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In situ binary sol–gel reaction of various trifunctional alkoxysilane in the silane‐grafted polyolefin matrix and its effect upon the mechanical properties
Author(s) -
Adachi Kenta,
Honda Kensuke,
Yamazaki Suzuko,
Hirano Tomoyuki,
Kurokawa Hiroshi,
Wakabayashi Akinobu,
Kasai Paul H.,
Nakamae Katsuhiko,
Iwabuki Hitoshi,
Murakami Koji
Publication year - 2011
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21856
Subject(s) - materials science , ethylene propylene rubber , attenuated total reflection , alkyl , fourier transform infrared spectroscopy , silane , siloxane , electron paramagnetic resonance , ultimate tensile strength , composite material , silsesquioxane , copolymer , polymer chemistry , polymer , chemical engineering , organic chemistry , chemistry , physics , nuclear magnetic resonance , engineering
The vinyltrimethoxysilane‐grafted ethylene‐propylene copolymer/trifunctional methoxysilane (EPR‐ g ‐VTMS/RTMS) composites were prepared via in situ silica sol–gel reactions. Five trifunctional methoxysilane compounds ( n ‐hexyltrimethoxysilane, n ‐decyltrimethoxysilane, n ‐tetradecyltrimethoxysilane, n ‐octadecyltrimethoxysilane, and phenyltrimethoxysilane) have been selected for this study. The water‐cross‐linked EPR‐ g ‐VTMS/RTMS composites were characterized by attenuated total reflectance‐Fourier transform infrared spectroscopy, gel content, solid‐state 29 Si CP/MAS NMR, wide‐angle x‐ray scattering, tensile strength, and field emission scanning electron microscopy measurements. The type of RTMS additive has a substantial influence on the nature of siloxane band networks and eventually the mechanical tensile properties. This finding suggests that the interaction and/or entanglement between the EPR‐ g ‐VTMS matrix and the substituent of the RTMS additives are crucial for the modifying mechanical properties. Moreover, for the water‐cross‐linked EPR‐ g ‐VTMS/C n TMS ( n = 6, 10, 14, and 18) composites, the joint evidence provided by attenuated total reflectance‐Fourier transform infrared spectroscopy, 29 Si CP/MAS NMR, and wide‐angle x‐ray scattering results suggested the formation of ladder‐type poly( n ‐alkyl silsesquioxane)s and the presence of the highly ordered structure with a thickness equal to the length of two n ‐alkyl groups in all‐ trans conformation. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers.