Differential Scanning Calorimetry for Measuring the Glass Transition Temperature of Resin

The glass transition temperature (Tg) is a key thermal performance parameter of resin materials, which directly affects the mechanical properties, processing adaptability, and stability of the material under different temperature environments. By using differential scanning calorimetry (DSC), the glass transition temperature of resin samples can be accurately measured, providing reliable thermal performance data support for the selection and process optimization of resin applications in electronic packaging, composite material matrices, and other fields.

1、 Operation steps of the experiment

1. Measuring instrument: DZ-DSC400 differential scanning calorimeter

2. Measurement sample: resin sample

3. Experimental parameter setting: Before the experiment, turn on the instrument power and software, check if the instrument can operate normally, calibrate the instrument, and then place the crucible with the sample on the furnace tray, and place the empty crucible together for reference. Then set the parameters and raise the temperature to 200 ℃ at a rate of 10 ℃/min. The software will record the measured spectrum data in real time.

4. Measurement chart:

5. Measurement spectrum analysis:

The above figure shows the glass transition temperature test of the resin, and three data points can be seen from the figure; T1：52.188℃； Tg：54.154℃； T2: 55.939 ℃, the meaning of T1 point is the starting temperature of glass transition (the temperature at which the material begins to soften), indicating that the resin transitions from the glassy state to the highly elastic state at 52.188 ℃; The meaning of Tg point is the characteristic glass transition temperature (main transition peak), defined as the critical point at which resin properties undergo significant changes; T2 is the termination temperature of the glass transition temperature (softening completion), indicating that the resin completes structural relaxation at 55.939 ℃. Transition interval width: T2-T1=3.751 ℃, the interval is narrow, indicating good uniformity of the resin structure. Summary: The glass transition temperature (Tg) of the resin is 54.154 ℃, with a smooth and narrow transition process and good material structure uniformity.

2、 Experimental conclusion

Resin, as the basic material of modern industry, is widely used in fields such as coatings, adhesives, composite materials, 3D printing, etc. Its performance is significantly affected by factors such as molecular structure, curing behavior, and thermal stability. Differential Scanning Calorimeter (DSC) has become an important analytical tool in the resin industry due to its high measurement accuracy and convenient operation.