need help!!!

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hi..there.i'm seek for your help.currently i'm doing research about low density polyethtylene(LLDPE)/natural rubber/clay(mmt) blends on it's mechanical properties.This research based on polymer nanocomposite which i conduct tensile and flexure test using ASTM 638 standard.But i need some information or past research some kind of thesis that have been done as my reference.i hope your guys help me which which expertise or currently study in polymer engineering.anyone know where i should to access some of research or thesis? thank you....