Carboxymethyl hydroxypropyl cellulose (CMHPC) crosslinked with a novel organic titanium exhibits good thermal stability determined by Thermogravimetry (TG) and Differential Thermogravimetry (DTG) method

and its hydrogel retains greater viscosity at high temperature. The structure of metal crosslinked CMHPC have been investigated by FTIR spectrome-try. The results show that the active crosslinking sites are not only the carboxymethyl groups

but also the hydroxypropyl groups

and the interaction model are influenced by degree of substitute of CMHPC and pH of reaction medium.