A Transparent, High Refractive, Shape‐Memory, Healable, and Recyclable Phenolic Polyurethane Thermoset: Unexpected Roles of Bromine Substituents and Tertiary Amine Catalysts

2020 ◽  
Vol 221 (5) ◽  
pp. 1900493
Author(s):  
Lu Bai ◽  
Junping Zheng
Keyword(s):  
Shape Memory ◽  
Tertiary Amine ◽  
Amine Catalysts

Asymmetricsyn-Aldol Reaction of α-Hydroxy Ketones with Tertiary Amine Catalysts

2013 ◽  
Vol 2013 (30) ◽  
pp. 6917-6923 ◽  
Author(s):  
Sebastian Baś ◽  
Łukasz Woźniak ◽  
Judyta Cygan ◽  
Jacek Mlynarski
Keyword(s):  
Tertiary Amine ◽  
Aldol Reaction ◽  
Hydroxy Ketones ◽  
Amine Catalysts

Potential Catalysts for the Acetylation of Wood

Holzforschung ◽  
2000 ◽  
Vol 54 (3) ◽  
pp. 269-272 ◽  
Author(s):  
C.A.S. Hill ◽  
N.S. Cetin ◽  
N. Ozmen
Keyword(s):  
Acetic Anhydride ◽  
Tertiary Amine ◽  
Weight Percent Gain ◽  
Weight Percent ◽  
Effective Catalyst ◽  
Rate Of Reaction ◽  
Influence Of Substrate ◽  
Uncatalysed Reaction ◽  
Amine Catalysts

Summary The potential of several tertiary amine catalysts (pyridine, 4-dimethyl-amino pyridine, N-methyl pyrrolidine and N-methyl pyrrolidinone) for the acetylation of Corsican pine sapwood, using acetic anhydride, has been investigated. Rates of reaction were compared with non-catalysed acetylation using acetic anhydride. The hypernucleophile 4-dimethylamino pyridine was found to be the most effective catalyst of those studied. At a concentration of only 1% of the catalyst in acetic anhydride, a weight percent gain of 20% was realised, compared with 7% for the uncatalysed reaction, after 30 minutes system at 100°C. The influence of substrate swelling upon the rate of reaction with wood is discussed.

The Effects of Tertiary Amine Catalysts on Moldability in High Resiliency Foam

1988 ◽  
Vol 24 (3) ◽  
pp. 284-298 ◽  
Author(s):  
S. Arai ◽  
Y. Tamano ◽  
D.W. Lowe
Keyword(s):  
Tertiary Amine ◽  
Amine Catalysts
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