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A Novel Approval for Degradation of Polybutadiene and Synthesis of Diene‐Based Telechelic Oligomers via Olefin Cross Metathesis
Author(s) -
Jiang Bin,
Wei Tian,
Zou TingTing,
Rempel Gary L.,
Pan QinMing
Publication year - 2015
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201500004
Subject(s) - polybutadiene , dispersity , monomer , polymer chemistry , acyclic diene metathesis , catalysis , grubbs' catalyst , metathesis , diene , ruthenium , polymerization , chain transfer , salt metathesis reaction , chemistry , dichloromethane , oligomer , degradation (telecommunications) , materials science , solvent , polymer , organic chemistry , copolymer , radical polymerization , telecommunications , natural rubber , computer science
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 °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.