MyJournals Home  

RSS FeedsMechanochemical synthesis of poly(trimethylene carbonate)s: an example of rate acceleration (Beilstein Journal of Organic Chemistry)

 
 

23 april 2019 11:00:10

 
Mechanochemical synthesis of poly(trimethylene carbonate)s: an example of rate acceleration (Beilstein Journal of Organic Chemistry)
 


Abstract Mechanochemical polymerization is a rapidly growing area and a number of polymeric materials can now be obtained through green mechanochemical synthesis. In addition to the general merits of mechanochemistry, such as being solvent-free and resulting in high conversions, we herein explore rate acceleration under ball-milling conditions while the conventional solution-state synthesis suffer from low reactivity. The solvent-free mechanochemical polymerization of trimethylene carbonate using the organocatalysts 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) are examined herein. The polymerizations under ball-milling conditions exhibited significant rate enhancements compared to polymerizations in solution. A number of milling parameters were evaluated for the ball-milling polymerization. Temperature increases due to ball collisions and exothermic energy output did not affect the polymerization rate significantly and the initial mixing speed was important for chain-length control. Liquid-assisted grinding was applied for the synthesis of high molecular weight polymers, but it failed to protect the polymer chain from mechanical degradation. Beilstein J. Org. Chem. 2019, 15, 963–970. doi:10.3762/bjoc.15.93


 
88 viewsCategory: Chemistry
 
[ASAP] RISC: Rapid Inverted-Index Based Search of Chemical Fingerprints (Journal of Chemical Information and Modeling)
[ASAP] Lead-Mediated Highly Diastereoselective Allylation of Aldehydes with Cyclic Allylic Halides (Journal of Organic Chemistry)
 
 
blog comments powered by Disqus


MyJournals.org
The latest issues of all your favorite science journals on one page

Username:
Password:

Register | Retrieve

Search:

Chemistry


Copyright © 2008 - 2024 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Nachrichten