Ferreira, A. E.Cerrada, M. L.Pérez, ErnestoLorenzo, V.Vallés, E.Ressia, J.Cramail, H.Lourenco, J. P.Ribeiro, M. R.2017-03-102017-03-102017Ferreira, A. E.; Cerrada, M. L.; Perez, E.; Lorenzo, V.; Valles, E.; Ressia, J.; Cramail, H.; Lourenco, J. P.; Ribeiro, M. R.UHMWPE/HDPE in-reactor blends, prepared by in situ polymerization: Synthetic aspects and characterization, Express Polymer Letters, 11, 5, 344-361, 2017.1788-618XAUT: JLO01215;http://hdl.handle.net/10400.1/9038This work covers the synthesis and characterization of in-reactor Ultra-High Molecular Weight Polyethylene/ High Density Polyethylene, UHMWPE/HDPE, blends by in situ polymerization in a single reactor, through dual catalyst immobilization. These blends are synthesized combining two different catalysts (one for each targeted molar mass) co-immobilized in mesoporous Santa Barbara Amorphous, SBA-15, particles. First, the ethylene polymerization behavior is investigated, under different polymerization conditions. Then, studies on the thermal, mechanical and rheological characteristics of the produced in-reactor blends are presented and their performance is compared and discussed in a comprehensive way. Moreover, the effect of different filler contents on the properties exhibited by the resulting materials is investigated. Results have shown that these in-reactor UHMWPE/HDPE blends exhibit a complex thermal, mechanical and rheological behavior, which depends mainly on the proportion between the two polymer components and on the amount of SBA-15.engPolymer compositesIn-reactor blendsUHMWPEjournal article2017-03-09https://doi.org/10.3144/expresspolymlett.2017.34