Test Method for Carboxyl End Group Content of Polyethylene Terephthalate (PET) Yarns

2007 ◽  
Author(s):  
Keyword(s):  
Polyethylene Terephthalate ◽  
Test Method ◽  
Group Content ◽  
End Group

New catalysts for the synthesis of highly reactive polyisobutylene: chloroaluminate imidazole-based ionic liquids in the presence of diisopropyl ether

2016 ◽  
Vol 7 (36) ◽  
pp. 5615-5619 ◽  
Author(s):  
Irina V. Vasilenko ◽  
Ivan A. Berezianko ◽  
Dmitriy I. Shiman ◽  
Sergei V. Kostjuk
Keyword(s):  
Ionic Liquids ◽  
Reaction Temperature ◽  
Monomer Concentration ◽  
Diisopropyl Ether ◽  
Group Content ◽  
High Reaction ◽  
Highly Reactive Polyisobutylene ◽  
End Group

The use of [emim]Cl–AlCl3 in combination with iPr2O allowed the synthesis of HR PIB with high exo-olefin end group content (≥90%) and a relatively narrow MWD (Mw/Mn ≤ 2.0) at a high reaction temperature (>0 °C) and monomer concentration (5.2 M–7.8 M).

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