Abstract
The low-deformation extension modulus was measured for Ca-alginate
gel fibers prepared from alginates of different compositions and
molecular weights. The modulus showed an increase with increasing
molecular weight for alginates of the same composition and sequence
parameters. Fibers prepared with an inhomogeneous polymer concentration
profile showed higher moduli than did fibers with a homogeneous polymer
concentration profile. The higher modulus observed for fibers prepared
from an alginate with low Ca2+ affinity is tentatively explained
as resulting from a higher degree of polymer chain alignment. (C)
1994 John Wiley & Sons, Inc.
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