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SBS nanocomposites as toughening agent for polypropylene |
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| Authors: | Patrícia A da Silva Marly M Jacobi Luciane K Schneider Ronilson V Barbosa Paulo A Coutinho Ricardo V B Oliveira Raquel S Mauler |
| Affiliation: | 1. Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gon?alves, Porto Alegre, RS, 9500, Brazil 2. Instituto de Química, Universidade Federal do Paraná (UFPR), Rua XV de novembro, Curitiba, PR, 1299, Brazil 3. Braskem S/A, Triunfo, RS, Brazil |
| Abstract: | The toughening of polypropylene PP] with styrene–butadiene–styrene rubber SBS]/montmorillonite MMT] nanocomposites was investigated with respect to morphological, thermal, and mechanical properties. The MMT/SBS nanocomposites were prepared in an internal mixer, using an epoxidized SBS SBSe] to investigate its effect as a compatibilizer. The MMT/SBS nanocomposite was added to PP up to 10 wt%, aiming at material toughening. Transmission electron microscopy (TEM) revealed MMT induced dispersed-phase reductions when compared to typical PP/SBS blends. In addition, changes in the PP crystallization process were observed in the presence of the nanocomposite. Surprisingly, the use of nanofiller, combined with SBSe compatibilizer agent, increased the PP impact strength by about 60%, with no reduction in the tensile module. |
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