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Indexed by:期刊论文

Date of Publication:2012-01-15

Journal:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Included Journals:SCIE、EI

Volume:532

Page Number:78-83

ISSN No.:0921-5093

Key Words:Polymer composites; Plasma; Interfaces; Aging; Humid resistance

Abstract:In this study the radio frequency oxygen plasma was used to strengthen the interfacial adhesion of PBO fiber/bismaleimide composite. The interlaminar shear strength (ILSS) was improved to 57 MPa or by 29% after treatment at 50W, but higher powers reduced the adhesion. The fiber surface chemistry, topography and roughness were analyzed by XPS and AFM, respectively. Oxygen atoms and polar groups were increasingly introduced onto the fiber surface, which contributed much to better wettability. The fiber surface was roughened by plasma sputtering and etching, generating many protuberances and notches. Results suggested that physical interactions between the fiber and the matrix might play leading roles in strengthening the adhesion. Aging behavior was not observed within the storage time of 1-50 days, which indicated that the plasma created stable structures on the fiber surface. After boiling the ILSS retained above 90%, confirming that the composite had good resistance to humidity. (C) 2011 Elsevier BM. All rights reserved.