tshouldratherbedefinedbytheirsurfacepropertieswithrespecttothematrixchemistry[].Whenpolymer–fillerinteractionisstrong,anadsorbedpolymerlayermaybeformedonthefillersurface.Inthiscase,atthesamelevelofvolumefractionasinnon-interactingparticles,theinteractionswillinduceamuchlargerstressinthematrixofthecompositeandthereforeinduceamuchlargerreinforcingeffect.Thisisthereasonwhythereisagreatinterestinincorporatingsmall-scalemineralparticlesintopolymercompositessuchastheso-callednanocomposite.Althoughthecausesofthemaximumvolumeconcentrationremaintobedebatable,thischaracteristiccanbeobtainedexperimentallyiftheprocessingpropertiesexhibitdiscontinuoustransitionoverthevolumeconcentration.Variousconcentrationregimesforthepropertiesofpolymer–mineralsystemshavebeendefinedaccordingtothevolumefraction,suchasdilute,semi-dilute,concentratedandhighlyconcentrated合物熔体粘度,以便填料效应会因维里系数计算困难而中断ηs=η/η=+[η]φ+kHφ+⑴其中ηs是相对粘度,η是悬浮液粘度