Год выпуска: 2012 Автор: Shaukat Saeed Издательство: LAP Lambert Academic Publishing Страниц: 256 ISBN: 9783659203077
Описание
The presence of pendant hydroxyl groups on the polyimide chains in a polyimide/silica system significantly modifies morphology, enhances compatibility between the phases, reduces silica network size and generates co-continuous networks structures. Compatibilizing power of pendant hydroxyl groups increases significantly when used concurrently with coupling oligomers laden with such functional groups that help in establishing either chemical bonds and/or strong physical interactions. The effect of hydroxyl groups on the silica micro-structures, compatibility, thermal and thermo-mechanical properties is presented in this book. The discussion is based on polyimide/silica and poly(hydroxyl imide)/silica hybrids containing pure as well as organically modified silica network structures prepared through sol-gel process. The link between compatibility enhancement and the origin & concentration of hydroxyl groups has also been explored. This book is useful for academics as well as researchers...
