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Effects of compatibilizer on the mechanical, rheological, and shape memory behaviors of poly(lactic acid) and poly(MnBM) blends
Author(s) -
Kim Sung Kyu,
Jang Robin,
Kim Woo Nyon
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48591
Subject(s) - materials science , ultimate tensile strength , rheology , composite material , methyl methacrylate , izod impact strength test , flexural strength , polymer blend , lactic acid , brittleness , poly(methyl methacrylate) , natural rubber , copolymer , polymer , genetics , biology , bacteria
The effects of compatibilizer on the morphological, mechanical, rheological, and shape memory properties of poly(lactic acid) (PLA) and poly(methyl methacrylate‐ block ‐ n ‐butyl acrylate‐ block ‐methyl methacrylate) (Poly(MnBM)) (80/20) blend were investigated. From the morphological results, the addition of 1 wt% SAN‐MAH as a compatibilizer showed minimum Poly(MnBM) domain size among the blends with the SAN‐MAH in the amounts from 0 to 7 wt%. Tensile and flexural strengths, and complex viscosity of the blends showed maximum when the SAN‐MAH content was 1 wt%, which suggested the increased compatibility between the PLA and Poly(MnBM) phases. From the above results, the optimum compatibilizer content of the PLA and Poly(MnBM) blend was 1 wt%. The recovery ratio of tensile energy was found to be 83 and 56% for the PLA/Poly(MnBM) blend with and without the SAN‐MAH (1 wt%), respectively. Upon blending the PLA and Poly(MnBM) (80/20) with SAN‐MAH (1 wt%), the increase of recovered tensile energy was observed, and that the brittleness of PLA was improved to be ductile which resulted an improved shape memory behavior of the blend. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48591.