Radiation-induced degradation of butyl rubber vulcanized by three different crosslinking systems |
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| Authors: | Sandra R. Scagliusi Elisabeth C.L. Cardoso Ademar B. Lugao |
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| Affiliation: | 1. Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China;2. College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, China;1. Water Research Group (WAREG), School of Environmental Engineering, University Malaysia Perlis, 02600 Arau, Perlis, Malaysia;2. School of Materials Engineering, University Malaysia Perlis, 02600 Arau, Perlis, Malaysia;1. Department of Polymer Technology, Chemical Faculty, G. Narutowicza Str. 11/12, Gdańsk University of Technology, 80-233 Gdańsk, Poland;2. Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box: 16765-654, Teheran, Iran;3. Department of Chemical Engineering, Universitat Politècnica de Catalunya Barcelona Tech, Terrassa, Spain;1. Department of Chemistry, Faculty of Science, King Mongkut’s University of Technology Thonburi, 126 Pracha-utid Road, Bangmod, Thongkru, Bangkok 10140, Thailand;2. Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering and Center for Advanced Research & Technology (CART), University of North Texas, 3940 North Elm Street, Denton, TX 76207, USA;3. Polymer Processing and Flow (P-PROF) Group, School of Energy, Environment and Materials, King Mongkut’s University of Technology Thonburi, 126 Pracha-utid Road, Bangmod, Thongkru, Bangkok 10140, Thailand;1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China;2. College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, China;1. Universidad Nacional de San Martin, UNSAM Campus Miguelete, 25 de Mayo y Francia (1650), San Martín, Buenos Aires, Argentina;2. Instituto Nacional de Tecnología Industrial (INTI), Av. Gral. Paz 5445 (1650), San Martin, Buenos Aires, Argentina;3. Centro de Tecnología de Recursos Minerales y Cerámica (CETMIC- CCT La Plata-CIC), Camino Centenario y 506, (1897), M.B. Gonnet, Argentina;4. Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, Laboratorio de Polímeros y Materiales Compuestos (LP&MC), Instituto de Física de Buenos Aires (IFIBA-CONICET), Buenos Aires, Argentina;5. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, (1033), Buenos Aires, Argentina |
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| Abstract: | Butyl rubber (IIR) is an isobutylene/isoprene copolymer and is provided with good properties including low permeability to gases, good thermal stability and high resistance to oxygen and ozone action, among others. It is well known that the major effect of ionizing radiations on butyl rubber is chain scission accompanied with a significant reduction in molar mass. This work aimed to study the effects of gamma radiation on the properties of butyl rubbers vulcanized by three different curing systems, such as, the ones based on sulfur, sulfur donor and phenolic resin to identify which curing system is the most stable under irradiation. The butyl rubber vulcanized by three different systems was gamma irradiated with doses of 25 kGy, 50 kGy, 100 kGy, 150 kGy and 200 kGy. Irradiated and non-irradiated samples were characterized by the following techniques: tensile, elongation and hardness. It was observed that doses higher than 150 kGy practically destroy the assessed properties for all butyl compounds, irrespective of the vulcanization system used; however compounds cured with phenolic resin showed a decrease in properties proportional to the dose. |
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