【摘要】 本文利用差示扫描量热仪(DSC)研究了降温速率和溶质比对叔丁醇/蔗糖/水三元系统玻璃化转变温度Tg’的影响。实验结果表明,降温速率的增大会使溶液的玻璃化转变温度明显降低。对于10%叔丁醇/10%蔗糖/水溶液,当降温速率大于10℃/min时,Tg’为-42℃。对于叔丁醇与蔗糖的浓度比小于0.2的溶液,降温时叔丁醇不会发生结晶。更多还原

【Abstract】 In order to examine the effects of cooling rate and solute composition on the glass transition temperature of tertiary butyl alcohol (TBA)/sucrose/water ternary system, a differential scanning calorimeter (DSC) was employed to study the freezing properties of the ternary system. The experimental results showed that the increase of cooling rate would result in the apparent decrease of Tg’. For 10% TBA /10 %sucrose /water solution, the value of Tg’ is -42℃ when the cooling rate is greater than 10℃/min. When the ratio of TBA to sucrose is less than 0.2, TBA cannot crystallize during cooling.更多还原