Synthesis, Characterization, and Gas Permeation Properties
Synthesis, Characterization, and Gas Permeation Properties
Synthesis, Characterization, and Gas Permeation Properties
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105<br />
Chapter 3<br />
(2a–c) were in the order DO2 > DN2 > DCO2 > DCH4, the same as for the starting<br />
polymer, ethyl cellulose. Similarly, the S values of 1 <strong>and</strong> 2a–c were observed to<br />
follow the same trend (SCO2 > SCH4 > SO2 > SN2).<br />
Figure 7. Plot of SCH4 vs DCH4 of ethyl cellulose (1) <strong>and</strong> its dendronized<br />
derivatives (2a–c).<br />
It has already been mentioned that the dendronized polymers displayed better<br />
separation performance for various gas pairs, <strong>and</strong> as far as the CO2/N2 separation is<br />
concerned the increase in solubility selectivity is responsible for the enhanced<br />
PCO2/PN2 selectivity. Despite the DCO2/DN2 of 1 being almost unaffected by the<br />
dendron incorporation, the SCO2/SN2 experienced an augmentation probably due to the<br />
interaction of quadrupolar CO2 molecules with the polar dendron appendages.<br />
Conclusions<br />
The present study is concerned with the synthesis of a series of first <strong>and</strong><br />
second generation novel amide-containing dendrons (G1-a-ІІ–G1-c-ІІ <strong>and</strong><br />
G2-a-ІІ–G2-c-ІІ) <strong>and</strong> describes an approach to design new dendritic macromolecules