Different Behavior in Nonlinear Uniaxial Extension Behavior of Polyisoprene Melt and Solution

Download or read book Different Behavior in Nonlinear Uniaxial Extension Behavior of Polyisoprene Melt and Solution written by Feng Yi and published by . This book was released on 2018 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uniaxial extension is very fundamental experiment to research sample rheology behavior and the failure mode is valuable to focus on. My work mainly consists of two parts: extension rheology behavior of polyisoprene melt and solution. For PI melt, I used different molecular weight PI to do extension at different Rouse-Weissenberg number. The results show there are three type of failure mode: rupture, necking, tensile decohesion. The decohesion behavior disappears in the low molecular weight sample. PI also shows non-quiescent relaxation behavior.(Zhu and Wang 2013) For the solution part, I introduce extended oil add into melt to make a solution. By choosing different concentrations, we let melt and solution have the same number of entanglements per chain. After stretching at same WiR, we compare the strain-stress curves of melts and solutions.(Huang, Mednova et al. 2013)