Jordan R. Nelson

Morphology of electrically conductive grades of carbon black

Abstract In recent years, several new types of highly electrically conductive (HEC) carbon blacks have been commercially introduced for use in plastic. Morphological features of these HEC carbon blacks are directly related to polymer melt rheology, proper loading concentration, resistivity and overall performance of the plastic composite. It was found that the unique mesoporous structure of these new HEC carbon blacks are primarily responsible for their success in Polyvinylchloride formulations.

PVC melt stability relationship to impurity chemistry of carbon black

Abstract A major concern for processing Polyvinylchloride filled with enough carbon black to make an electrically conductive plastic is maintaining sufficient compound melt stability for molding. Selective removal of various heteroatoms and impurities (e.g. oxygen, sulfur and inorganic salts) from carbon black indicates that excessive concentrations of either surface oxygen or iron grit adversely affects the melt stability of polyvinylchloride.