In the process of preparing a composite polymer participate the matrix, the crosslink agent, the filler and possibly a catalyst and/or solvent. The presence of the filler makes the whole chemical process more complicated. The modification of the filler complicates further the assessment of his participation in the process. This filler’s effect strongly depends on the active modifier groups. How can be studied and formulated such a process;
Because of neither filler no modifier aren't identified (at least its nature) it is difficult to make any recommendation. But anyway I could propose you to observe crosslinking behavior in follow model composite systems: (i) matrix/crosslink agent/unmodified filler/catalyst(and/or solvent); (ii) matrix/crosslink agent/modifier/catalyst(and/or solvent); (iii) matrix/crosslink agent/unmodified filler/modifier/catalyst(and/or solvent); (iiii) matrix/crosslink agent/model/catalyst(and/or solvent) (model is a compound, which functionality (functional groups) is similar with modifier ones, but could not interact (in the same way as modifier and filler) with filler). If you compare the results of the experiments you can have defined decision. And, finally, if you not sure in mutual effect of any couple of the component, there are no other way to treat the couples under experimental (processing of composite) conditions.
Dr. Alex has clarified the situation. I can add, if other ingredients are fixed and only filler contect is varied you can have quantitative assessment if the dispersion and distribution of filler particles are assured. You must ensure filler resin compatibility so that interface is good.
Hello Mr. Delides
in addition to these recommendations I have only a small remark - silane modified glass fibers are often used for epoxi resins and maleic acid anhydride graft modified PP and PE are used together with dried wood fibers for wood fiber composites WPC. But we have to keep in mind, that fiber length and modulus of the fiber is often NOT essential for the mechanical properties of the composite. Flax and aramide fibers are excellent as fibers, but it is very diffícult to use these qualities in engineered plastics. Best regards, Ralf Recknagel
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