Abstract:

Because conventional small molecular anti-ageing agent is liable to migration and volatilization, and moreover its migratory rate is to be evidently speeded up along with raise of temperature and postpone of aging time, anti-aging efficiency of the anti-aging agent will be thus significantly decreased. Additionally it is possible that the anti-aging agents drawn out from rubber produces will cause environment pollution, and damage the health of human being’s. Although butadiene styrene rubber (SBR) have the largest yield and consumption in synthetic rubber owe to the boom of global automobile industry, as a diene-rubber, its outstanding performance is closely related to aging degree of the rubber, so that it is press for adopting a long-term effective and non-migratory anti-ageing agent to improve SBR. In the paper, an intermediate of anti-aging agent was grafted onto the surface of silica, whose effect on anti-aging behaviors and thermal oxidation stability properties of SBR were studied in detailed by used activation energy analysis to the process of thermal oxidation aging and accelerating aging experimental etc.. The result show that RT-silica can dramatically improve oxidation induction period(OIT) and mechanical properties of SBR. Before extraction, the OIT of SBR/RT-silica composite can reach 42min, whereas the OIT of corresponding SBR/silica/4010NA composite is only 26min. After extraction, the OIT of SBR/RT-silica composite still keeps at a high level of 35min, but SBR/silica/4010NA composite drops to the level of SBR/silica composite without antioxidant, just 15min, its indicating that RT-silica does possesses excellent properties of resistance to thermal oxidation aging and migration.

Key words: natural rubber, microorganism coagulation, rheological properties; kinetics of vulcanization; mechanical properties; thermal degradation

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Biography:

Doctor Huang Guangsu is a full professor at College of Polymer Science and Engineering, Sichuan University, P.R.China. She obtained her bachelor degree of Polymer Chemistry Engineering from Sichuan University in 1982, and later received her master degree and doctor degree of polymer materials from the university. She is now a tutor of doctor students, head of polymer material department in Sichuan University, director of Rubber Association Society of Sichuan Province, and editing commissioner of 2 magazines. As the first author and corresponding author, Professor Huang has published more than 100 papers in international academic journals, and applied 15 Chinese invention patents among which 10 have been authorized.
In long-time career, her broad research area includes synthesis, characterization and processing of rubber, elastomer, coating, resin gel as well as physical property and aging, anti-aging research on corresponding materials. Recently, as principal of projects or tasks, Professor Huang has assumed or/and completed about 20 items of national natural science foundation projects, national science and technology major project and 973 project etc., from which she reaches fruitful achievements and simultaneously accumulates lots of experience and theory knowledge in rubber synthesis and processing, relationship of multi-level structures and properties, her current research interest concentrating on high performance and functionalization for rubber materials, as well as condensed state physics of rubber nanocomposite materials.