1. Confined crystallization in end-linked PEO network under uniaxial extension.
- Author
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Tian, Nan, Zhao, Baijin, Li, Xiangyang, Liu, Yanping, Zhou, Weiqing, Cui, Kunpeng, Liu, Dong, and Li, Liangbin
- Subjects
- *
CRYSTALLINE polymers , *POLYETHYLENE oxide , *POLYMER networks , *X-ray scattering , *CRYSTAL structure , *PHASE transitions - Abstract
Abstract: In this work extension induced crystallization of end-linked polyethylene oxide (PEO) network was investigated with in-situ small angle X-ray scattering (SAXS) and rheological measurement. The coupling between crystallinity and stress of crosslinked network makes the morphology time dependent. With a large strain the structure evolution in the stretched network is found to follow a two-stage process: i) crystals with high numerical density and small dimension form first, which laterally correlate with adjacent ones; ii) continuous melting and fusing of adjacent crystal happen after the first nucleation stage, leading to increase of crystal dimension and stability. Decreasing strain a gradual transformation to normal lamellae formation is found. Strain tuned confinement and crystallization induced confinement release is supposed to induce the structural change. [Copyright &y& Elsevier]
- Published
- 2013
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