Preparation and mechanical properties of continuous long glass fiber/polyurethane composites
-
摘要: 以三羟基聚醚多元醇（PPG）、二苯基甲烷二异氰酸酯（MDI）作为软段和硬段，玻璃纤维（GF）为增强体，采用预聚体法制备自交联型GF/聚氨酯（PU）复合材料。借助旋转式黏度计、DMA、SEM、XRD和万能力学试验机等分析检测手段，研究了PU预聚体聚合温度、适用期、物相及GF含量等因素对GF/PU复合材料力学性能的影响。结果表明：PU预聚体聚合温度为50℃，GF含量为55wt%时，GF/PU复合材料综合性能最优，拉伸强度、弯曲强度和冲击韧性分别为794 MPa、846 MPa和228 kJ/m2，动态力学性能损耗因子（tanδ）峰值为0.59。Abstract: The prepolymer method was used to prepare the glass fiber reinforced self-crosslinking polyurethane (GF/PU) composites, in which three functional polyether polyol (PPG) and two phenyl methane diisocyanate (MDI) acted as the soft and hard segments, respectively. The effects of the polymerization temperature of PU prepolymer, pot-life of application, crystallinity and content of GF on the dynamic mechanical and mechanical properties of the GF/PU composites were studied by using rotating viscometer, DMA, SEM, XRD and mechanical testing machine. The results show that the GF/PU composites exhibit the highest performance comprehensive performance when the polymerization temperature of the PU prepolymer is 50℃ and the mass fraction of GF is 55wt%. The tensile strength, flexural strength, and impact toughness of GF/PU composite are 794 MPa, 846 MPa and 228 kJ/m2, respectively. The peak value of dynamic mechanical properties loss factor (tanδ) is 0.59.
-
Keywords:
- polyurethane /
- prepolymer method /
- glass fiber /
- composite /
- mechanical properties
-
-
计量
- 文章访问数: 1499
- HTML全文浏览量: 112
- PDF下载量: 446
下载:
