In Situ SAXS-WAXS Temperature Evolution Study of the Nanostructure of Self-Reinforced Ultrahigh Molecular Weight Polyethylene

IF 2 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Physical Mesomechanics Pub Date : 2025-06-30 DOI:10.1134/S1029959924601490

E. S. Statnik, Yu. E. Gorshkova, A. I. Salimon, D. D. Zherebtsov, S. D. Kaloshkin, A. M. Korsunsky

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Abstract

Ultrahigh molecular weight polyethylene (UHMWPE) is a thermoplastic high-performance polymer, which is in high demand in biomedicine, ship and machine building, production of anthropomorphic robots and smart prostheses. Highly oriented UHMWPE fibers possess record specific strength and may be used for the fabrication of self-reinforced PE-PE composites (SRPECs). The temperature evolution study of the small-angle X-ray scattering (SAXS) signature of the supramolecular structure of UHMWPE can help reveal their important role in the mechanism of the shape memory effect in SRPECs. The laboratory XEUSS 3.0 SAXS-WAXS beamline was used for in situ studies of the nanostructure parameters in unidirectional SRPEC. In particular, the radius of gyration and the dimensionality factor were derived from 2D SAXS patterns using several fitting algorithms. These parameters change significantly in the temperature ranges corresponding to the initiation of the shape memory effect and melting. The relationship between the material anisotropy and 2D SAXS patterns is discussed in the context of the supramolecular structure evolution.

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自增强超高分子量聚乙烯纳米结构的原位SAXS-WAXS温度演化研究

超高分子量聚乙烯（UHMWPE）是一种热塑性高性能聚合物，在生物医药、船舶和机械制造、拟人机器人和智能假肢的生产中有着很高的需求。高取向超高分子量聚乙烯纤维具有创纪录的比强度，可用于制造自增强PE-PE复合材料（srpec）。超高分子量聚乙烯超分子结构的小角x射线散射（SAXS）特征的温度演化研究有助于揭示其在srpec中形状记忆效应机理中的重要作用。采用实验室XEUSS 3.0 SAXS-WAXS光束线对单向SRPEC的纳米结构参数进行了原位研究。特别地，利用几种拟合算法从二维SAXS模式中获得了旋转半径和维数因子。这些参数在形状记忆效应开始和熔化所对应的温度范围内变化显著。在超分子结构演化的背景下，讨论了材料各向异性与二维SAXS模式的关系。

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来源期刊

Physical Mesomechanics Materials Science-General Materials Science

CiteScore

3.50

自引率

18.80%

发文量

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related in the physical mesomechanics and also solid-state physics, mechanics, materials science, geodynamics, non-destructive testing and in a large number of other fields where the physical mesomechanics may be used extensively. Papers dealing with the processing, characterization, structure and physical properties and computational aspects of the mesomechanics of heterogeneous media, fracture mesomechanics, physical mesomechanics of materials, mesomechanics applications for geodynamics and tectonics, mesomechanics of smart materials and materials for electronics, non-destructive testing are viewed as suitable for publication.