PC, Makrolon 2405;
PC/ABS Blend Bayblend T85
Measuring cell: DSC20
Pan: Aluminum standard 40 µl, pierced lid
Sample preparation: Disk cut from pellet
DSC measurement: First run 30 to 250 °C at 20 K/min to eliminate the thermal history, cooling at 20 K/min
Actual measurement: heating from 30 to 250 °C at 20 K/ min
Atmosphere: Nitrogen, 50 cm3/min
In the table the glass transition temperatures are given as midpoints at 50% transition.
From the ratio of the step heights of the PC glass transition (Δcppure/Δcpmixture), it can be estimated that the mixture consists of two thirds PC and on third ABS.
Polycarbonate and some of its blends can easily be measured by DSC. Certain PC films (e.g. Makrofol) are semicrystalline and exhibit a small fusion peak around 235 °C.
PC and a PC/ABS Blend Measured by DSC | Thermal Analysis Handbook No.HB249 | Application published in METTLER TOLEDO TA Application Handbook Thermoplastics