PROPRIEDADES MECÂNICAS E MORFOLOGIA DE MISTURAS DE POLIPROPILENO E AMIDO TERMOPLÁSTICO
Resumo
No presente trabalho, a morfologia e as propriedades mecânicas de misturas PP/amido termoplástico (TPS) foram avaliadas. As misturas foram processadas em extrusora dupla rosca co-rotacional. O teor de amido presente nas misturas foi de 10, 20 e 30% (m/m). A resistência à tração do PP mostrou uma queda muito pequena com a adição do TPS, enquanto o módulo elástico não sofreu variação. O alongamento na ruptura decaiu com o aumento do teor de amido, devido à pobre interação interfacial entre a matriz hidrofóbica e a fase dispersa hidrofílica. A incorporação de amido na matriz de PP conduziu a um aumento significativo na resistência ao impacto do material final. A microscopia eletrônica de varredura confirmou a falta de interação interfacial entre as fases presentes na mistura.Referências
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2. OZKOC, G., KEMALOGLU, S. (2009) Morphology, biodegradability, mechanical, and thermal properties of nanocomposite films based on PLA and plasticized PLA. Journal of Applied Polymer Science, 114, 2481-2487. doi: 10.1002/app.30772
3. NAMPOOTHIRI, K. M., NAIR, N. R., JOHN, R. P. (2010). An overview of the recent developments in polylactide (PLA) research. Bioresource Technology, 101, 8493-8501. doi: 10.1016/j.biortech.2010.05.092
4. GAMEZ-PEREZ, J., NASCIMENTO, L., BOU, J. J., FRANCO-URQUIZA, E., SANTANA, O. O., CARRASCO, F., MASPOCH, L. (2011). Influence of crystallinity on the fracture toughness of poly(lactic acid)/montmorillonite nanocomposites prepared by twin-screw extrusion. Journal of Applied Polymer Science, 120, 896-905. doi: 10.1002/app.33191
5. ZHANG, Q. -X., YU, Z. -Z., XIE, X. -L., NAITO, K., KAGAWA, Y. (2007). Preparation and crystalline morphology of biodegradable starch/clay nanocomposites. Polymer, 48, 7193-7200. doi: 10.1016/j.polymer.2007.09.051
6. MAGALHÃES, N. F., ANDRADE, C. T. (2009). Termoplastic corn starch/clay hybrids: effect of clay type and content on physical properties. Carbohydrate Polymers, 75, 712-718. doi: 10.1016/j.carbpol.2008.09.020
7. LI, H., HUNEAULT, M. A. (2011). Comparison of sorbitol and glycerol as plasticizers for thermoplastic starch in TPS/PLA blends. Journal of Applied Polymer Science, 119, 2439-2448. doi: 10.1002/app.32956
8. BASTIOLI, C. (1998). Biodegradable Materials – Present situation and future perspectives. Macromollecular Symposia, 135, 193-204. doi: 10.1002/masy.19981350122
9. LÖRCKS, J. (1998). Properties and applications of compostable starch-based plastic material. Polymer Degradation and Stability, 59, 245-249. doi: 10.1016/S0141-3910(97)00168-7
10. RINDLAV-WESTLING, A., GATENHOLM, P. (2003). Surface composition and morphology of starch, amylose, and amylopectin films. Biomacromolecules, 4, 166-172. doi: 10.1021/bm0256810
11. FERREIRA, W. H., KHALILI, R. R., JUNIOR., M. J. M. F., ANDRADE, C. T. (2014). Effect of organoclay on blends of individually plasticized thermoplastic starch and polypropylene. Industrial Crops and Products, 52, 38-45. doi: 10.16/j.indcrop.2013.10.016
12. OROMIEHIE, A. R., TAHERZADEH IARI, T., RABIEE, A. (2012). Physical and thermal mechanical properties of corn starch/LDPE composites. Journal of Applied Polymer Science, 127, 1128-1134. doi:10.1002/app.37877
13. PEDROSO, A. G., ROSA, D. S. (2005). Effects of compatibilizer PE-g-GMA on the mechanical, thermal and morphological properties of virgin and reprocessed LDPE/corn starch blends. Polymers for Advanced Technologies, 16, 310-317. doi:10.1002/pat581
Publicado
2016-02-21
Como Citar
DE OLIVEIRA, Carlos I. R. et al.
PROPRIEDADES MECÂNICAS E MORFOLOGIA DE MISTURAS DE POLIPROPILENO E AMIDO TERMOPLÁSTICO.
Acta Scientiae et Technicae, [S.l.], v. 3, n. 2, fev. 2016.
ISSN 2317-8957.
Disponível em: <http://www.uezo.rj.gov.br/ojs/index.php/ast/article/view/86>. Acesso em: 18 maio 2024.
doi: https://doi.org/10.5935/2317-8957.20150003.
