杯芳烃交联聚硅氧烷热稳定性能研究

STUDY ON THE THERMAL STABILITY OF CALIXARENE CROSSLINKED POLYSILOXANES

The calixarene crosslinked polysiloxanes were obtained by crosslinked (N-(β-aminoethyl)aminopropyl) modified silicon oil with 1,3-diglycidyl(calix[4]arene.)Their structures were characterized by infrared spectra and scanning electron microscopy.The thermal degradation behaviour of the calixarene crosslinked polysiloxanes with various content of calixarene 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 520℃,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)aminopropyl) modified silicon oil and 1,3-bis(2′,3′-epoxypropoxy)benzene crosslinked polysiloxane.

The calixarene crosslinked polysiloxanes were obtained by crosslinked N-（β-aminoethyl）aminopropyl modified silicon oil with 1,3-diglycidyl calix[4] arene. Their structures were characterized by infrared spectra and scanning electron microscopy. various content of calixarene The thermal degradation behaviour of the calixarene crosslinked polysiloxanes with 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 520℃, 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）aminopropyl modified silicon oil and 1,3-bis （2＇, 3＇- epoxypropoxy） benzene crosslinked polysiloxane.