Filler networking surface modification

It should be noted that for polymerization-modified perlite the strength parameters of the composition algo go up with the increasing initial particle size. [164]. In some studies it has been shown that the filler modification effect on the mechanical properties of composites is maximum when only a portion of the filler surface is given the polymerophilic properties (cf., e.g. [166-168]). The reason lies in the specifics of the boundary layer formation in the polymer-filler systems and formation of a secondary filler network . In principle, the patchy polymerophilic behavior of the filler in relation to the matrix should also have place in the failing polymerization-modified perlite. 

Influence of carbon fiber fillers on the formation and phase structure. The effect of two carbon fiber fillers a basic filler (CF) and CF with a surface modification by orthophosphoric acid residues (PCF) on the kinetics of epoxypolycyanurate (EPCN)/TPU grafted semi-IPN formation and phase structure was studied [50,51]. The network component in TPU/EPCN semi-IPNs was synthesized from the reactive blend of EO and DCEBA (Section 3.2.1). Acceleration of the occurring reactions was observed by the introduction the both carbon fiber fillers into the semi-IPNs studied, as seen in Figure 10 from the kinetic curves for a semi-IPN with 20 wt% of TPU. This acceleration is assumed to be associated with the additional chemical reactions between the components, with the catalytic effect of TPU on cyanate cyclotrimerization [41,42], and with interactions of polymers with the filler surface discussed in [50]. 

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