Journal of Applied Polymer Science, Vol.80, No.12, 2140-2144, 2001
A study on HDPE/sulfonated EPDM-treated CaCO3 blends
In this article, sulfonated ethylene-propylene-diene monomer terpolymer (H-SEPDM) was used to treat CaCO3 particles. CaCO3 particles are encapsulated by H-SEPDM through the reaction of sulfonic acid group (-SO3H) in H-SEPDM with CaCO3 to improve the interface adhesion of CaCO3 with HDPE. In case the treated CaCO3 is blended with HDPE, a brittle-ductile transition occurs. The impact strength of the blend rises sharply at 25-30 wt % CaCO3, and amounts to more than 700 J/m, four times as high as that of HDPE at 30 wt % CaCO3, without much loss of its yield strength and modulus.