Radii of gyration and screening lengths of polystyrene in toluene as a function of concentration

Abstract

Small-angle neutron scattering (SANS) experiments on solutions of polystyrene (PSH) and its deuterated homologue (PSD) in deuterated toluene have been performed over a wide range of concentration.Several redundant measurements demonstrated that the high-concentration technique of extracting single-chain scattering functions is highly reliable. Radii of gyration and screening lengths were fitted to power laws and were found to be R N c-".lW and f N c-".'O. The resulta differ significantly from predictions by scaling theory, though the dependence of E on c is in good accord with that previously found by other researchers. These experiments were also analyzed by using recent theoretical results of Muthukumar and Edwards. Measurements at different concentrations yielded a reasonably consistent value of the excluded volume interaction parameter.

Conformation and Interactions of Polystyrene and Fullerenes in Dilute to Semidilute Solutions

“…Fig 3d shows the background subtracted and fitted data for 1M PS (20k and 100k shown in Fig S6). 34 and Hamada et al 35 for PS/toluene solutions. The lower M w 20k PS data deviate from the scaling law of -0.77, unlike those of 100k and 1M.…”

Silica filled elastomers: polymer chain and filler characterization in the undeformed state by a SANS–SAXS approach

“…In [15,9,16,17,26] methods typically used for multicomponent solutions or blend were applied. In this way, the typical 2-phase-structure of a filled network is neglected completely.…”

Semi-empirical theory of the viscosity of moderately dilute polymer solutions

“…According to recent studies, notably by neutron scattering [5,6], an increase in c causes ($2) 3/2 to move monotonically toward the value ($2~ 3/z for the unperturbed chain. This change occurs because the overlapping of polymer coils screens intra-chain segmentsegment interactions.…”