期刊
RHEOLOGICA ACTA
卷 51, 期 8, 页码 755-769出版社
SPRINGER
DOI: 10.1007/s00397-012-0640-z
关键词
Polymer solution; Linear viscoelasticity; Nonlinear viscoelasticity; Extensional flow; Necking, Relaxation time
类别
资金
- ERC [203043-NANOFIB]
- Engineering and Physical Sciences Research Council (UK)
- industrial partners in the Innovation in Industrial Inkjet Technology project [EP/H018913/1]
- Engineering and Physical Sciences Research Council [EP/H018913/1] Funding Source: researchfish
- EPSRC [EP/H018913/1] Funding Source: UKRI
In this paper, we introduce an experimental protocol to reliably determine extensional relaxation times from capillary thinning experiments of weakly elastic dilute polymer solutions. Relaxation times for polystyrene in diethyl phthalate solutions as low as 80 mu s are reported: the lowest relaxation times in uniaxial extensional flows that have been assessed so far. These data are compared to the linear viscoelastic relaxation times that are obtained from fitting the Zimm spectrum to high frequency oscillatory squeeze flow data measured with a piezo-axial vibrator (PAV). This comparison demonstrates that the extensional relaxation time reduced by the Zimm time, lambda (ext)/lambda (z), is not solely a function of the reduced concentration c/c*, as is commonly stated in the literature: an additional dependence on the molecular weight is observed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据