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Vulcanization characteristics of asphalt/SBS blends in the presence of sulfur
Author(s) -
Wen Guian,
Zhang Yong,
Zhang Yinxi,
Sun Kang,
Chen Zhiyong
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1932
Subject(s) - vulcanization , sulfur , materials science , curing (chemistry) , copolymer , styrene butadiene , activation energy , natural rubber , rheometer , asphalt , polymer chemistry , arrhenius plot , composite material , styrene , polymer blend , chemistry , organic chemistry , polymer , rheology , metallurgy
The vulcanization of asphalt/styrene–butadiene–styrene (SBS) triblock copolymer blends in the presence of elemental sulfur was followed with a strain‐controlled rheometer. The vulcanization of the blends took place at temperatures greater than 140°C. From 150 to 180°C, the curing rate of the blends increased significantly with increasing temperature, and the apparent activation energy of vulcanization was 45.2 kJ mol −1 . A suitable processing temperature for good mechanical and thermally stable properties was between 170 and 180°C. Both the structure of SBS and the sulfur level had important effects on the vulcanization of the blends. A plot of the electric current versus time showed the process of the dynamic vulcanization of the blends. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 989–996, 2001