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Interaction of nylon 6‐clay surface and mechanical properties of nylon 6‐clay hybrid
Author(s) -
Usuki Arimitsu,
Koiwai Akihiko,
Kojima Yoshitsugu,
Kawasumi Masaya,
Okada Akane,
Kurauchi Toshio,
Kamigaito Osami
Publication year - 1995
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.1995.070550113
Subject(s) - montmorillonite , saponite , materials science , clay minerals , intercalation (chemistry) , mica , nylon 6 , chemical engineering , ionic bonding , polymer chemistry , composite material , chemistry , mineralogy , polymer , inorganic chemistry , organic chemistry , ion , engineering
We synthesized nylon 6‐clay hybrid materials using four types of clay minerals, montmorillonite, saponite, hectrite, and synthetic mica. The mechanical properties of their injection molded specimens were measured according to ASTM. Nylon 6‐clay hybrid using montmorillonite was superior to the other hybrids in mechanical properties. This might result from the difference in the interaction between nylon molecules and silicates in the hybrids. To clarify this hypothesis, we synthesized intercalated compounds of the clay minerals with glycine as the model of the hybrids, and analyzed the interaction using 15 N cross polarization magic angle spinning (CP/MAS) NMR spectroscopy. The 15 N‐NMR result reveals that the positive charge density on the nitrogen of the intercalated compound based on montmorillonite was largest in all the intercalated compounds. It was suggested that montmorillonite interacted strongly with nylon 6 by ionic interaction. This ionic interaction was one of the reasons why these hybrid materials had superior mechanical properties. © 1995 John Wiley & Sons, Inc.