TY - JOUR

T1 - Viscosity and creep compliance of polyoxymethylene copolymers of various average molecular weights

AU - Gonzalez-Gutierrez, Joamin

AU - Oblak, Pavel

AU - Megen, Zerihum

AU - Emri, Igor

PY - 2015/10

Y1 - 2015/10

N2 - The effect of average molecular weight (Mw) of polyoxymethylene (POM) on melt viscosity and solid state creep compliance were investigated. Viscosity follows the power function of Mw. Creep compliance results indicate that time-temperature superposition applies to POM copolymers. Creep compliance in ashort time (0.25 s) is independent of Mw, but in a longer time (10 years) it follows an inverse power law relation with Mw, up to a critical value of Mw = 81 100, where creep compliance becomes independent of Mw. At intermediate time (17 min), similar to short one, no effect on susceptibility to creep compliance was observed. It was also stated that the activation energy is independent of Mw.

AB - The effect of average molecular weight (Mw) of polyoxymethylene (POM) on melt viscosity and solid state creep compliance were investigated. Viscosity follows the power function of Mw. Creep compliance results indicate that time-temperature superposition applies to POM copolymers. Creep compliance in ashort time (0.25 s) is independent of Mw, but in a longer time (10 years) it follows an inverse power law relation with Mw, up to a critical value of Mw = 81 100, where creep compliance becomes independent of Mw. At intermediate time (17 min), similar to short one, no effect on susceptibility to creep compliance was observed. It was also stated that the activation energy is independent of Mw.

U2 - 10.14314/polimery.2015.620

DO - 10.14314/polimery.2015.620

M3 - Article

VL - 2015

SP - 620

EP - 627

JO - Polimery/Polymers

JF - Polimery/Polymers

SN - 0032-2725

IS - 10

ER -