Developments in Ionic Polymers-2

Name: Developments in Ionic Polymers-2
Brand: Springer
SKU: 9789401083607
Price: 277.38 RON
Availability: InStock

Autor: A.D. Wilson, rosser

Limbă:

Legare: Carte broșată

Editura: Springer

Disponibilitate: În depozitul extern

Expediem în 5-8 zile

277.38 lei

Ionic polymers, like elephants, are easier to recognise than to define. Several methods of classific...

Informații despre carte

Autor

A.D. Wilson, rosser

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2011

Pagini

356

EAN

9789401083607

ISBN

9401083606

Enbook ID

02185463

Editura

Springer

Greutate

544

Dimensiuni

152 x 229 x 21

Descriere completă

Ionic polymers, like elephants, are easier to recognise than to define. Several methods of classification have been attempted but none is wholly satisfactory because of the extreme diversity of ionic polymers, which range from the organic, water-soluble polyelectrolytes, through hydrogels and ionomer carboxylate rubbers, to the almost infusible inorganic silicate minerals. For this reason, a general classification is not only difficult, but has minimal utility. However, there are some characteristics of these materials that should be highlighted. The role of counterions is the significant one. These ions, either singly or as clusters, take part in the formation of ionic bonds which have a varying structural role. Often they act as crosslinks, but in the halato-polymers the ionic bonds form an integral part of the polymer backbone itself. Conversely, in polymers contain ing covalent crosslinks, such as the ion-exchange resins, the coun terions have virtually no structural role to play, since they dwell in cage-like structures without affecting the crosslinking, and are readily exchanged. They are, perhaps, best described as ion-containing polymers rather than structural ionic polymers. Another crucial factor is the role of water in ionic polymers. The presence of ionic bonds means that there is a tendency for these materials to interact with water. Where the ionic polymer contains a high proportion of ionic units, it acts as a hydrogel and may be highly soluble. Such interactions with water decrease sharply as the ionic content is reduced, though even then water can act as a plasticiser.

S-ar putea să te intereseze

Clienții care au cumpărat această carte au mai cumpărat și

Cele mai căutate

Categories

Authors

Publishers

Produse

Produse

Cele mai căutate

Categories

Authors

Publishers

Produse

Produse

Developments in Ionic Polymers-2

Informații despre carte

Descriere completă

S-ar putea să te intereseze

Clienții care au cumpărat această carte au mai cumpărat și