Surface segregation in model symmetric polyolefin diblock copolymer melts Mohan Sikka, Navjot Singh, Frank S. Bates, Alamgir Karim, Sushil Satija et Charles F. Majkrzak J. Phys. II France, 4 12 (1994) 2231-2248 DOI: 10.1051/jp2:1994258