Internal Volume in Fibers

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Abstract
The amount and size distribution of internal volume, or pore space, is related to many important fiber properties such as diffusion, swelling, accessibility to reagents, and mechanical properties. A high-pressure mercury porosimeter has been applied to fibers to yield direct information about total pore volume and pore size distribution, and indirect information about the geometry of the pore structure. Results for a variety of natural and synthetic fibers are given. Examples are shown of pore structures arising from wet spinning, freeze-drying, and hot drawing in several experimental fibers.