TY - JOUR
T1 - Study of polypropylene/ethylene-propylene-diene monomer blends reinforced with sisal fibers
AU - Pigatto, Caroline
AU - Almeida Junior, Jose Humberto Santos
AU - Ornaghi Junior, Heitor Luiz
AU - Rodriguez, Adriane Lawisch
AU - Mendes Mählmann, Cláudia
AU - Amico, Sandro Campos
PY - 2012/12
Y1 - 2012/12
N2 - Thermoplastics reinforced with natural fibers have attracted much attention from researchers because of their advantages, especially regarding environmental aspects. However, poor impact strength, particularly at low temperatures, limits the application of some thermoplastics, such as polypropylene (PP). To minimize this drawback, impact modifiers have been used, including the terpolymer of ethylene-propylene-diene (EPDM). In this work, PP/EPDM/sisal composites of distinct compositions were investigated focusing on the effect of the alkali (NaOH) treatment of the vegetable fiber on the composites properties regarding physical, mechanical, thermal, and morphological behavior. The results indicated that flow rate decreases at higher fiber content due to flow hindering by the presence of the fibers. The addition of the fiber, in general, increased Young's modulus and strength (tensile and flexural), whereas impact strength increased for higher EPDM content. The alkali treatment was considered generally efficient in terms of mechanical properties, even though this was not found in the dynamic mechanical analysis.
AB - Thermoplastics reinforced with natural fibers have attracted much attention from researchers because of their advantages, especially regarding environmental aspects. However, poor impact strength, particularly at low temperatures, limits the application of some thermoplastics, such as polypropylene (PP). To minimize this drawback, impact modifiers have been used, including the terpolymer of ethylene-propylene-diene (EPDM). In this work, PP/EPDM/sisal composites of distinct compositions were investigated focusing on the effect of the alkali (NaOH) treatment of the vegetable fiber on the composites properties regarding physical, mechanical, thermal, and morphological behavior. The results indicated that flow rate decreases at higher fiber content due to flow hindering by the presence of the fibers. The addition of the fiber, in general, increased Young's modulus and strength (tensile and flexural), whereas impact strength increased for higher EPDM content. The alkali treatment was considered generally efficient in terms of mechanical properties, even though this was not found in the dynamic mechanical analysis.
U2 - 10.1002/pc.22371
DO - 10.1002/pc.22371
M3 - Article
VL - 33
SP - 2262
EP - 2270
JO - Polymer Composites
JF - Polymer Composites
SN - 0272-8397
IS - 12
ER -