43聚合物基体 43聚合物基体 聚合物基体 聚苯硫隆(PPS) 热塑性基体 热固性基体 聚砜(PES) 聚酰胶、聚碳酸酚醛树脂 环氧树脂 不饱和聚酯 酯、聚砜、聚苯 硫醚、聚醚醚 聚PE◎ooc Important characteristics 44增强纤维 3. A very high degree of flexibility Flexibility The flexibility of a material is determined by shape, size of the cross section, and its radius of curvature We can use the inverse of the product of bending moment(M) and the radius of curvature (R)as a measure of flexibility. MR End Fiber diameter of materials with flexibility equal to that of
6 热塑性基体 酚酚酚酚 环环酚酚 不不不不不 热固性基体 不聚聚聚聚 聚酰胺、聚碳酸 酯、聚砜、聚苯 硫醚、聚醚醚 酮、氟塑料 4.3 聚合物基体 聚苯硫醚 (PPS) 聚砜 (PES) 聚醚醚酮 (PEEK) － S－ n O S = O = O －－ n － O C = O －－ n － O 4.3 聚合物基体 4.4 增强纤维 1. A small diameter 2. A high aspect ratio 3. A very high degree of flexibility Important characteristics Flexibility 4 1 64 MR Eπd = The flexibility of a material is determined by shape, size of the cross section, and its radius of curvature. We can use the inverse of the product of bending moment (M) and the radius of curvature (R) as a measure of flexibility. Fiber diameter of materials with flexibility equal to that of a 25-µm-diameter nylon fiber. d (µm) E (GPa) 100 200 300 400 500 25 20 15 10 5 0 nylon glassmullite Si3N4 C ZrO2 Al2O3 B SiC
44.1 Boron fibers硼纤维 A boron filament production facility Chemical vapor deposition(cVD)化学气相沉 2BX3+3H2 +6HX X: Cl, Br, or I BC/H2气相沉积 44.1硼纤维 44.2 Carbon fibers碳纤维 比重:2.34-2.6 拉伸强度:2.1-5lGPa 模量:-400GPa 碳合量在92-95%之间,桃量在34GPa以下的为碳纤维, 碳含量在9%以上,横量在J4GPa以上的为石曼纤维 Reaction zone 在1300°C左右热解的称碳纤维 在1900°以上热解的称石纤维 44.2碳纤維与石纤维 Ladder molecule z2座oe polyacrylonitrile 聚丙烯睛法 C≡N 石墨化
7 2BX3+3H2 2B+6HX X : C1, Br, or I 4.4.1 Boron Fibers 硼纤维 Chemical vapor deposition (CVD) 化学气相沉 积法 钨丝 卷取 加热 加热 预热 H2 BCl3/H2 气相沉积 A boron filament production facility 4.4.1 硼纤维 硼纤维的结构 比重：2.34 ~ 2.6 拉伸强度：2.1 ~ 5.1GPa 模量： ~ 400GPa Reaction zone W2B5+WB4 W SiC B 4.4.2 Carbon Fibers 碳纤维 碳含量在92~95%之间，模量在344GPa以下的为碳纤维， 碳含量在99%以上，模量在344GPa以上的为石墨纤维。 在1300°C左右热解的称碳纤维 在1900°C以上热解的称石墨纤维 4.4.2 碳纤维与石墨纤维 Oxidation up to 250°C Carbonization 250~1500°C Graphitization 1500~2500°C C C H H H C N C C H H H C N C C H H H C N C C H H H C N C C H H H C N C C H H H C N C C H H H C N C C H H H C N ∆ Ladder molecule polyacrylonitrile