The calixarene crosslinked polysiloxanes were obtained by crosslinked N-(β-aminoetbyl)aminopropyl modified silicon oil with 1

3-diglycidyl calix[4]arcne．Their structures were characterized by infrared spectra and scanning electron microscopy．The thermal degradation behaviour of the calixarene crosslinked polysiloxanes with various content of calixaren under a nitrogen atmosphere was investigated by using thermogravimetry(TG)

it showed that all the crosslinked polysiloxanes exhibited two-stage decomposition

the first decomposition peak was at about 391℃ and the second was at about 5200℃

the ratio of the two fastest weight loss rates was varied with the content of calixarene．Under our experimental conditions

the calixarene crosslinked polysiloxane with 3％content of calixarene had the lowest rate of degradation during the first stage of decomposition．The thermal stability of calixarene crosslinked polysiloxanes was enhanced compared with that of N-(β-aminoethyl)aminoprepyl modified silicon oil and 1

3-bis(2’

3'-epoxypropoxy)benzene crosslinked polysiloxane．