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Intercalation and exfoliation behaviour of clay layers in branched polyol and polyurethane/clay nanocomposites
Author(s) -
Xia Hesheng,
Song Mo
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1948
Subject(s) - exfoliation joint , intercalation (chemistry) , nanocomposite , materials science , polyol , polyurethane , montmorillonite , chemical engineering , dispersion (optics) , curing (chemistry) , composite material , graphene , chemistry , organic chemistry , nanotechnology , physics , optics , engineering
The exfoliation of clay layers was realized in a tri‐hydroxyl branched polyether polyol by direct mixing and the corresponding exfoliated polyurethane/clay nanocomposite was prepared by further in situ curing. The effects of various surface‐modified organoclays and various polyol types on the intercalation and exfoliation behaviour of clay layers were investigated. The interaction between the polyol and clay and the mixing temperature plays an important role in the occurrence of exfoliation and intercalation. The relationship between rheological data of polyol/clay dispersion and the intercalation or exfoliation state of the clay was established. This provides a convenient and efficient way to evaluate the dispersion state of the clay. Based on the experimental results, a possible layer‐by‐layer exfoliation mechanism is proposed. Copyright © 2006 Society of Chemical Industry