Novel class of SBS polymers for enhanced effectiveness in bitumen modification

By applying special modifiers it is possible to adjust the structure of the Poly-butadiene block of SBS (Styrene-Butadiene-Styrene) block co-polymers. These polymers are by far the most widely used polymer in bitumen modification and account for about 65% of the total PMB market. The change of the structure is such that part of the double bonds that are characteristic for Poly-butadiene, are no longer in the backbone of the polymer, but transferred to branches on the backbone. This brings a number of advantages to the performance of the PMB such as lower viscosity and better compatibility at equivalent molecular weight and a better resistance to chain scission due to oxidation, hence better thermal stability. It has now also been proven that these polymers react more easily with bitumen to form bitumen-polymer grafts that are highly effective in performance enhancement and stimulating compatibility. Using the novel technique, a number of polymers have been developed that allow modification of bitumen with the worst compatibility parameters. It has also provided the possibility to modify relatively hard bitumen, which can be used in base courses, which allows an asphalt thickness reduction which will make the overall cost of laying asphalt lower and which would also save natural resources that are becoming scarcer. (a) For the covering record of the conference, please refer to ITRD no. E218387.

  • Corporate Authors:

    HALLMARK CONFERENCE AND EVENTS

    PO BOX 84
    HAMPTON,   Australia  3188
  • Authors:
    • VONK, W
    • SCHOLTEN, E J
    • KORENSTRA, J
  • Publication Date: 2009-10

Language

  • English

Media Info

  • Pagination: 9P (DAY 3, SESSION 2)
  • Monograph Title: Australian Asphalt Paving Association thirteenth international flexible pavements conference, Sunday 11th - Wednesday 14th October, Surfers Paradise, Queensland, Australia

Subject/Index Terms

Filing Info

  • Accession Number: 01153062
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Mar 23 2010 9:14AM