A Novel Approval for Degradation of Polybutadiene and Synthesis of Diene-Based Telechelic Oligomers via Olefin Cross Metathesis

作者：Jiang, Bin; Wei, Tian; Zou, Ting-Ting; Rempel, Gary L.; Pan, Qin-Ming^*

来源：Macromolecular Reaction Engineering, 2015, 9(5): 480-489.

DOI：10.1002/mren.201500004

• cross metathesis
• metathetic degradation
• polybutadiene
• ruthenium catalyst
• telechelic oligomers

Metathetic degradation of polybutadiene (PB) in presence of a ruthenium catalyst is accomplished. Well-defined functionalized telechelic PB oligomers with a wide range of designed molecular weights (M-n) and polydispersity indexes (PDI) are achieved via the choice of chain transfer agents (CTAs), mole ratio of PB/CTA, mole ratio of PB/catalyst and the reaction time. Experiments are performed using Grubbs second generation catalyst (G2) in 1,2-dichloromethane at 30 degrees C. It has been demonstrated that the degradation performance can be controllably tuned by using selected monomers. Additionally, when mono-olefins are introduced, the M-n of metathesis products would be on order of a few hundred g mol(-1) with narrow PDI (less than 1.50). The compositions and structures of the final product is determined using GC/MS analysis, which indicates that the butadiene repeating unit number of the telechelic oligomers, could be as low as two or even only one.

• 出版日期2015-10
• 单位苏州大学