Interdiffusion and adhesion at the inteface of a polystyrene-poly(2,6-dimethyl-1,4-phenylene oxide) blend below the glass transition temperature |
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Authors: | Yuri M Boiko Robert E Prud'homme |
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Institution: | (1) Fracture Physics Department, A. F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg, Russia;(2) Centre de recherche en sciences et ingenierie des macromolecules, Laval University, Sainte-Foy, Quebec, Canada |
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Abstract: | Experiments on adhesion between the film surfaces of a polystyrene (PS)-poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) blend
were carried out below the glass transition temperature of the bulk (T
g
), at T=T
g
−13 and T=T
g
−23°C. The contact time varied from 2 to 1440 min. The strength at the interface was then measured at room temperature. The
strength at the blend-blend interface was calculated using an additive diffusion model which takes into account the strength
at homopolymer-homopolymer interfaces (PS-PS, PS-PPO, and PPO-PPO), surface concentration of components, and its variation
with depth. A fair agreement between the calculated and measured strength was found. The results of the study support the
concept of decreasing glass transition temperature near the surface of polymer glasses as compared with T
g
of the bulk.
Translated from Mekhanika Kompozitnykh Materialov, Vol. 35, No. 5, pp. 661–670, September–October, 1999. |
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Keywords: | polystyrene poly(2 6-dimethyl 1 4-phenylene oxide) interface interdiffusion strength |
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