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A novel mechanism of exfoliation and physical properties of PU/organoclay nanocomposites
Author(s) -
Bae Soo Bin,
Kim Chang Kee,
Kim Youn Cheol,
Chung In Jae
Publication year - 2013
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.38622
Subject(s) - isophorone diisocyanate , materials science , polyurethane , nanocomposite , intercalation (chemistry) , curing (chemistry) , hydroxyl terminated polybutadiene , organoclay , isophorone , polymer chemistry , chemical engineering , exfoliation joint , polybutadiene , polymerization , polymer , composite material , chemistry , graphene , organic chemistry , copolymer , diamine , engineering , nanotechnology
The novel mechanism of exfoliation of silicate was investigated. Exfoliation and intercalation was achieved even at 15 wt % in the polyurethane (PU) matrix via in situ polymerization. Through using IR consumption graph of curing agent, crosslinking equation could be derived. The diffusion rate of curing agent, Isophorone diisocyanate, brought the different morphologies as well as crosslinking densities of nanocomposites. Dodecylamine, the organifier having similar hydrogen‐bonding component with Isophorone diisocyanate than octadecylamine, affected the faster diffusion of isophorone diisocyanate in hydroxyl terminated polybutadiene/organoclay composite. This phenomenon was confirmed by DSC graph, XRD, SAXS, and TEM images. The nanocomposites showed high physical properties until at 10 wt % clay. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013