Supplementary material from "Particle morphology, structure and properties of nascent ultra-high molecular weight polyethylene"

Published on 2020-08-01T08:30:35Z (GMT) by
The effects of particle morphology on the structure and swelling/dissolution and rheological properties of nascent ultra-high molecular weight polyethylene (UHMWPE) in liquid paraffin (LP) were elaborately explored in this article. Nascent UHMWPE with different particle morphologies was prepared via pre-polymerization technique and direct polymerization. The melting temperature and crystallinity of UHMWPE resins with different particle morphologies were compared, and a schematic diagram was proposed to illustrate the mechanism of UHMWPE particle growth synthesized by pre-polymerization method and direct polymerization. The polymer globules in the nascent UHMWPE prepared by using pre-polymerization technique are densely packed and a positive correlation between the particle size and the viscosity-averaged molecular weight can be observed. The split phenomenon of particles and the fluctuation in the viscosity of UHMWPE/LP system prepared by direct polymerization can be observed at a low heating rate and there is no correlation between particle size and viscosity-averaged molecular weight.

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Zhang, Wenyang; Wu, Zhengwen; Mao, Hanjun; Wang, Xinwei; Li, Jianlong; Mai, Yongyi; et al. (2020): Supplementary material from "Particle morphology, structure and properties of nascent ultra-high molecular weight polyethylene". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.5080083.v1