Evaluation of polypropylene grafted with maleic anhydride and styrene as a compatibilizer for polypropylene/clay nanocomposites |
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Authors: | Jiseon?Lee Jin?Kwang?Kim Email author" target="_blank">Younggon?SonEmail author |
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Affiliation: | (1) Advanced Materials Science and Engineering, College of Engineering, Kongju National University, Cheonan, Chungnam, 331717, South Korea; |
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Abstract: | Among modified Poly(propylene)s (PPs) grafted with polar monomers, PP grafted with maleic anhydride (PP-g-MAH) is known to be the most efficient compatibilizer for PP/clay nanocomposites, since it provides well-dispersed nanostructures
and yields optimal physical properties of the nanocomposites. One drawback of this material, however, is that it becomes brittle
and its viscosity decreases drastically, leading to nanocomposites with low toughness as the graft degree of MAH increases.
Therefore, there is a limitation to increasing both stiffness and toughness of PP/clay nanocomposites with PP-g-MAH. In this study, we investigated the performance of a PP grafted with maleic anhydride and styrene (PP-g-MAH-St) as compatibilizers in PP/clay nanocomposites. It was found that the incorporation of styrene as a comonomer prevents
molecular weight reduction of the PP main chain upon high loading of a radical initiator for high graft degree of MAH. The
compatibilizers (PP-g-MAH-St) thus obtained show good compatibilizing performance in PP/clay nanocomposites. The PP/clay nanocomposites compatibilized
by PP-g-MAH-St show both high stiffness and toughness, which is accomplished by using a compatibilizer of higher viscosity compared
with PP-g-MAH. |
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