Synthesis of stereodiblock polyisoprene consisting of cis-1,4 and trans-1,4 sequences by using a neodymium catalyst: change of the stereospecificity triggered by an aluminum compound
Literature Information
Ryo Tanaka, Kaede Yuuya, Hiroki Sato, Peter Eberhardt, Yuushou Nakayama, Takeshi Shiono
The first example of the synthesis of stereodiblock polyisoprene which consists of cis-1,4 and trans-1,4 sequences was achieved by using a neodymium catalyst. The stereospecificity was controlled by the ratio of Bu2Mg and modified methylaluminoxane (MMAO), and by sequential addition of Bu2Mg and MMAO, a geometrically well-defined stereodiblock polymer was obtained.
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