منابع مشابه
Chemistry of rubber processing and disposal.
The major chemical changes during the processing of rubber occur with the breakdown in mastication and during vulcanization of the molded tire. There is little chemical change during the compounding, calendering, extrusion, and molding steps. Reclaiming is the process of converting scrap rubber into an unsaturated, processible product that can be vulcanized with sulfur. Pyrolysis of scrap rubbe...
متن کاملMultiscale estimation of the Freundlich adsorption isotherm
Adsorption plays an important role in water and wastewater treatment. The analysis and design of processes that involve adsorption rely on the availability of isotherms that describe these adsorption processes. Adsorption isotherms are usually estimated empirically from measurements of the adsorption process variables. Unfortunately, these measurements are usually contaminated with errors that ...
متن کاملA Critical Examination of Some Concepts in Rubber Chemistry.
A Critical Examination of Some Concepts in Rubber Scientific Books: Chemistry: DR. THOMAS MIDGLEY, JR. .............................. 143 The Rat in Laboratory Investigation: DR. C. E. The American Association for the Advancement of MCCLUNG. Stellar Dynamics: PROFESSOR BART J. Science: BOK . 160 The Twenty-sixth Annual Meeting of the Pacific Special Articles: Division. II: Edited by PROFESSOR J...
متن کاملThe Cyclization of Natural Rubber
The effects of solvent, temperature, time, weight percent of catalyst on the rate and mechanism of cyclization of natural rubber (NR) was studied in toluene and xylene solutions having tin tetra chloride catalyst (SnCl4). Iodometric titration show, with 8% SnCl4 (based on polymer weight) cyclization occurs, leaving 27.4% of the total unsaturation. Infrared spectra of c...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
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ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1938
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed015p99.2