preparation of functionalized poly(1-butene) from 1,2-poly 66711-86-2 (trans-1,1,1,4,4,4-hexafluoro-2-butene) 2-丁烯-1,4-二醇, 顺反异构体混合物;2-butene-1,4-diol, 98% origin of the particle-size-dependent selectivity in 1-butene ms of trans-1,4-dichloro-2-butene