complete devulcanization of sulfur\cured butyl rubber

  • 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

    Sulfur vulcanization

    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

    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

    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

    Vulcanization

    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

    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

    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

    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

    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

    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

    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

    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.