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Structure–microhardness correlation in blends of nylon 6/nylon 66 monofilaments
Author(s) -
Cagiao M. E.,
Ania F.,
Baltá Calleja F. J.,
Hirami M.,
Shimomura T.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(20000718)77:3<636::aid-app19>3.0.co;2-r
Subject(s) - crystallinity , materials science , indentation hardness , nylon 6 , composite material , annealing (glass) , microstructure , polymer
The microstructure (crystallinity, long spacing) and the micromechanical properties (microhardness H ) of two series of nylon 6 and nylon 66 monofilaments and their blends were investigated as a function of annealing temperature T A and uniaxial deformation in a wide composition range. In case of the homopolymers, the gradual rise of microhardness with T A is interpreted in the light of the increasing values of the crystallinity α and the hardness of the crystals H c . The depression of the hardness values of the blends from the additive behavior of the hardness of individual components is discussed in the basis of the crystallinity depression of one component by the second one and viceversa. Finally, the influence of drawing and pressing the blends at 130°C which leads to a hardness increase is also explained in the light of an increase in the H c value of nylon 66 due to orientation. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 636–643, 2000