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Influence of HMW tail chains on the structure evolution of HDPE induced by second melt penetration

Abstract

It is widely accepted that the role of the high molecular weight (HMW) component is cooperative in shear-induced crystallization, owing to the entanglements among long chains. However, this paper demonstrated that the HMW component has a novel effect on the structure evolution in the process of multi-melt multi-injection molding (M3IM), by organizing as follows. First, the appropriate HDPE system with incremental concentration of HMW tail was established; second, the crystalline morphologies and orientation behavior of M3IM samples were characterized by a combinative use of scanning electron microscope (SEM), two-dimensional small angle scattering (2D-SAXS), which suggested that the amount of shish-kebabs wasn’t monotonically promoted with the content of HMW tail increasing but tended to reduce at a certain value; third, in order to explain this phenomenon, the special temperature and shear profile of M3IM were depicted subsequently; finally, the mechanism of hierarchical structure formation with the influence of various amount of HMW tail was discussed, based on the classical rheological viewpoint.

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Publication details

The article was received on 01 Apr 2017, accepted on 15 Jun 2017 and first published on 15 Jun 2017


Article type: Paper
DOI: 10.1039/C7CP02104F
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Influence of HMW tail chains on the structure evolution of HDPE induced by second melt penetration

    C. Zhu, X. Xia, Y. Huang, D. Xie, R. Chen and M. Yang, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP02104F

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