芳纶纤维发展新动态

• 作 者: 过梅丽
• 机 构: 北京航空学院,
• 出 处: 复合材料学报
• 发表日期: 1988年01期
• 关键词: 芳纶纤维 力学性能 增强剂 尺寸稳定性 单向复合材料 纤维复合材料 增强复合材料 拉伸强度 芳族 热膨胀系数

自七十年代初期杜邦公司推出芳纶纤维Kevlar 29和Kevlar 49以来,模量较高的Kevlar 49已经成为聚合物基复合材料的重要增强剂而得到了广泛的应用。但是在复合材料的使用中发现,由于Kevlar 49的吸水性较强,用其增强的复合材料制件的力学性能和尺寸稳定性都受到明显的影响。最近,杜邦公司又推出了一种牌号为Kevlar 149的新型芳纶纤维,其最大的特点是弹性模量高,吸水率低(见表1)。从分子结构来看,Kevlar 149和Kevlar 49都是对位芳族聚酸胺。但X射线分析表明,

Since the early 1970s when DuPont introduced aramid fibers Kevlar 29 and Kevlar 49, the higher modulus Kevlar 49 has become an important reinforcing agent for polymer-based composites and has been widely used. However, in the use of composite materials, the mechanical properties and dimensional stability of Kevlar 49 are obviously affected by its strong water absorption. Recently, DuPont has introduced a new type of aramid fiber Kevlar 149, its greatest feature is the high modulus of elasticity, low water absorption (see Table 1). From the molecular structure point of view, Kevlar 149 and Kevlar 49 are para-aramid. However, X-ray analysis shows that,