By Serban C. Moldoveanu
Analytical Pyrolysis of man-made natural Polymers is a follow-up to Analytical Pyrolysis of ordinary natural Polymers, that is quantity 20 of the sequence. the main target of the booklet is on sensible purposes of analytical pyrolysis in man made natural polymer id and characterization.
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Additional resources for Analytical Pyrolysis Of Synthetic Organic Polymers
4 1. R. H. Nielsen, P. Wisian-Nielson, J. Macromol. Sci. , A16 (1981) 425. 2. S. C. Moldoveanu, Analytical Pyrolysis of Natural Organic Polymers, Elsevier, Amsterdam 1998. 5 POLYMER BLENDS, COMPOSITE MATERIALS, AND ADDITIVES FOR POLYMERS - General aspects It is common in practice to have certain homopolymers or even copolymers mixed together, which modifies some of their characteristics and makes them more suitable for 22 Overview of organic synthetic macromolecules applications. This can be done by mechanically mixing two or more polymers to form a blend.
O---P--O---R, ! N = = P . . . N==P .......... I R phosphonate ester J J N = = I = ..... (DR NR2 NR2 substituted substituted substituted dioxyphosphazene aminooxyphosphazene diaminophosphazene The variety of polymers is very large, and special polymers difficult to classify in any of the above groups also are known. The classification of polymers previously described has been used in this book for the discussion of pyrolysis results. An important class of polymers that is not discussed here is that of chemically modified natural polymers (or semisynthetic polymers).
In this case, the initial decomposition step is followed by other pyrolytic reactions of the smaller molecules generated from the initial compound. Therefore, in the case of a polymer, pyrolysis of both small and large molecules occurs. Besides thermal decompositions, the pyrolysis products may react between themselves, generating new compounds. In some cases even formation of complex condensation products may take place, the result being indicated as char. The char may contain molecules larger than the initial polymer.
Analytical Pyrolysis Of Synthetic Organic Polymers by Serban C. Moldoveanu