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Effect of spherulites on the mechanical properties of nylon 66
Author(s) -
Starkweather Howard W.,
Brooks Richard E.
Publication year - 1959
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/app.1959.070010214
Subject(s) - spherulite (polymer physics) , crystallinity , materials science , nucleation , composite material , nylon 6 , elongation , ductility (earth science) , nylon 66 , yield (engineering) , flexural modulus , flexural strength , ultimate tensile strength , polymer , chemistry , polyamide , creep , organic chemistry
The presence of spherulites in nylon 66 increases the yield point and reduces the effects of variations in per cent crystallinity. Decreasing the size of the spherulites through increased nucleation results in a higher flexural modulus and yield point, a lower ultimate elongation, and a loss of ductility. These effects are markedly reduced by raising the temperature or water content. The effects of spherulite size in nylon and grain size in metals such as mild steel are compared.