Notes- γ-Irradiation of Polystyrene-d₁ and Styrene-d₁ Copolymers

Uses of Isotopes in Addition Polymerization

“…Copolymers of deuterated styrenes and methyl methacrylate have been irradiated and it was concluded that the styrene residues were attacked mostly at the «-position by radical fragments produced by decomposition of the ester side chain. With deuterated polystyrenes it was confirmed that radiation-initiated damage is not a simple function of the stability of a particular bond in the molecule although in this work rather higher values were obtained for the deuterium isotope effects (78). Irradiation of polymers of styrene-«-2, p-methylsty rene-«-H2, and p-methoxystyrene--H2 revealed that the backbones of substituted polystyrenes are less susceptible to radiation damage than polystyrene, but this could not be attributed to any enhanced susceptibility of the «-C-H bond (79).…”

Radical Copolymerization of Sulfur Dioxide and Styrene. II. Sequence Distribution in Poly(styrene sulfone)

“…T\so2sust + TStStSo2 = 2BmJiA + B) -2(1 -mj (6) Figures 3 and 4 show the plot of A/B vs. copolymer composition for the poly(styrene-/3-<¿2 sulfone) and poly-(styrene-of-d sulfone), respectively. The agreement between both A/B values is fairly good (within less than 15%), but we have calculated the distribution only from A/B value of poly(styrene-i3-d2 sulfone) since the peak separation between A and B is clearer than that in the case of a-d polymer.…”