The Influence of Plasma Treatment on Thermal, Dynamic-Mechanical and Rheological Properties of Polymeric Material

The presented work is focused on the characterization of plasma modified polymeric composite material by thermal analysis performed via differential scanning calorimetry and thermogravimetry in nitrogen atmosphere. Within this study was used plasma reactor based on diffuse coplanar surface barrier discharge working in ambient air at power of 375 W. The examined exposure time was set on 10 s. Also, the active plasma distance from sample surface was evaluated. Secondly, the effect of plasma modification was aimed at the characterization of glass transition temperature within the range of temperature from -70°C to 70°C at a frequency of 1kHz by DMA technique. Also, the rheology parameters aimed at the modulus comparison were monitored. Additionally, the effect of plasma was studied via curing properties wherein curing time
$(\mathbf{t}_{\mathbf{c}})$
, scorch time
$(\mathbf{t}_{\mathbf{s}})$
and curing rate index (CRI) were measured. Furthermore, the rheometry properties, the minimum torque
$(\mathbf{M}_{\mathbf{L}})$
, maximum torque
$(\mathbf{M}_{\mathbf{H}})$
before and after plasma treatment were studied.