维通橡胶是一种耐腐蚀、耐油、耐高温、耐寒性能都特别好的氟橡胶

维通橡胶是一种耐腐蚀、耐油、耐高温、耐寒性能都特别好的氟橡胶。它的结构简式为:

合成它的单体为(    )

A.氟乙烯和全氟异丙烯                        B.1,1-二氟乙烯和全氟丙烯

C.1-三氟甲基-1,3-丁二烯                 D.全氟异戊二烯

答案

解析:分析结构单元主链可以看出,它应是加聚反应的产物。结构单元主链上没有双键,其单体分子中应含一个双键,从主链中间断开,两个碳原子间分别恢复双键,得两分子单体,为CH2=CF2(1,1-二氟乙烯)和CF2=CFCF3(全氟丙烯)。故答案为B。

答案:B


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