Ta q800 analyzer

DMA was performed using a TA Q800 analyzer (TA Instruments, New Castle, DE, USA) with DMA Multi-strain module type and single cantilever clamp in a temperature range of 0–150 °C at a heating rate of 1 °C/min and a frequency of 5 Hz. Specimens with typical dimensions 25 (l)/12 (w)/2 (th) mm were prepared via thermal bulk radical copolymerization using silicone molds.

Dynamic mechanical analysis (DMA) of wood fiber/HDPE composites was performed using a TA Q800 analyzer (TA Instruments Inc., New Castle, DE, USA). The testing temperature ranged from 40 °C to 130 °C and the heating rate was 3 °C·min⁻¹. Three replicates with dimensions of 35 mm in length, 12 mm in width, and 3 mm in thickness were performed for each sample.
The interfacial bonding between the modified poplar wood fiber and the polymer matrix can be evaluated using the adhesion factor (A), which is determined from DMA data at 40 °C based on the study of Kubat et al. [23 ] by using Equation (2):
$A\left(\mathrm{MPa}\right)=\left(1/\left(1-V_{\mathrm{f}}\right)\right)\left(\tan {\mathsf{\delta }}_{\mathrm{c}}/\tan {\mathsf{\delta }}_{\mathrm{m}}\right)-1$
where c and m subscripts represent composite and matrix, respectively, and V_f is the fiber volume fraction. A low value of A is an indicator of good adhesion or a high degree of interaction between the two phases and vice versa.

DMA was performed using a TA Q800 analyzer (TA Instruments, New Castle, DE, USA) with DMA Multi-strain module type and single cantilever clamp in a temperature range of 0–150 °C at a heating rate of 1 °C/min and a frequency of 5 Hz. Specimens with typical dimensions 25/12/2 mm (l/w/th) were prepared via thermal bulk radical copolymerization using silicone molds.