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Melt fracture and rheology of linear low density polyethylene ‐ calcium carbonate composites
Author(s) -
Barczewski Mateusz,
Lewandowski Krzysztof,
Schmidt Marcin,
Szostak Marek
Publication year - 2017
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24477
Subject(s) - materials science , linear low density polyethylene , composite material , stearic acid , rheology , calcium carbonate , polyethylene , filler (materials) , high density polyethylene , calcium stearate , dispersion (optics) , raw material , chemistry , physics , organic chemistry , optics
Rheological behavior and melt fracture of linear low‐density polyethylene (LLDPE) calcium carbonate (CaCO 3 ) composites were investigated. Two types of commercial inorganic fillers were used, unmodified and modified with stearic acid. Rheological capillary studies were conducted to assess the influence of inorganic filler incorporation as well as chemical treatment on the rheological properties and instability sequence of polyethylene‐based composites. Strong suppression of melt flow instabilities was observed for both types of composites. Mooney analysis was applied to examine the influence of mineral filler addition and stearic acid modification on the wall slip. Moreover, chemical treatment of calcium carbonate allows to obtain better dispersion of the inorganic filler in a polymeric matrix. POLYM. ENG. SCI., 57:998–1004, 2017. © 2016 Society of Plastics Engineers