Polymer Layered Silicate Nanocomposites: Structure, Morphology, and Properties

Polymer Layered Silicate Nanocomposites: Structure, Morphology, and Properties

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We have also investigated the flammability properties of a series of polymer nanocomposites, containing various Transition Metal Ion (TMI) modified organoclays. The improved fire retardation in nanocomposites with TMI-modified organoclays can be attributed to enhanced carbonaceous char formation during combustion, i.e., charring promoted by the presence of catalytically active TMI. Polymer nanocomposite materials depend not only on the properties of individual components but also on their morphology and interfacial interactions. In polymer nanocomposites, the interfacial interactions are maximized due to the large surface area of the filler particles exposed to the polymer matrix, resulting in unique anisotropic properties. Thus, it will be of great importance to achieve exfoliation of the lamellar stacks prior to mixing with the polymer matrix, in the dry powder state or in a solution state. In layered silicates the lamellar stacks are held by electrostatic interactions between the basal charges and ions present within the basal spacing. Lamellar stacks of layered silicates can be exfoliated if the amount of energy gained by them is higher than the electrostatic energy required to hold the lamellar stacks together. Using 'Microwave radiation', exfoliation of organoclays was achieved. Various characterization techniques were used to evaluate structure, morphology and properties of fillers and polymer nanocomposites.I am indebted to him for supporting me through the course of my doctoral studies at Stony Brook. ... Through my Ph.D. program I am thankful to Dr. Tsou who has helped me with useful insights starting from the beginning years of my PhD.

Title:Polymer Layered Silicate Nanocomposites: Structure, Morphology, and Properties
Publisher:ProQuest - 2008


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