TY - JOUR
T1 - Effects of electron beam irradiation on the property behaviour of poly(ether-block-amide) blended with various stabilisers
AU - Murray, Kieran A.
AU - Kennedy, James E.
AU - Barron, Valerie
AU - McEvoy, Brian
AU - Vrain, Olivier
AU - Ryan, Damien
AU - Cowman, Richard
AU - Higginbotham, Clement L.
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Radiosterilisation can induce modifications and/or degradation to transpire in poly(ether-block-amide) (PEBA) following irradiation. The current investigation utilises combined synergistic mixtures of stabilisers to minimise these effects, by melt blending them with the PEBA material. Hindered amine stabilisers (HAS), primary antioxidants and secondary antioxidants were the stabilisers incorporate to reduce/eliminate the effects of 50. kGy electron beam irradiation dose on the material. Results were discussed by comparing the stabilising efficiency of mixtures on the PEBA material in contrast to the control sample. Dynamic frequency sweeps demonstrated the formation of crosslinks, where the degree of crosslinking was dependent on the combination of stabilisers mixed in the base material (PEBA). The storage modulus displayed that PEBA blended with Irganox 565 had very slight changes in contrast to all other samples following irradiation. However, since this sample is a phenol containing system, severe discolouration was observed in comparison to other samples due to the oxidation of the hindered phenol. Overall, this study provides compelling evidence that a combined synergistic mixture of Irganox 565 (multifunctional phenolic antioxidant) and Tinuvin 783 (hindered amide light stabiliser) with PEBA, resulted in the best radiation stability.
AB - Radiosterilisation can induce modifications and/or degradation to transpire in poly(ether-block-amide) (PEBA) following irradiation. The current investigation utilises combined synergistic mixtures of stabilisers to minimise these effects, by melt blending them with the PEBA material. Hindered amine stabilisers (HAS), primary antioxidants and secondary antioxidants were the stabilisers incorporate to reduce/eliminate the effects of 50. kGy electron beam irradiation dose on the material. Results were discussed by comparing the stabilising efficiency of mixtures on the PEBA material in contrast to the control sample. Dynamic frequency sweeps demonstrated the formation of crosslinks, where the degree of crosslinking was dependent on the combination of stabilisers mixed in the base material (PEBA). The storage modulus displayed that PEBA blended with Irganox 565 had very slight changes in contrast to all other samples following irradiation. However, since this sample is a phenol containing system, severe discolouration was observed in comparison to other samples due to the oxidation of the hindered phenol. Overall, this study provides compelling evidence that a combined synergistic mixture of Irganox 565 (multifunctional phenolic antioxidant) and Tinuvin 783 (hindered amide light stabiliser) with PEBA, resulted in the best radiation stability.
KW - Crosslinking and chain scission
KW - Electron beam irradiation
KW - Mechanical
KW - Poly(ether-block-amide)
KW - Stabilisers
KW - Structural and surface properties
KW - Thermal
UR - http://www.scopus.com/inward/record.url?scp=84921454891&partnerID=8YFLogxK
U2 - 10.1016/j.radphyschem.2015.01.009
DO - 10.1016/j.radphyschem.2015.01.009
M3 - Article
AN - SCOPUS:84921454891
SN - 0969-806X
VL - 110
SP - 24
EP - 37
JO - Radiation Physics and Chemistry
JF - Radiation Physics and Chemistry
ER -