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Relationships between mechanical properties and relaxation processes in polymers. Nylon 6
Author(s) -
Garbuglio C.,
Ajroldi G.,
Casiraghi T.,
Vittadini G.
Publication year - 1971
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.1971.070151015
Subject(s) - ultimate tensile strength , materials science , izod impact strength test , yield (engineering) , composite material , brittleness , elongation , nylon 6 , relaxation (psychology) , modulus , tensile testing , polymer , flexural strength , dynamic mechanical analysis , psychology , social psychology
The dynamic‐mechanical properties as a function of temperature and frequency were measured for five samples of polycaprolactam (nylon 6) containing different amounts of hydrosoluble products. Low‐ and high‐speed tensile properties and Izod impact strength were determined between −190° and 100°C for the same samples by using autographic methods. The influence of the mechanical relaxation processes on moduli, yield strength σ y , yield strain ε y , tough‐brittle transition temperature, elongation at break ε R , and tensile and Izod fracture energies was investigated. It has been found that some mechanical properties, such as modulus and yield properties, can be directly related to specific relaxation phenomena, whereas as far as other properties, such as the ultimate properties, are concerned, the existing correlation can be concealed by the interference of purely mechanical phenomena which depend on the testing technique used, the testing conditions, and the previous history of the material.