Measurement And Analyses Of The Characteristic Time Of Translation And Rotation Degrees Of Freedom In Tripropylene Glycol And Other Structural Glasses

The glass transition has always been one of the hot topics in the field of condensed matter physics in the past century and many articles appear in the world's top academic periodicals.At the present stage,the methods of combined with several techniques are used to obtain the system characteristic time in a large time range,but the time range of each technique in the same process is relatively small.At the early stage,a method are explored by our group,which can get translational and rotational characteristic time of structural glass systems at large time range in one measure process through ion probe.But in the early stage of research,the sample species of the research are relatively few.To confirmation the reliability and applicability of the method,it is necessary to confirming the method's universality and applicability by studing more system's dielectric spectrum and obtaining those systems dynamic information,.In this paper,the translational and rotational relaxation time of the tripropylene glycol,dipropylene glycol,1,2-pentanediol and 1,3-propanediol mixing ion probe samples and original sample are obtained.The translational characteristic time of dibutyl phthalate,diisobutyl phthalate,triacetin and2-methyl-2-propenoic acid cyclohexyl ester samples are obtained through the sample carries ion itself.The main conclusions are as follows.1)Temperature dependent complex dielectric constants of tripropylene glycol,dipropylene glycol,1,2-pentanediol and 1,3-propanediol are measured.The samples ion probe concentration with 0.1‰,0.3‰,0.5‰.The frequency range of measurement from 1Hz to 10~6 Hz and the temperature-changing rate is1.5K/min.The dielectric spectrum appear?-relaxation process and ion diffusion behavior.The sample's translational and rotational characteristic time are obtained at large time range,and they are coincidence with each other.2)The?-relaxation process and ion diffusion behavior are also observed at the dielectric spectrum of tripropylene glycol,dipropylene glycol,1,2-pentanediol and 1,3-propanediol original samples.Compare the result of sample with the one ion probe carries itself,we founding that sample's translational characteristic time is coincidence with rotational characteristic time.3)We also studying the dibutyl phthalate,diisobutyl phthalate,triacetin and 2-methyl-2-propenoic acid cyclohexyl ester samples.Those samples have difficulty to mixing ion probe.Translational characteristic time of the sample is coincidence with rotational characteristic time.In this paper,through ion probe get multiple systems translational characteristic time which further confirmed the applicability and universality of the method.The ion probe could be mixing or sample carrying itself.