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(91) Calcium carbide, widely applied in synthesis of organic chemical products, such as benzene, rubber, polyvinyl chloride, and polyacetylene, is a main intermediate product of clean coal utilization.
(92) Graft reaction of the acryloyl chloride on polyvinyl alcohol in dimethyl sulfoxide was studied. The effect of concentration, temperature, time on grafting rate were discussed.
(93) The experiment condition to determine chloridion in cement and clinker with spectrophotography, using polyvinyl alcohol as protective colloid, was studied.
(94) A hollow fiber ultrafiltration membrane was prepared by using polyvinyl chloride (PVC) and polysulfone (PSF) blends and the dry wet spinning technology.
(95) This Standard supersedes polyvinyl chloride plastic sheets for waterproofing ( GB 12952 - 1991 ) .
(96) The experimental results showed that polyvinyl chloride could be chlorinated quickly by the plasma chlorination process at low temperature.
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