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nature : the same molecules containing two carbon-carbon double bond compounds known. 2 double bonds by the relative position can be divided into a total of conjugated diene and a total of diolefins. Representative of conjugated diene with 1,3-butadiene and 1,3-isoprene; A representative of non-conjugated diene is 1,4-pentadiene and 1,5-and 1,6-dienes such. A total of conjugated diene addition 1,2 addition polymerization occurred, but more importantly can happen is 1,4-addition polymerization reaction of monomers such Preparation of rubber and thermoplastic elastomer (SBS), an important raw materials; Non-conjugated diene in polymerization, mainly molecular-elements within the pay for the polymerization to form soluble, high melting point with the five yuan or six ring of polymer.
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