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Flexibility improvement of poly(lactic acid) by stearate‐modified layered double hydroxide
Author(s) -
Mahboobeh Eili,
Yunus Wan Md Zin Wan,
Hussein Zobir,
Ahmad Mansor,
Ibrahim Nor Azowa
Publication year - 2010
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.32461
Subject(s) - stearate , coprecipitation , hydroxide , materials science , lactic acid , nanocomposite , ultimate tensile strength , stearic acid , chemical engineering , nuclear chemistry , polymer chemistry , chemistry , inorganic chemistry , composite material , biology , bacteria , engineering , genetics
Poly(lactic acid)/layered double hydroxide (PLA/LDH) nanocomposites were prepared from PLA and stearate‐Mg 3 Al LDH via a solution casting method. The anionic clay Mg 3 Al LDH was prepared first by coprecipitation method from nitrate salts solution at pH 9 and then modified by stearate anions through an ion exchange reaction. This modification increased the basal spacing of the synthetic clay from 8.72 to 31.68 Å. The presence of stearate ions in the synthesized Mg 3 Al LDH was shown by the stearate‐Mg 3 Al LDH infrared spectrum. When the stearate‐Mg 3 Al LDH at the low concentration was dispersed in the PLA matrix, its layers were largely delaminated. The presence of 1.0 wt % of the stearate‐Mg 3 Al LDH in the PLA improved drastically (of around 650%) of its elongation at break but retained its tensile strength and modulus as compared to those of the pure PLA. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010