TY - JOUR
T1 - Deformation and toughness of polymeric systems: 4 Influence of strain rate and temperature
AU - Sanden, van der, M.C.M.
AU - Meijer, H.E.H.
PY - 1994
Y1 - 1994
N2 - The influence of testing speed and temperature on the brittle-to-tough transition of non-adhering core-shell rubber-modified polystyrene-poly(2,6-dimethyl-1,4-phenylene ether) (PS-PPE) blends was studied. The validity of the concept of a network density dependent, critical matrix ligament thickness (IDc, as introduced in this series and verified mainly by slow-speed uniaxial tensile testing) is demonstrated for notched high-speed (1 m s-1) tensile testing at different temperatures. The influence of testing speed and temperature on the absolute value of IDc can be quantitatively understood in terms of a strain rate and temperature dependence of the yield stress. The simple model introduced in part 2 of this series proves to be valid under all testing conditions studied varying from temperatures of 50 to 150°C below the glass transition temperature of the PS-PPE blends. The absolute value of the tensile toughness, on the contrary, is a not yet quantified function of the test geometry applied and, consequently, cannot be directly derived from a simple strain-to-break argument.
AB - The influence of testing speed and temperature on the brittle-to-tough transition of non-adhering core-shell rubber-modified polystyrene-poly(2,6-dimethyl-1,4-phenylene ether) (PS-PPE) blends was studied. The validity of the concept of a network density dependent, critical matrix ligament thickness (IDc, as introduced in this series and verified mainly by slow-speed uniaxial tensile testing) is demonstrated for notched high-speed (1 m s-1) tensile testing at different temperatures. The influence of testing speed and temperature on the absolute value of IDc can be quantitatively understood in terms of a strain rate and temperature dependence of the yield stress. The simple model introduced in part 2 of this series proves to be valid under all testing conditions studied varying from temperatures of 50 to 150°C below the glass transition temperature of the PS-PPE blends. The absolute value of the tensile toughness, on the contrary, is a not yet quantified function of the test geometry applied and, consequently, cannot be directly derived from a simple strain-to-break argument.
U2 - 10.1016/0032-3861(94)90306-9
DO - 10.1016/0032-3861(94)90306-9
M3 - Article
VL - 35
SP - 2774
EP - 2782
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 13
ER -