Properties of Polymerization-Filled Composites

Spherical indentor deformability tests of composites with PE synthesized on different fillers have shown [164] that the deformation of PFCM containing high percentages of filler (and polymer concentrations of less than 10% by mass) is substantially elastic and the specimen recovers completely after release of the load. As the polymer content increased to 60% by mass considerable residual deforma- 

The unfavorable effect of reduced MM of polyethylene on the complex of properties has also been reported in [322, 323] the parameter e is the most affected. From Table 10 one can see that this characteristic can be improved considerably 

3 I — the filler was activated in the liquid phase via reaction of the organoaluminum compounds fixed on the surface with VOCl3 II — activation of filler by previous securing on the surface of VOCl3 from the gas phase particles of less than 5-10microns in size amount to 96%  

In [324] it was noted that in case of polyethylene-based PFCM it is the MM which is the parameter controlling the composite viscosity. For a fixed MM, the viscosity of the melt increases symbatically with the filling percentage by mass. The nature of the viscosity versus MM relationship is similar for both PFCM and mechanical mixtures, that is, in terms of rheology the two systems are practically identical. 

In [17] it is reported that PFCM, with PE synthesized on kaolin and having a MM of 106 and containing up to 50% by mass of filler, feature very high strain stress characteristics. For the composites containing 30 and 50% by mass of kaolin the value of rtens is 46.44 and 23 MPa respectively etens decreases from 260 to 240 and 150%, and the modulus increases from 900 to 1900 and 2900 MPa. 

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Properties of Polymerization-Filled Composites and Compositions with Polymerization-Modified Fillers... 

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