Part II. Polymers as coal-tar-pitch modifiers
Polimery 1998, No 1, 17
Literature reports and author's own papers are reviewed, covering polymer effects on the chemical and physical colloidal structure of coal tar pitch and on the compatibility of pitch-polymer blend constitutents. Preparation of homogeneous stable pitch-polymer blends is discussed in relation to the nature of the polymer used as pitch modifier. Coal-tar ahd petroleum pitches (bitumens) are compared as constituents of bitumen- polymer blends. Reduction of benzo[a]pyrene concentration through dilution of the coal-tar pitch with a polymer, suppresses cancerogenicity.
Keywords: polymer, bitumen, polymer-bitumen blends, compatibility, chemical structure