Research On Structure And Capability Of 1,2-Polybutadiene With Mo Catalyst System

The polymerization of butadiene was prepared by using A1-Mo-HS (CH₂)₃Si (OCH₃)₃ catalysts.Reviewing the affection factors of polymerization activate and themicrosructure of polymers, such as the feeding order, temperature and time of thepolymerization, the ratio of n(HS(CH₂)₃Si(OCH₃)₃) and n(Mo), and the ratio ofn(Al) and n(Mo) etc. Firstly it shows that under the feeding order ofAl-Mo-HS(CH₂)₃Si(OCH₃)₃ the catalyst was more activated and the relativemolecule weight was a little lower. Secondly the result also shows when the ratioof HS(CH₂)₃Si(OCH₃)₃ and Mo is 1:1, its production's activate and moleculeweight were more lower than the original ratio. Thirdly the retio of n(Al) andn(Mo) has little affection to the polymerization.Using PDMS as the third aspect, this article studies thepolymerization activateusing the molybdenum catalyst system, the polymer molecule weight andmolecule weight distribution, and the polymer microstructure. The result showsthat by using the feeding order of A1-Mo-PDMS, the catalyst actiate is betterthan others, also the polymer molecule weight is a little lower than the Al-Mocatalyst system.After adding the hydrogenation silicon oil to the Al-(m-cresol)-Mo catalyst system, this article review the affection of hydrogenation silicon oil((CHa)aSi-O-[-Si(CH₃)₂O-]-m-[SiCH₃-H] n-Si(CH3)3 to the butadienepolymerization using the molybdenum catalyst system. The polymer moleculeweight is biggest under the hydrogenation silicon oil (m-cresol)-Al-Mo.