title: Extensional rheometer for in situ x-ray scattering study on flow-induced crystallization of polymer.
abstract: We designed and constructed an extensional rheometer for in situ small and wide angle x-ray study on flow-induced crystallization of polymer. Two rotating drums with an axis distance of 20 mm are employed to impose extensional deformation on the samples. With a constant angular velocity, the two drums generate a constant Henkcy strain rate as sample length for testing keeps constant during deformation. An ionic liquid is used as heating medium to prevent polymer melt from bending downward due to gravity, which is excellent in terms of high thermal stability, low viscosity, and relative low adsorption on x-ray. Flow-induced crystallization experiments are conducted with this apparatus on x-ray scattering station in Shanghai Synchrotron Radiation Facility (SSRF), which allows us to collect rheological and structural data simultaneously and may lead to a better understanding on flow-induced crystallization of polymer.
authors.affiliation: National Synchrotron Radiation Laboratory and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Liu
authors.forename: Weiqing
authors.initials: W
authors.lastname: Zhou
authors.forename: Kunpeng
authors.initials: K
authors.lastname: Cui
authors.forename: Nan
authors.initials: N
authors.lastname: Tian
authors.forename: Xiao
authors.initials: X
authors.lastname: Wang
authors.forename: Liangbao
authors.initials: L
authors.lastname: Liu
authors.forename: Liangbin
authors.initials: L
authors.lastname: Li
authors.forename: Yingui
authors.initials: Y
authors.lastname: Zhou