The gelation behaviour of a series of polystyrene (PS)-poly(vinyl methyl ether) (PVME) blends that had been exposed to electron beam radiation was determined. The gel fraction produced by electron beam irradiation of this blend was determined as a function of dose, blend composition and morphology. The effect of morphology was examined by irradiating miscible blends and blends that had been phase separated by spinodal decomposition. The results indicate that PS does not offer any protection from radiation crosslinking in the miscible blends. In fact, the addition of a small amount of PVME to pure PS greatly increased the gel content, suggesting that a significant amount of grafting is occurring between the blend components. Phase separation of these blends has been shown to significantly influence the effect of blend composition on the gel content, primarily by altering the localized composition of the blend.
Посилання на статтю:
Electron beam irradiation of polystyrenepoly( vinyl methyl ether) blends / Dale C. McHerron and Garth L. Wilkes* // Polymer. – 1993. – Vol 34. – P. 3976-3985.