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Process for preparing macroporous open-cell carbon foam from normally crystalline vinylidene chloride polymer
Process for preparing macroporous open-cell carbon foam from normally crystalline vinylidene chloride polymer
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机译：由常结晶偏二氯乙烯聚合物制备大孔开孔碳泡沫的方法
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摘要
Activated, macroporous open-cell carbon foam which is particularly useful as a filter for cigarette smoke and the like, is prepared by contacting, at a temperature of at least about 25°C a normally crystalline vinylidene chloride polymer in substantially open- cell, macroporous foam form with liquid ammonia until at least about 50 percent of theoretical Cl.sup.- is removed, then heating said foam to a temperature sufficient to remove residual ammonium chloride.
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