigidity over time is that the molecules in the plastics undergo ( ). A. Cross-linking of molecules ；
B. Cleavage of molecules. . . . . . . . . . . . .