Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 207
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This post was last edited by ljtjbx on 2015-11-5 at 17:39. Definition: The aging of plastics refers to the phenomenon or process in which, under operating conditions, plastics are exposed to heat, oxygen, sunlight, electricity, etc., leading to changes in the composition and structure of the polymers within them; this results in a deterioration of the plastic’s properties. In other words, during use, plastics gradually lose their elasticity, become harder and more brittle, and develop cracks as a result of exposure to heat, oxygen, sunlight, electricity, etc； Or the plastic gradually loses its rigidity, becomes sticky, and exhibits phenomena such as peristalsis). ( ) Answer: Correct —————————————————— Please note: We will close this thread after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation. Attraction Bonus: 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 + Attraction. 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 and opinions.
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Judgment: The aging of plastics refers to the phenomenon or process in which, under conditions of use, plastics are exposed to heat, oxygen, sunlight, electricity, etc., causing changes in the composition and structure of the polymers within them; this leads to a deterioration in the properties of the plastics. (In other words, during use, under the influence of heat, oxygen, sunlight, electricity, etc., plastics gradually lose their elasticity, become harder and more brittle, and develop cracks.)； Or the plastic gradually loses its rigidity, becomes sticky, and exhibits phenomena such as peristalsis). (V)
The aging of plastics refers to the phenomenon or process in which, under operating conditions, plastics are exposed to heat, oxygen, sunlight, electricity, etc., causing changes in the composition and structure of the polymers within them, which leads to a deterioration in the properties of the plastics. (True)
Judgment: The aging of plastics refers to the phenomenon or process in which, under conditions of use, plastics are exposed to heat, oxygen, sunlight, electricity, etc., causing changes in the composition and structure of the polymers within them; this leads to a deterioration in the properties of the plastics. (In other words, during use, under the influence of heat, oxygen, sunlight, electricity, etc., plastics gradually lose their elasticity, become harder and more brittle, and develop cracks.)； Or the plastic gradually loses its rigidity, becomes sticky, and exhibits phenomena such as peristalsis). (Yes)
The aging of plastics refers to the phenomenon or process in which, under conditions of use, plastics are exposed to heat, oxygen, sunlight, electricity, etc., leading to changes in the composition and structure of the polymers within them; this results in a deterioration of the plastic’s properties. (Or, during use, plastics gradually lose their elasticity, become harder and more brittle, and develop cracks as a result of exposure to heat, oxygen, sunlight, electricity, etc.)； Or the plastic gradually loses its rigidity, becomes sticky, and exhibits phenomena such as peristalsis). (Yes)
ZHENGQUE Correct
The aging of plastics refers to the phenomenon or process in which, under conditions of use, plastics are exposed to heat, oxygen, sunlight, electricity, etc., leading to changes in the composition and structure of the polymers within them; this results in a deterioration of the plastic’s properties. (Or, during use, plastics gradually lose their elasticity, become harder and more brittle, and develop cracks as a result of exposure to heat, oxygen, sunlight, electricity, etc.)； Or the plastic gradually loses its rigidity, becomes sticky, and exhibits phenomena such as peristalsis). (Yes)
The aging of plastics refers to the phenomenon or process in which, under conditions of use, plastics are exposed to heat, oxygen, sunlight, electricity, etc., leading to changes in the composition and structure of the polymers within them; this results in a deterioration of the plastic’s properties. (Or, during use, plastics gradually lose their elasticity, become harder and more brittle, and develop cracks as a result of exposure to heat, oxygen, sunlight, electricity, etc.)； Or the plastic gradually loses its rigidity, becomes sticky, and exhibits phenomena such as peristalsis). (V)
The aging of plastics refers to the phenomenon or process in which, under conditions of use, plastics are exposed to heat, oxygen, sunlight, electricity, etc., leading to changes in the composition and structure of the polymers within them; this results in a deterioration of the plastic’s properties. (Or, during use, plastics gradually lose their elasticity, become harder and more brittle, and develop cracks as a result of exposure to heat, oxygen, sunlight, electricity, etc.)； Or the plastic gradually loses its rigidity, becomes sticky, and exhibits phenomena such as peristalsis). (Yes)
The aging of plastics refers to the phenomenon or process in which, under conditions of use, plastics are exposed to heat, oxygen, sunlight, electricity, etc., leading to changes in the composition and structure of the polymers within them; this results in a deterioration of the plastic’s properties. (Or, during use, plastics gradually lose their elasticity, become harder and more brittle, and develop cracks as a result of exposure to heat, oxygen, sunlight, electricity, etc.)； Or the plastic gradually loses its rigidity, becomes sticky, and exhibits phenomena such as peristalsis). (Yes)