基于HDPE的多组分复合材料的微观结构和力学性能研究。

IF 1.8 4区 化学 Q3 POLYMER SCIENCE
Yazhen Wang, Chenglong Wang, Shaobo Dong, Liwu Zu, Tianyu Lan
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引用次数: 3

摘要

制备了玄武岩纤维(BF)和聚酰胺6 (PA6)增强HDPE复合材料;研究了纤维、有机填料和极性组分马来酸酐(MA)的加入对复合材料微观组织特性的影响。微观结构表征表明,双分散相(PA6/BF)为核壳结构,组分PA6包覆组分BF,包覆程度随MA的加入而减小。通过SEM观察和理论计算,证实了其微观结构与构件的界面张力有关。研究了多组分对复合材料结晶行为的影响。差示扫描量热仪(DSC)分析显示HDPE微观结构发生了显著变化。结果表明,PA6和BF作为成核剂,在冷却过程中加速了结晶速度。采用Jeziorny法、Avrami-Ozawa法和Kissinger法分析了结晶动力学和活化能。结果表明,在退火过程中,MA显著改变了HDPE基体的晶体生长机制,使其向非均质成核方向生长,形成针状和板状晶体。当MA含量为3 wt %时,BF/PA6/HDPE复合材料的结晶度和结晶度最低。此外,观察到力学性能明显改善(61%),并详细讨论了其机理。增韧的机理不是单一的,而是多种机理共同作用的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The study on microstructure and mechanical properties of multi-component composite based on HDPE.

The study on microstructure and mechanical properties of multi-component composite based on HDPE.

The study on microstructure and mechanical properties of multi-component composite based on HDPE.

The study on microstructure and mechanical properties of multi-component composite based on HDPE.

The basalt fiber (BF) and polyamide 6 (PA6) reinforced HDPE composite were prepared; the effects of adding fiber, organic filler, and polar component maleic anhydride (MA) on the microstructural characteristics of composites were investigated. Microstructural characterization evidenced the binary-dispersed phase (PA6/BF) is of a core-shell structure in which the component PA6 encapsulates component BF, and the extent of encapsulates would decline with the MA adding. It is confirmed that the microstructure is related to the interfacial tension of components by the SEM observation and theoretical calculation. The effect of multi-component on the crystallization behavior of composites was investigated. Differential scanning calorimeter (DSC) analyses showed a significant change in the HDPE microstructure. It demonstrated PA6 and BF as a nucleation agent accelerated the crystallization rate under the cooling process. The corresponding crystallization kinetics and activation energy were further analyzed using the Jeziorny method, Avrami-Ozawa method, Kissinger method. The results showed MA markedly changed the crystal growth mechanism of the HDPE matrix to heterogeneous nucleation for acicular and tabular crystal growth during the annealing step. The lowest crystallinity energy and crystallinity were observed for BF/PA6/HDPE composites with 3 wt % MA. Furthermore, a clear improvement of mechanical properties (by 61%) were observed, which mechanism is discussed in detail. The mechanism of toughening is not only one, but the result of a variety of mechanisms together.

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来源期刊
Designed Monomers and Polymers
Designed Monomers and Polymers 化学-高分子科学
CiteScore
3.30
自引率
0.00%
发文量
28
审稿时长
2.1 months
期刊介绍: Designed Monomers and Polymers ( DMP) publishes prompt peer-reviewed papers and short topical reviews on all areas of macromolecular design and applications. Emphasis is placed on the preparations of new monomers, including characterization and applications. Experiments should be presented in sufficient detail (including specific observations, precautionary notes, use of new materials, techniques, and their possible problems) that they could be reproduced by any researcher wishing to repeat the work. The journal also includes macromolecular design of polymeric materials (such as polymeric biomaterials, biomedical polymers, etc.) with medical applications. DMP provides an interface between organic and polymer chemistries and aims to bridge the gap between monomer synthesis and the design of new polymers. Submssions are invited in the areas including, but not limited to: -macromolecular science, initiators, macroinitiators for macromolecular design -kinetics, mechanism and modelling aspects of polymerization -new methods of synthesis of known monomers -new monomers (must show evidence for polymerization, e.g. polycondensation, sequential combination, oxidative coupling, radiation, plasma polymerization) -functional prepolymers of various architectures such as hyperbranched polymers, telechelic polymers, macromonomers, or dendrimers -new polymeric materials with biomedical applications
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