Paper number 685
|THERMAL CHARACTERIZATION OF LARC( PETI-5 AS A POTENTIAL HIGH TEMPERATURE SIZING MATERIAL|
Donghwan Cho1 and Lawrence T. Drzal2
1Department of Polymer Science and Engineering, Kumoh National University of Technology, Kumi, Kyungbuk 730-701 Korea
2Composite Materials and Structures Center, Michigan State University
East Lansing, MI 48824-1226 U.S.A.
|Summary||The glass transition, melting behavior, cure behavior, and thermal stability of LaRC PETI-5 have been extensively studied utilizing differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) in this publication. The data show that the thermal history for the imidization reaction may influence the extent of cure for the partially cured LaRC PETI-5. The reaction of the C-C bonds in the phenylethynyl groups located in the imide polymer chain ends is completed to produce a fully cured LaRC PETI-5 within one hour at 350°C in air. This study also demonstrates that no reaction takes place above 350°C prior to degradation. LaRC PETI-5 with a molecular weight of 2500 g/mol has excellent thermal stability up to 550°C and no significant loss of its integrity for extended periods of time below 450°C as long as it is fully imidized. Microscopic observations suggest that LaRC PETI-5 resin is useful as a high temperature sizing material, providing uniform fiber surface and good wettability to carbon fiber.
||Keywords|| phenylethynyl terminated imide oligomer, LaRC PETI-5, cure behavior, extent of cure, thermal stability.
Theme : Interface and Interphase
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