C. H. Azhari
Department of Mechanical and Materials Engineering, Faculty of Engineering,
Universiti Kebangsaan Malaysia, 43600 Bandar Baru Bangi, Malaysia
S. F. Wong
Department of Mechanical and Materials Engineering, Faculty of Engineering,
Universiti Kebangsaan Malaysia, 43600 Bandar Baru Bangi, Malaysia
ABSTRACT
The influence of morphology on mechanical property of several polypropylene/starch (PP/starch) blends of varying compositions was studied. The blends prepared were at wt%PP/wt%starch of 97.5/2.5, 95/5, 92.5/7.7, 90/10, 87.5/12.5 and 85/15. The morphology of the blends observed, using scanning electron microscopy showed them to be immiscible blends with distinct polymer-starch domains at high starch volume fractions (85%PP/15%starch-87.5%PP/12.5%starch), which gradually showed the morphology of well dispersed miscible blends at lower starch volume fractions (97.5%PP/2.5%starch,95%PP/5%starch,92.5%PP/7.7%starch, 90%PP/10%starch ) The starch domains exhibited characteristic voids which could be due to thermal degradation at the processing temperatures employed. The particle size of the starch domains increased with increase in volume fraction, probably due to the agglomeration and formation of aggregates of the starch granules. The mechanical properties of the blends and viscosity of the blends decrease with increase in starch volume fractions. The mechanical properties were explained using the blend morphologies at various volume fractions.
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How to cite this article
C. H. Azhari and S. F. Wong, 2001. Morphology-mechanical Property Relationship of Polypropylene/starch Blends. Pakistan Journal of Biological Sciences, 4: 693-695.
DOI: 10.3923/pjbs.2001.693.695
URL: https://scialert.net/abstract/?doi=pjbs.2001.693.695
DOI: 10.3923/pjbs.2001.693.695
URL: https://scialert.net/abstract/?doi=pjbs.2001.693.695
REFERENCES
- Bikiaris, D.J., I. Aburto, E. Alric, M. Borredon, B. Botev and C. Panayatiotou, 1999. Mechanical properties and biodegradability of ldpe blends with fatty-acid esters of amylose and starch. J. Applied Polymer Sci., 71: 1089-1100.
Direct Link - Bikiaris, D. and C. Panayiotou, 1998. LDPE/Starch blends compatibilized with PE-g-MA copolymers. J. Applied Polymer Sci., 70: 1503-1521.
Direct Link - Gonsalves, K.E., S.H. Patel and X. Chen, 1991. Development of potentially degradable materials for marine applications. ii polypropylene-starch blends. J. Applied Polymer Sci., 43: 405-415.
Direct Link - Prinos, J., D. Bikiaris, S. Theologidis and C. Panayiotou, 1998. Preparation and characterization of ldpe/starch blends containing ethylene/vinyl acetate copolymer as compatibilizer. Polymer Eng. Sci., 38: 954-954.
Direct Link - Thakur, I.M., S. Iyer, A. Desai, A. Lele and S. Devi, 1999. Morphology, thermomechanical properties and biodegradability of low density polyethylene/starch blends. J. Applied Polymer Sci., 74: 2791-2802.
Direct Link - Thieubaud, S., J. Aburto, I. Alric, E. Borredon, D. Bikiaris, J. Prinos and C. Panayiotou, 1997. Properties of fatty-acid esters of starch and their blends with LDPE. J. Applied Polymer Sci., 65: 705-721.
Direct Link