The UNESCO School and Conference on Macromolecules & Materials Science is held annually in different locations in South Africa. World authorities in various fields of macromolecular science are invited to give tutorials at the UNESCO School and informative penuries at the conference. The exposure to new ideas and advanced concepts in macromolecular Science is of  great importance for South African students and senior staff alike coming from different universities and research institutions. The 6th UNESCO School & IUPAC Conference focused on polymer properties with a special session on the characterization of polyolefins. Abridged versions of a number of papers are compiled to create the present volume of Macromolecular Symposia.