title: Rheological and NMR studies of polyethylene/calcium carbonate composites.
abstract: Rheometry, 13C CP/MAS NMR spectra and 1H spin-lattice relaxation times T1 and T1rho have been employed to study the structure and molecular dynamics in composites of polyethylene (LDPE) with calcium carbonate filler. It has been found that the addition of the filler into the polymer leads to an increase in composite rigidity and a decrease in mobility in its crystalline regions. The presence of the filler affects the crystallization process making the crystal structure less perfect and reduces the size of the crystallites.
authors.affiliation: Department of Macromolecular Physics, Institute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland.
authors.forename: G
authors.initials: G
authors.lastname: Nowaczyk
authors.forename: S
authors.initials: S
authors.lastname: Głowinkowski
authors.forename: S
authors.initials: S
authors.lastname: Jurga
mesh_terms: D002119:Calcium Carbonate / Q000737:chemistry*; D002247:Carbon Isotopes; D004548:Elasticity; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008420:Manufactured Materials / Q000032:analysis*; D008422:Materials Testing / Q000379:methods*; D008968:Molecular Conformation; D020959:Polyethylene / Q000737:chemistry*; D011522:Protons; D012212:Rheology / Q000379:methods*; D033081:Shear Strength; D013696:Temperature; D014783:Viscosity
chemical_list: D002247:Carbon Isotopes; D011522:Protons; D020959:Polyethylene; D002119:Calcium Carbonate