Influence of Morphology on Fracture Propagation of PMMAe/PC Blend in Tensile Tests at High Strain Rate

作     者：Gomes, Felipe Pedro da Costa Reinaldo, Juciklécia da Silva Rodrigues, Antônio Henrique Venâncio de Macedo, Thatiana Cristina Pereira Silva, Bismarck Luiz Ito, Edson Noriyuki 

作者机构：Graduate Program in Materials Science and Engineering Federal University of Rio Grande do Norte Avenida Senador Salgado Filho 3000 NatalRio Grande do Norte59078–970 Brazil Mechanical Engineering Department Federal University of Rio Grande do Norte Avenida Senador Salgado Filho 3000 NatalRio Grande do Norte59078–970 Brazil Graduate Program in Materials Science and Engineering Federal University of Sergipe Avenida Marechal Rondon s/n 49100-000 São CristóvãoSergipe Brazil Materials Engineering Department Federal University of Rio Grande do Norte Avenida Senador Salgado Filho 3000 NatalRio Grande do Norte59078–970 Brazil 

出 版 物：《Macromolecular Symposia》 (Macromol. Sympos.)

年 卷 期：2020年第394卷第1期

页      面：2000153-2000153页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：The authors are grateful to CNPq (National Council for Scientific and Technological Development) for scientific initiation scholarship to Antônio Henrique Venâncio Rodrigues 

主　　题：Fracture 

摘      要：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. © 2020 Wiley-VCH GmbH