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论文类型：期刊论文
发表时间：2014-06-30
发表刊物：APPLIED SURFACE SCIENCE
收录刊物：SCIE、EI、Scopus
卷号：305
页面范围：630-637
ISSN号：0169-4332
关键字：PBO/BMI composite; Interfacial adhesion strength; Mixed 02/Ar plasma; Synergy effect
摘要：The mixed 02/Ar plasma was employed to enhance mechanical properties of the PBO/bismaleimide composite. The interlaminar shear strength was improved to 61.6 MPa or by 38.1%, but the composite brittleness increased. The plasma gas compositions exhibited notable effects on the interfacial adhesion strength. XPS results suggested that the mixed plasma presented higher activation effects on the surface chemical compositions than pure gas plasmas and a larger number of oxygen atoms and hydrophilic groups were introduced on the fiber surface due to the synergy effect, but the synergy effect was considerably performed only within the 02 percentage range of 40-60%. The fibers surface was increasingly etched with growing the 02 contents in the plasma, deteriorating the fibers tensile strength. SEM micrographs demonstrated that the composite shear fracture changed from debonding to cohesive failure in the matrices, and the improving mechanisms were discussed. 2014 Elsevier B.V. All rights reserved.