Structure and conformation of poly(ethylene glycol) in confined space of montmorillonite

► Structure and conformation of PEG chains in confined space of MMT were studied. ► PEG chains form monolayer and double layers in MMT. ► Saturation ratios of PEG to Na-MMT and OMMT are deduced. ► A possible model of PEG intercalated MMT is proposed.