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Abstract
The mean-square radius of gyration [S2 ] and second virial coefficient A2 are determined from static light scattering (LS) measurements for six samples of poly(di-tert-butyl fumarate) (PDtBF) for a range of weight-average molecular weight Mw from 4.35 × 104 to 1.73 × 105 in tetrahydrofuran at 30.0 °C. The intrinsic viscosity [[eta]] and translational diffusion coefficient D are also determined from viscosity and dynamic LS measurements for those samples under the same solvent conditions. From a simultaneous analysis of [S2 ] and A2 based on the Kratky-Porod (KP) wormlike chain with excluded volume, the stiffness parameter [lamda]-1 and the reduced excluded-volume strength [lamda]B are determined to be 350 Å and 0.024, respectively, where we assume the shift factor ML for PDtBF to be 101 Å-1 on the analogy of the main-chain structure of poly(diisopropyl fumarate) previously studied. For PDtBF with such a large [lamda]-1 , it is found that the intramolecular excluded-volume effect for [S2 ] is negligibly small in the range of Mw examined. As for [[eta]] and D, their behavior may be well explained by the corresponding KP theories using the model parameter values consistent with those determined from [S2 ] and A2 , and the intramolecular excluded-volume effect for them can be ignored, as in the case of [S2 ].