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Influence of Morphology on Fracture Propagation of PMMAe/PC Blend in Tensile Tests at High Strain Rate
Author(s) -
Gomes Felipe Pedro da Costa,
Reinaldo Juciklécia da Silva,
Rodrigues Antônio Henrique Venâncio,
Macedo Thatiana Cristina Pereira,
Silva Bismarck Luiz,
Ito Edson Noriyuki
Publication year - 2020
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.202000153
Subject(s) - materials science , composite material , polycarbonate , scanning electron microscope , ultimate tensile strength , optical microscope , strain rate , polymer , toughness , morphology (biology) , elastomer , polymer blend , tensile testing , fracture toughness , copolymer , genetics , biology
Abstract The aim of this study is to evaluate toughness mechanism of elastomeric poly(methyl methacrylate) (PMMAe) and polycarbonate (PC) blend through crack propagation at high speed tensile tests. Samples are processed using two types of extruders, single and twin screw, in order to eliminate the influence of processing in the final product's properties. Pure polymers and polymer blend samples are cryo‐ultramicrotomed and their morphology is characterized using atomic force microscopy (AFM). Fractured samples obtained from uniaxial tensile tests at high strain rate are inspected using optical microscopy (OM) and scanning electron microscopy (SEM). The results obtained for the PMMAe/PC blend in tests at high deformation rate showed that the shear rate during the mixing process influences the maximum strength of the polymer blend near its region of co‐continuous morphology. The visual evaluation of the fracture surface and the fractographic analysis corroborated the results of this study of polymer toughening.