Detection method of glass-transition temperature of rubber latex

The invention relates to a detection method of glass-transition temperature of rubber latex through non-isothermal temperature-gradient increase in a manner of differential scanning calorimetry. The method includes the steps of: 1) preparing a rubber latex dry polymer sample with an alcohol or ketone organic solvent through coagulation, 2) scanning the sample at the rate of non-isothermal temperature-gradient increase under an inert gas atmosphere to detect the glass-transition curve of the rubber latex at different temperatures, and 3) performing differential to the curve, determining the temperature at the inflection point as the glass-transition temperature of the rubber latex. Through the non-isothermal temperature-gradient increase for detecting the glass-transition temperature, analysis rate is greatly increased and meanwhile influence on detection result due to quick temperature increase is reduced. The method has good repeatability.