摘要
通过单丝临界断裂长度法，研究了聚丙烯（ＰＰ）与玻璃纤维（ＧＦ）间界面剪切强度（ＩＳＳ），发现调节酸酐改性聚丙烯（ＭＰＰ）的加入量，可以相应调整ＩＳＳ；基体熔体与ＧＦ接触时间在８～１０ｍｉｎ以后界面才能结合完全。当ＩＳＳ小于４ＭＰａ时界面结合过弱，纤维在断口处与基体脱粘，形成空管状；ＩＳＳ高于７ＭＰａ时界面结合过强，纤维断口处基体产生垂直于纤维的裂缝，材料变脆；ＩＳＳ在４～７ＭＰａ时界面结合最佳，既不产生明显脱粘，也不产生向基体内扩张的裂缝。
On the basis of the analysis method of the critical fragment length of single fiber, the interfacial shear strength (ISS) of polypropylene (PP) / glass fiber (GF) composites is researched. It is found that adjusting the dosage of anhydride grafted polypropylene (MPP) can effectively change ISS. The interfacial bonding of the composite does not come up to a steady level until the contacting time of the melted PP with the fiber is longer than 810 min. When ISS is smaller than 4 MPa, the interfacial bonding is too weak and the fibers at both sides of the broken point are debonding with the matrix, forming a hollow tube. However, when ISS is higher than 7 MPa, the interfacial bonding is too strong and many cracks form, which lie in the matrix around the broken point of the fiber and in the vertical direction from the fiber axis. The composite becomes brittle. While ISS is among 4 and 7, the interfacial bonding lies in an optimum situation. Not only the debonding at the interface does not generate, but
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1999年第3期51-56,共6页
Acta Materiae Compositae Sinica
关键词
玻璃纤维
聚丙烯
界面剪切强度
复合材料
critical fragment length of single fiber, glass fiber, polypropylene, interfacial shear strengthalso these cracks extending into matrix do not form. The properties of macroscopic mechanics of the composites collaterally confirm this argument.
