Mechanical properties of substituted, rigid-rod aramids in the highly-ordered solid state

In order to understand the nature of kink band formation in high performance fibers, the compression behavior of pitch and PAN-based carbon fibers (P75S, T-50, T-300, and GY-70), and of polymeric fibers (DuPont Kevlar; PBZR and PBO) was measured using a micro-scale compression apparatus in a n optical microscope. With increasing compressive strain, kink band formation was observed and the number of kink bands per unit length (referred to as kink band density) was determined. By extrapolating to zero kink band density, the critical compressive strain for rigid-rod polymeric fibers was obtained and compared to that of the carbon fiber. Using the Euler buckling equation, a fundamental dimension of the buckling element for the compression of PBO and PBZT fibers was calculated to be a 0.42-0.57 pm diameter fibril, and not the smaller diameter microfibrils.

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Microstructure analysis of high performance fibers in compression

Huh

Kumar

Adams

2003

Polymer Engineering & Sci

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Mechanical properties of substituted, rigid-rod aramids in the highly-ordered solid state

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References 22 publications

Microstructure analysis of high performance fibers in compression

Microstructure analysis of high performance fibers in compression

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