MECHANICAL-PROPERTIES OF POLYMERS FILLED WITH ALKYL DIHYDROGEN PHOSPHATE TREATED CALCIUM-CARBONATE

Poly(ethylene) (PE) or poly(ethylene-co-vinyl acetate) (EVA) and alkyl dihydrogen phosphate ester (APEn, C(n)H2n+1OPO(OH)2, n = 1, 4, 10, 12, 16) treated calcium carbonate (CaCO3) were mixed on a two roll mill. In order to improve the affinity of polymer-CaCO3 interface, the CaCO3 surface was treated through chemical reaction with various APEn types. The effect of carbon number of APEn on the tensile elongation and the adhesion properties between CaCO3 particles and polymer matrix was investigated. In the case of PE/CaCO3 series, tensile elongation, modulus of oriented samples and adhesion of polymer-CaCO3 interface increased with carbon number of APEn (n less-than-or-equal-to 12). In the EVA/CaCO3 series, the dependence of the tensile elongation on the carbon number of APEn was not clearly recognized; the adhesion at the phase interface was improved with the decrease of carbon number of APEn (n less-than-or-equal-to 12).