Thermal Analysis And Dielectric Spectrum Of The Glycol-glycerol Binary System Solution

The glass transition mechanism is explored is one of the core problems in condensed matterphysics. It has always been a very active research field. But there are still many unsolvedproblems.Glycerol is a typical glass material and ethylene glycol easy to crystallization. So this paperdesigns the glycol-glycerol binary system solution. Glycerol quality percentage from2%to95%within the scope of binary solution was measured by thermal analysis.And glycerol qualitypercentage from10%to90%within the scope of binary solution was measured by dielectricspectroscopy. And researched in behavior of the before and after of glass transition. It provided toinformation for the research of glass transition mechanism.1) Thermal analysis results showed that: In this paper, all the ethylene glycol-glycerolbinary system solution occurred glass transition. With the increase of glycerol quality percentage,its glass transition temperature moves to the high glass transition temperature, and the basic linearrelationship. Some components in the crystallization and melting, glycerol quality percentagefrom2%to8%within the scope of the binary system solutions, there were obvious thecrystallization and melting peak, and all were unimodal. Glycerol quality percentage from10%to16%within the scope of the binary system solutions, there were obvious the crystallization andmelting peak too. But the crystallization and melting was continuous, the crystallization wasbimodal. Percentage of glycerol was greater than16%of the binary system solution, with theincrease of glycerol quality percentage the glass transition of the dualistic system solution processwas gradually obvious, And the entire process of heating up, there was no crystallization processand melting process.2) Dielectric spectroscopy results showed that: Binary system solution of the real part (’) ofcomplex dielectric constant (K) all were the emergence of a step change. At the same timecorresponded to appear a relaxation peak (P) on the imaginary part (").And the samefrequency of the imaginary part of relaxation peak temperature Tpand real component on thefastest change were basically identical. In the same quality percentage, with the increase offrequency, relaxation peak corresponds to move to the high temperature. Under the samefrequency, with the increase of quality percentage, relaxation peak corresponds to move to thehigh temperature. The results also indicated that, at high temperature (250K to350K) there was areal imaginary part of the process of rapid increase, and the corresponding numerical value wasbigger.3) The relation between the average relaxation time along with the change of temperature bythe dielectric spectra of each composition data based on the Debye relaxation theory, activateenergy and activation energy, and use Vogel Fulcher-Tammann (VFT) rule, has carried on thefitting obtained activate energy and activation energy of System, and found both increased withthe increase of glycerol quality percentage have similar laws.4) Analyzed dielectric spectrum of high temperature of different components by used theimaginary part of dielectric spectrum constant and the relationship between the diffusioncoefficients, and the results showed that dielectric spectrum constant of high temperature as thechange of frequency satisfied ion diffusion law, and it suggests that high dielectric behavior ismainly caused by the ion diffusion.