Poly (2-acrylamido-2-methyl propane sulfonamide) (PASAM) is a new, neutral polymer which is soluble in water and formamide. Fundamental parameters obtained previously by light scattering, osmometry and viscometry in these good solvents have been analysed by extrapolation procedures to yield the unperturbed dimensions ((r 2 )o/Mw)1/2, steric factor a and characteristic ratio C~o. 0-Conditions were established as water/dioxane (81.5/ 18.5 v/v ) at 298 K and verified by osmometry and viscometry. There was good accord between the values of ((r 2 >o/M,)1/2, tr and C~ thereby obtained directly and those derived indirectly, the mean values being 8.73 x 10 -9 cm gl/2 mo11/2, 4.07 and 32 respectively. The temperature coefficient of the unperturbed dimensions was - 5.5 x 10- 4 K- 1. The high rigidity of the PASAM chain is discussed.
Посилання на статтю:
Unperturbed dimensions of poly (2-acrylamido-2-methyl propane sulfonamide) / Shaban R, Gooda and Malcolm B, Huglin // Polymer. – 1993. – Vol 34. – P. 1913-1917.