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A new easy to use nano clay aerogel master batch prepared by melt mixing process for peeling polymer clay nanocomposites

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Document pages: 14 pages

Abstract: In this study, a new and simple method called nano clay aerogel masterbatch was adopted. This innovative technology is carried out by directly connecting the clay layer to a movable polymer, such as polyethylene glycol (PEG), in order to modify the clay layer through peg clay intercalation and PEG hydrogen bond. Using a small amount of anionic polymer hydrogel (for example, κ- Carrageenan (KC) maintains this state and transforms it into a highly porous and fragile structure by freeze-drying, thus forming the so-called nano clay aerogel masterbatch. Even under high clay loading (55 – 67), the weight percentage of inorganic clay content can be obtained when the nano clay aerogel master PEG and KC are loaded at constant load. The layer spacing of nano clay Gallery increases by about17 Å with the typical lamellar morphology like a house of cards structure. The density values were within 0.108–0.122 g·cm−3. The thermal stabilities were up to 270°C, revealing better thermal stability for melt mixing with the commodity plastics at a high melting temperature. The flowability and processability were certified by the melt flow index (MFI) results. The highest nanoclay loading capacity (67 wt. ) of the achieved nanoclay aerogel masterbatch was selected to prepare PS-clay nanocomposites via a melt-mixing process. The comparative nanocomposites were produced by using organoclay. The results of the X-ray diffraction (XRD) and transmission electron microscopy (TEM) exhibited that the exfoliated morphologies were obtained at all clay contents (1–3 wt. ); however, the intercalated structure was gained by using organoclay. The outstanding transparency and brightness were remarked from the specimens prepared by using the nanoclay aerogel masterbatch. The brownish specimens were observed by using organoclay. The significant improvements of tensile properties, glass transition temperature (Tg), and thermal stability were noticed from the nanocomposites prepared using the nanoclay aerogel masterbatch.

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