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In Situ Nanoscale Studies of Liquid Polymerization Reactions in the Manufacture of Polyamides and.Combinatorial Catalysis

Published online by Cambridge University Press:  02 July 2020

Pratibha L. Gai ,
K. Kourtakis  and
S. Ziemecki
Pratibha L. Gai
Affiliation:
DuPont, Central Research and Development Laboratories, Experimental Station, Wilmington, DE, 19880-0356. (Also at the University of Delaware).
K. Kourtakis
Affiliation:
DuPont, Central Research and Development Laboratories, Experimental Station, Wilmington, DE, 19880-0356.
S. Ziemecki
Affiliation:
DuPont, Central Research and Development Laboratories, Experimental Station, Wilmington, DE, 19880-0356.
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Abstract

Low temperature heterogeneous catalytic routes for polymers are of considerable interest in the chemical sciences and technology because they are economical and environmentally beneficial. However such routes have been difficult because of an incomplete understanding of process control and low yields. Currently, hydrogenation of aliphatic dintriles in solvents is used in the chemical industry to manufacture the corresponding diamenes which are subsequently reacted with adipic acid solutions and polymerized to produce the polyamide, nylon (6,6).

Here we report an alternative, low temperature heterogeneous catalytic process for the polymerization reactions using novel environmental-HRTEM (EHREM) in liquid environments. EHREM under simulated reaction conditions provides direct, in situ real-time information on the dynamic structural and chemical changes and reaction modes of operation. We prepared high surface area heterogeneous catalysts including cobalt-ruthenium nanoclusters supported on rutile titania using a single step sol-gel technique, (shown in Fig. 1).

Type
Characterization of Catalysts (Organized by S. Bradley)
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 1060 - 1061
Copyright
Copyright © Microscopy Society of America 2001

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References

references

1.Gai, P.L.et al., Microscopy and Micoanal., 6 (2000)335–342.CrossRefGoogle Scholar
2.Oleshko, V.et al., ProcMSA, (2000)32-33.CrossRefGoogle Scholar
3. We thank Hanna, L.G., Smith, D.L., Wang, L. and Thompson, E.for technical assistance.Google Scholar