✦ LIBER ✦

Structure of interpenetrating polymer networks

✍ Scribed by I. Chikina; M. Daoud

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 144 KB
Volume: 36
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(19980715)36:9<1507::aid-polb8>3.0.co;2-g

No coin nor oath required. For personal study only.

✦ Synopsis

A possible model for the formation of interpenetrating polymer networks is suggested. Phase separation is assumed to be faster than gelation. This implies that domains rich in either component grow first until late stages of spinodal decomposition. In these domains, short linear chains are crosslinked, leading to large branched macromolecules. Growth of the domains is slowed down by the presence of crosslinked polymers. It is assumed that it is stopped when the sizes of the domains and of the branched macromolecules are comparable. The resulting domains are significantly larger than the average distance between crosslinks. These results are supported by recent neutron scattering results on a poly(carbonate-urethane)/polyvinyl pyridine interpenetrating network.

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