Transcrystalline Interphase in Advanced Polymer Composites

摘要: Surface induced transcrystallization in fibers has been reported some advanced polymer composites. It is believed that the transcrystalline interphase may affect stress transfer efficiency between reinforcing fiber and matrix addition to exhibiting different mechanical properties from neat matrix. In this work, attempts were made examine effects of transcrystallinity on composite performance, particularly fiber/matrix interfacial bond strength, investigate possible attributes transcrystallization. Three resins investigated: polyetherketoneketone (PEEK), polyetheretherketone (PEEK) polyphenylene-sulfide (PPS); four types used: PAN-based AU-4 carbon, pitch-based PPDT aramid E-glass. found carbon induce a all three polymers, due an epitaxial effect. Under certain conditions, also observed E-glass fibers, which be partially attributed thermal conductivity mismatch Plasma treatment surface showed negligible effect inducing transcrystallization, whereas solution coating creating epitaxially-favored environment positive Mechanical test results, including microdebonding, flexural short beam shear tests, PEKK composites increases 5–25% with transcrystallinity. However, strength decreases as content