High-density polyethylene crystals with double melting peaks induced by ultra-high-molecular-weight polyethylene fibre | Zendy

Weijun Miao | Zendy; Hao Zhu | Zendy; Tianchen Duan | Zendy; Hongbing Chen | Zendy; Feng Wu | Zendy; Libin Jiang | Zendy; Zongbao Wang | Zendy

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High-density polyethylene crystals with double melting peaks induced by ultra-high-molecular-weight polyethylene fibre

Author(s) -

Weijun Miao,

Hao Zhu,

Tianchen Duan,

Hongbing Chen,

Feng Wu,

Libin Jiang,

Zongbao Wang

Publication year - 2018

Publication title -

royal society open science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.84

H-Index - 51

ISSN - 2054-5703

DOI - 10.1098/rsos.180394

Subject(s) - materials science , high density polyethylene , polyethylene , differential scanning calorimetry , crystallization , composite material , ultra high molecular weight polyethylene , crystal (programming language) , orthorhombic crystal system , scanning electron microscope , layer (electronics) , polymer , crystallization of polymers , crystal structure , crystallography , chemical engineering , chemistry , physics , computer science , engineering , thermodynamics , programming language

High-density polyethylene (HDPE)/ultra-high-molecular-weight polyethylene (UHMWPE) fibre composites were prepared via solution crystallization to investigate the components of epitaxial crystal growth on a highly oriented substrate. Scanning electron microscopy morphologies of HDPE crystals on UHMWPE fibres revealed that the edge-on ribbon pattern crystals that were formed initially on UHMWPE fibres converted afterwards to a sheet shape as crystallization progressed. Wide-angle X-ray diffraction confirmed that the polymer chain oriented along the fibre axis and the orthorhombic crystal form of HDPE remained unchanged in HDPE/UHMWPE fibre composite systems. The thermal behaviour of the fibre composites measured by differential scanning calorimetry showed double melting peaks, the nature of which, as disclosed by partial melting experiments, is ascribed to bilayer components existing in the induced crystals: the inner layer is composed of more regularly folded chain crystals induced by UHMWPE fibres, and the outer layer formed on the inner one with a thinner and lower ordered crystal structure.

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