摘要
微孔发泡材料的泡孔结构主要采用泡孔尺寸和泡孔密度来表征。泡孔尺寸一般使用SigmaScan和Image-pro两种图像分析软件测量,而泡孔密度主要用Kumar法和初始未发泡试样泡孔密度计算法计算。工艺条件的不同,特别是发泡温度、饱和压力、发泡时间、添加成核剂、引入另一聚合物相等工艺条件的改变,都会对发泡材料的泡孔形貌产生影响。发泡温度和饱和压力对泡孔形貌的影响尤甚,并且对泡孔结构的影响趋势是相同的,即随发泡温度或饱和压力的增加,泡孔结构由好变差,存在最佳值。加入合适的成核剂及引入另一聚合物相,亦能起到促进发泡的效果。
Cell structure of micro-porous foams is characterized mainly by cell size and cell densi-ty. The cell size is generally measured with the SigmaScan image analysis software and the Image-pro image analysis software, while the cell density is usually calculated by the Kumar calculation method and the initial unexpanded sample calculation method. The difference of technological conditions, especially changing foaming temperature, saturation pressure, foaming time, adding nucleating agent or introducing another polymer phase will affect cell structure of micro-porous foams. The foaming temperature and the saturation pressure are very crucial influential factors, and they have the same in-fluential trend on the cell structure： the cell structure gets worse with the increase in the foaming tem-perature or saturation pressure, and there is an optimum value for the cell structure. Besides, adding a suitable nucleating agents or introducing another polymer phase can also promote the foaming.
出处
《合成树脂及塑料》
CAS
北大核心
2014年第1期71-75,共5页
China Synthetic Resin and Plastics
关键词
微孔发泡
超临界二氧化碳
泡孔结构
工艺条件
microcellular foaming
supercritical carbon dioxide
cell structure
technological condition
