[KSCI] Korea Science Citation Index Service

Nondestructive Microfailure and Interfacial Evaluation of Plasma-Treated PBO and Kevlar Fibers/Epoxy Composites using Micromechanical Test and Acoustic Emission

박종만 (경상대학교 응용화학공학부 고분자공학전공, 항공기부품기술연구센터)
김대식 (경상대학교 응용화학공학부 고분자공학전공, 항공기부품기술연구센터)
김성룡 (충주대학교 고분자공학과)

Publication Information

Composites Research / v.16, no.4, 2003 , pp. 74-79 More about this Journal

Abstract

Comparison of interfacial properties and microfailure mechanisms of oxygen-plasma treated poly(p-phenylene-2,6-benzobisoxazole(PBO. Zylon) and poly(p-phenylene terephthalamide)(PPTA, Kevlar) fibers/ epoxy composites were investigated using micromechanical technique and nondestructive acoustic emission(AE). Interfacial shear strength(IFSS) and work of adhesion, Wa of PBO or Kevlar fibers/epoxy composites increased by oxygen-plasma treatment. Plasma-treated Kevlar fiber shooed the maximum critical surface tension and polar term, whereas the untreated PBO fiber showed the minimum value. Microfibril fracture pattern of plasma-treated Kevlar fiber appeared obviously. Based on the propagation of microfibril failure toward core region. the number of AE events for plasma-treated PBO and Kevlar fibers increased significantly. The results oi nondestructive AE were consistent well with microfailure modes by optical observation in microdroplet and two-fiber composites tests.

Keywords

Interfacial shear strength; Microfailure mechanisms; Oxygen-plasma treatment; Surface wettability; Nondestructive evaluation;

Citations & Related Records

Reference

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