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Unformatted text preview: Thermally treated graphite (graphene) have shown wrinkled topology at the nanoscale and likely resulted in mechanical interlocking with the polymer chains (McAllister, et al. 2007). Ramanathan et al. (2008) reported that 0.05% treated graphite in polymethyl methacrylate (PMMA) offered a nearly 30 o C increase in glass transition temperature of the polymer (Ramanathan, et al. 2008). Furthermore, the addition of only 0.6% functionalized graphene (treated in a mixture of concentrated nitric acid, concentrated sulfuric acid and distilled water) to polyvinyl alcohol (PVA) resulted in an 35 and 45% increase in sample elastic modulus and hardness, respectively (Das, et al. 2009). Recently, increasing attention has been paid to polymer-nanocomposites based on specialty polymers such as fluoropolymer. Fluoropolymer is the polymer comprising significant amount of fluorinated repetition units. It has excellent chemical and heat...
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- Spring '08