Bibliographic Details
| Title: |
Effects of aromatic diacetylenes on polyurethane degradation by gamma irradiation. |
| Authors: |
Burillo, Guillermina1, Beristain, Miriam F.2, Sanchez, Ernesto2, Ogawa, Takeshi2 ogawa@unam.mx |
| Source: |
Polymer Degradation & Stability. Oct2013, Vol. 98 Issue 10, p1988-1992. 5p. |
| Subjects: |
Butadiyne, Aromatic compounds, Polyurethanes, Chemical decomposition, Gamma rays, Tensile strength |
| Abstract: |
Abstract: The effects of four aromatic diacetylenes on the gamma-irradiation-induced degradation of a commercial polyurethane were studied. Addition of 1 wt% of diphenylbutadiyne, which is homogeneously distributed in the polymer, effectively suppressed the polymer chain degradation. The dose required to decrease tensile strength by 50% was found to be 582 kGy for the polyurethane with 1 wt% of diphenylbutadiyne, while a dose of only 310 kGy for the polyurethane itself. The Young's modulus of the polyurethane alone decreased with dose; meanwhile the films with diphenylbutadiyne did not change. The films with p,p′-dinitrodiphenylbutadiyne behaved differently from others due to their inhomogeneous composition. The amide substituted diacetylenes also showed protecting effect, but in less extent due to the steric effect. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
