Poly(propylene) with micro‐fillers—the way of enhancement of toughness

Abstract

Commercially available poly(propylene)(PP) (MOSTEN, MFR ¼ 4 g/10 min) supplied by a Czech company Chemopetrol Litvínov and precipitated calcium carbonate (CaCO 3 ) was used for this study. The CaCO 3 particles were coated with surface agent improving their dispersion.The effect of the PP structure, the volume content and surface coating of particles on the decisive mechanical properties (dynamic modulus of elasticity and dynamic fracture toughness) was evaluated by means of dynamic mechanical thermal analysis (DMTA) and instrumented Charpy tester. The dispersion of the filler particles was qualitatively estimated by scanning electron microscopy (SEM). The change of solid phase PP ratio was evaluated utilizing differential scanning calorimetry (DSC) and nuclear magnetic resonance (pulsed 1 H-NMR).The composites in the study demonstrated the enhanced toughness with respect to the native PP. The correlation between the structure and fracture parameters was confirmed.

Improvement of the Visible‐Light Photocatalytic Performance of TiO2 by Carbon Mesostructures

“…The advantageous potential of micro fillers is well known and proven approach for material enhancements in industry as well as in the appliance industry 5, 8, 22…”

“…Research works on all‐PP composites has shown so far that the creep behavior PP/PP composites depends strongly on stress, temperature, void content, (fiber) loading, and (fiber) dimensions 6, 8…”

A mixtures’ model for porous particle–polymer composites

“…= 39 GPa (Kucera and Nezbedova, 2007 (Raman, 1997) It is at the very least interesting to note the considerably high magnitude of difference in the predictions that result from the modifications made in Section 2. The Reuss model is sometimes taken to be a reasonable 'lowest limit' estimator for the Young modulus in particulate composites provided the particle fraction is below 0.3 (Rothon, 2003).…”

“…For the experimental work, representative material samples were used for calculating E c , the Voigt, Reuss, Bert and McAdam models in conjunction with the mercury porosimetry results and the particle size distribution statistics. A value of 39 GPa from Kucera and Nezbedova (2007) was assigned to the particles and the binder was taken to be 4 MPa based on Raman (1997), which was furthermore confirmed through experimental testing. The statistical modelling provided all the necessary parameters for calculating the E c (Eq.…”

Electrically conducting polypropylene/polyaniline‐grafted‐short glass fiber composites: Microstructure and dynamic mechanical analysis

“…There are many studies related to the improvement of the mechanical properties of PP, for example, the addition of elastomer particles, such as SEBS improves their impact resistance but significantly reduces its stiffness and yield strength [1–4]. Improvement in impact resistance of PP was obtained with the addition of calcium carbonate (CaCO 3 ) [5]. Adding glass fibers to PP is relatively easy and very effective for reinforcing tensile, flexural, and impact properties [6–8].…”