Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 135
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Multiple choice: Rubber is an important industrial raw material. It is an organic polymer compound with good elasticity, but poor strength. To increase the strength of certain rubber products, vulcanization is often required during processing (that is, the rubber raw material is reacted with sulfur under certain conditions) ； The higher the degree of vulcanization of rubber products, the greater their strength, and the poorer their elasticity. Among the following rubber products, which one has a higher degree of vulcanization during processing? ( ) A. Rubber band B. Car tire C. Ordinary balloon D. Medical latex gloves Answer: B
The one with a higher degree of vulcanization during processing is (B. automobile outer tires).
B, automobile outer tire. -----------------
B. Car outer tires!!!!!!!!!!!!!!!!!!!!!!!!!
Answer: B. Explanation: Rubber bands and ordinary balloons have good elasticity, so their degree of vulcanization is low ； Compared to medical latex gloves, automobile tires can withstand greater pressure; therefore, the rubber used to make them is vulcanized to a higher degree.