complete devulcanization of sulfur\cured butyl rubber
Complete devulcanization of sulfur‐cured butyl rubber
Sulfur‐cured butyl rubber was devulcanized completely in supercritical CO 2 by using diphenyl disulfide (DD) as a devulcanizing reagent. The optimum devulcanizing conditions were studied and the sol fraction of the reclaimed rubber obtained was up to 98.5%.
Sulfur vulcanization is a chemical process for converting natural rubber or related polymers into materials of a variety of hardness, elasticity, and mechanical durability by heating them with sulfur or other equivalent curatives or accelerators.
Complete Devulcanization of Sulfur-Cured Butyl Rubber
In 2013, Jiang et al. (2013) analyzed the devulcanization of sulfur-cured butyl rubber with scCO 2 , by using DD as a devulcanizing reagent, in a high-pressure reactor. The highest value of sol
Influence of process variables on chemical devulcanization
Chemical devulcanization of sulfur cured natural rubber (NR) was investigated using benzoyl peroxide (BPO) as a devulcanizing agent. The influence of important reclaiming parameters such as reaction time, reaction temperature and concentration of the devulcanizing agent on the devulcanization process and mechanical properties of the resulting products were studied.
Vulcanization (British: Vulcanisation) refers to a range of processes for hardening rubbers. The term originally referred exclusively to the treatment of natural rubber with sulfur, which remains the most common practice; however, it has also grown to include the hardening of other (synthetic) rubbers via various means.
Vulcanization. Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.
Devulcanization of Scrap Tire Rubber with Supercritical CO2
Complete devulcanization of sulfur-cured butyl rubber by using supercritical carbon dioxide Feb 15, 2013 · Journal of Applied Polymer Science 2.19 # 1 Kuan Jiang (Huada: Beijing University of Chemical Technology) H-Index: 3
Determination of the structure of butyl rubber by NMR
Complete devulcanization of sulfur-cured butyl rubber by using supercritical carbon dioxide. Journal of Applied Polymer Science 2013, 127 (4) , 2397-2406. DOI: 10.1002/app.37542. M. Smith, S. Berlioz, J.F. Chailan. Radiochemical ageing of butyl rubbers for space applications.
Recycling of resin cured IIR-based ground bladder rubber
Wang, XJ, Shi, CP, Zhang, L. Effects of shear stress and subcritical water on devulcanization of styrene-butadiene rubber based ground tire rubber in a twin-screw extruder. J Appl Polym Sci 2013 ; 130: 1845 – 1854 .
Devulcanization of Waste Rubber and Generation of Active
Chem. devulcanization of sulfur cured natural rubber (NR) was investigated using benzoyl peroxide (BPO) as a devulcanizing agent. The influence of important reclaiming parameters such as reaction time, reaction temp. and concn. of the devulcanizing agent on the devulcanization process and mech. properties of the resulting products were studied.
The Mechanism of Phenolic Resin Vulcanization of Unsaturated
In the case of butyl rubber, these two competing reactions have been summarized in earlier reports. Tire curing bag (bladder) compounds are usually made of butyl rubber (IIR), a copolymer of isobutene and isoprene, with typically 1–5% of the diene monomer. Curing bags were originally manufactured using sulfur cures.
Tire Rubber Recycling with High-Performance Ultrasound
Ultrasonic Devulcanization of Tire Rubber. By ultrasonic devulcanization, sulfur-sulfur and sulfur-carbon chemical bonds in tires are decrosslinked, which results in a soft rubber melt. This ultrasonically generated rubber melt can be reprocessed and moulded into new rubber products, e.g. new tires.