Wyniki wyszukiwania:

Chitosan a useful natural polymer which was extracted from the naturally aboundant polymer Chitin has been further modified by reaction with cinnamoyl chloride and cinamoyl isothiocyanate to yield two derivatives with multiple chleating centers. These derivatives were found to be very efficient in chelating Cu,Ni,Co, Cr and Fe ions from their solutions. Different absorption isotherms have been investigated. The derivatives were charachterized by spectral tools. The thermal behavior was investigated by TGA analysis and the kinetic parameters of their thermal decomposition were calculated.

Environmental pollution is a major problem in developing countries like Egypt. Reuse of waste polymers is considered an attractive solution for environmental white pollution and reducing of the costs of road pavement and maintenance. This work show that how to prepare environmentally friendly hot mix asphalt (HMA) for paving. The prepared mixes consisted of high absorptive aggregate (not used in road paving), marble powder (discarded from workshops and factories) and waste polymers (as asphalt modifiers). To achieve this aim, asphalt cement of penetration grade 60/70 was modified with a...