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Morphology and mechanical properties of natural rubber latex films modified by exfoliated Na‐montmorillonite/polyethyleneimine‐ g ‐poly (methyl methacrylate) nanocomposites
Author(s) -
Wang Shuyi,
Tian Xiaohui,
Sun Jinyu,
Liu Jin,
Duan Junchao
Publication year - 2016
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.43961
Subject(s) - materials science , montmorillonite , nanocomposite , ultimate tensile strength , methyl methacrylate , natural rubber , emulsion polymerization , composite material , polymer chemistry , poly(methyl methacrylate) , morphology (biology) , polymerization , chemical engineering , polymer , biology , engineering , genetics
Na‐montmorillonite/polyethyleneimine‐ g ‐poly(methyl methacrylate) (Na‐MMT/PEI‐ g ‐PMMA) nanocomposite latexes were prepared by soap‐free emulsion polymerization in the aqueous suspension of Na‐MMT. The exfoliated morphology of the nanocomposites was confirmed by XRD and TEM. With the aim of improving morphology and mechanical properties of natural rubber latex (NRL) films, the synthesized Na‐MMT/PEI‐ g ‐PMMA nanocomposites were mixed with NRL by latex compounding technology. The results of SEM and AFM analysis showed that the surface of NRL/Na‐MMT/PEI‐ g ‐PMMA film was smoother and denser than that of pristine NRL film while Na‐MMT was dispersed uniformly on the fracture surface of the modified films, which suggested the good compatibility between NRL and Na‐MMT/PEI‐ g ‐PMMA. The tensile strength of NRL/Na‐MMT/PEI‐ g ‐PMMA films was increased greatly by 85% with 10 phr Na‐MMT/PEI‐ g ‐PMMA when Na‐MMT content was 3 wt % and the elongation at break also increased from 930% to 1073% at the same time. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43961.