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Influence of morphology on the dynamic mechanical characteristics of PP-EP/EVA/organoclay nanocomposites
Affiliation:1. Instituto de Química Aplicada, Universidad del Papaloapan, Circuito Central 200, Col. Parque Industrial, Tuxtepec, Oaxaca 68301, Mexico;2. Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna 140, Saltillo, Coahuila 25294, Mexico;3. CIEP-FCQ, UASLP, Zona Universitaria, Av. Dr. Manuel Nava 6, San Luis Potosí, SLP 78210, Mexico;1. Department of Energy Resources Engineering, Stanford University, USA;2. Atmospheric, Earth and Energy Division, Lawrence Livermore National Laboratory, USA;1. National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang, 330063, PR China;2. School of Humanities and Law, Nanchang Hangkong University, Nanchang, 330063, PR China;1. Program of Sustainable Energy Management, Faculty of Environmental Management, Prince of Songkla University, Songkhla, Thailand;2. Faculty of Environmental Management, Prince of Songkla University, Songkhla, Thailand;1. Institute of Pavement and Railway Engineering, Hohai University, 1 Xikang Road, Nanjing 210098, China;2. Department of Civil Engineering, School of Science, Nanjing University of Science and Technology, 200 Xiaolingwei, Nanjing 210094, China;3. Intelligent Transportation System Research Center, Southeast University, 35 Jinxianghe Road, Nanjing 210096, China;1. Embrapa Soja, Londrina, PR, Brazil;2. Embrapa Cerrados, Planaltina, DF, Brazil;3. Embrapa Amapá, Macapá, AP, Brazil;4. Embrapa Roraima, Boa Vista, RR, Brazil;5. Embrapa Trigo, Passo Fundo, RS, Brazil;6. Faculdade de Agronomia e Medicina Veterinária, Universidade de Passo Fundo, Passo Fundo, RS, Brazil;7. Embrapa Uva e Vinho, Bento Gonçalves, RS, Brazil;8. Departamento de Zoologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brazil;9. Laboratório de Biologia, Centro de Ciências Exatas, da Natureza e de Tecnologia, Universidade de Caxias do Sul, Bento Gonçalves, RS, Brazil
Abstract:A study on the dynamic mechanical properties of polypropylene copolymer/ethylene–vinyl acetate/organoclay (PP-EP/EVA/C20A) nanocomposites is presented. Nanocomposites were obtained by melt blending. Morphology consisting of intercalated–exfoliated clay nanolayers preferentially located within the EVA phase was observed by transmission electron microscopy (TEM) and wide angle X-ray diffraction (WAXD). Polar groups of vinyl acetate in the EVA facilitated the polymer–clay interactions. Changes in the glass transition temperature (Tg) were correlated with changes in the clay intercalation–exfoliation levels. The highly reinforced with intercalated–exfoliated clay layers EVA phase was considered as the origin of the improvement on mechanical properties of the ternary nanocomposites and is associated with the increase on viscosity, heat deflection temperature (HDT), and storage modulus.
Keywords:A  Polymer–matrix composites (PMCs)  A  Thermoplastic resin  A  Layered structures  B  Mechanical properties
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