【摘要】 使用丁酮和二甲基甲酰胺配备混合溶剂,用于溶解稀释聚氨酯,并采用湿法成膜方法制备了聚氨酯微孔膜。通过调整溶剂的配比和凝固浴温度,研究了溶剂比例和凝固浴温度对成膜性能的影响。结果表明,随丁酮添加量的逐渐减少,凝固浴温度的增加,薄膜的孔隙率与透湿性呈现复杂的变换趋势,所以采用丁酮控制薄膜性能时,使用条件非常重要。更多还原

【Abstract】 MEK is used as one of solvents to make PU microporous film with hytrochemistry method.The effects of the rate of DMF/MEK and the temperature of condensing bath on the properties of PU films are studied.The conclusions are made that porosity shows a trend of increase with the ratio increases but a little decrease at the ratio reach to 2.5 and the WVT shows a trend of decrease ten increase with the temperature increases but a little decrease at 21℃.更多还原