TY - JOUR
T1 - Modification of mechanical properties in polymer nanocomposites by the incorporation of specific self-complementary hydrogen bonding interactions
AU - Neikirk, Colin C.
AU - Chung, Jae Woo
AU - Priestley, Rodney D.
PY - 2015/11/19
Y1 - 2015/11/19
N2 - The dispersion, aggregate morphology, and interfacial strength of fillers in polymer nanocomposites are crucial in determining their physical properties. Here, we utilize the quadruple hydrogen bonding group ureidopyrimidinone (UPy) to investigate enthalpic effects on the dispersion of silica nanoparticles in a poly(butyl acrylate) copolymer matrix and to correlate dispersion with mechanical properties. Butyl acrylate was copolymerized with an UPy side chain functional methacrylate monomer and blended with silica nanoparticles containing various degrees of UPy, hexyl, or silanol surface functionality. The tensile and dynamic mechanical responses of these nanocomposites were measured, and the effects of varying surface functionality on mechanical properties are discussed and correlated to dispersion by TEM. The competing effects of filler-filler, matrix-filler, and matrix-matrix hydrogen bonding lead to a system where both the type and amount of filler surface functionality are of critical importance to the material's final strength.
AB - The dispersion, aggregate morphology, and interfacial strength of fillers in polymer nanocomposites are crucial in determining their physical properties. Here, we utilize the quadruple hydrogen bonding group ureidopyrimidinone (UPy) to investigate enthalpic effects on the dispersion of silica nanoparticles in a poly(butyl acrylate) copolymer matrix and to correlate dispersion with mechanical properties. Butyl acrylate was copolymerized with an UPy side chain functional methacrylate monomer and blended with silica nanoparticles containing various degrees of UPy, hexyl, or silanol surface functionality. The tensile and dynamic mechanical responses of these nanocomposites were measured, and the effects of varying surface functionality on mechanical properties are discussed and correlated to dispersion by TEM. The competing effects of filler-filler, matrix-filler, and matrix-matrix hydrogen bonding lead to a system where both the type and amount of filler surface functionality are of critical importance to the material's final strength.
KW - Hydrogen bonding
KW - Nanocomposites
KW - Supramolecular polymers
UR - http://www.scopus.com/inward/record.url?scp=84945319502&partnerID=8YFLogxK
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U2 - 10.1016/j.polymer.2015.10.019
DO - 10.1016/j.polymer.2015.10.019
M3 - Article
AN - SCOPUS:84945319502
VL - 79
SP - 212
EP - 220
JO - Polymer
JF - Polymer
SN - 0032-3861
ER -