基于NR和铁氧体锶的磁性复合材料

IF 0.9 Q4 CHEMISTRY, MULTIDISCIPLINARY Acta Chimica Slovaca Pub Date : 2019-04-01 DOI:10.2478/acs-2019-0010
J. Kruželák, Andrea Kvasničáková, R. Dosoudil, I. Hudeč
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引用次数: 1

摘要

本文对两种基于天然橡胶(NR)和锶铁氧体的复合材料进行了试验研究。第一种类型的复合材料是通过在纯NR基橡胶基体中掺入浓度范围为0-100phr(每百橡胶份数)的锶铁氧体来制备的,而对于第二种类型的材料,将相同浓度水平的锶铁素体掺入具有恒定量的炭黑-25phr的NR基橡胶批次中。对于橡胶基质交联,使用标准的硫基固化体系。研究了磁性填料含量对复合材料物理力学、磁学和热学性能的影响。随后,对交联密度和所形成的硫化交联的结构进行了检查。结果表明,两种类型的复合材料的交联密度都随着磁性填料含量的增加而增加,而硫化交联的结构几乎不受锶铁氧体含量的影响。铁氧体的加入略微提高了纯橡胶基橡胶复合材料的抗拉强度,而在炭黑基复合材料的情况下,磁性填料的加入导致了这一特性的降低。两种类型的复合材料中都存在磁性填料,导致残余磁感应显著增加。
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Magnetic composites based on NR and strontium ferrite
Abstract Two types of composites based on natural rubber (NR) and strontium ferrite were tested in this study. Composites of the first type were prepared by incorporation of strontium ferrite in the concentration range ranging from 0 to 100 phr (parts per hundred rubber) into pure NR based rubber matrix, while with those of the second type, strontium ferrite was dosed in the same concentration level into NR based rubber batch with constant amount of carbon black — 25 phr. For rubber matrices cross-linking, a standard sulfur based curing system was used. This work is focused on the effect of magnetic filler content on physico-mechanical, magnetic and thermo-physical properties of composite materials. Subsequently, the cross-link density and the structure of the formed sulfidic cross-links were examined. The results showed that the cross-link density of both types of composites increased with the increasing content of magnetic filler, while the structure of the sulfidic cross-links was almost not influenced by the amount of strontium ferrite. Tensile strength of rubber composites with pure rubber matrix was slightly improved by the incorporation of ferrite, while in case of composites based on a carbon black batch, the incorporation of magnetic filler resulted in the decrease of this characteristic. The presence of magnetic filler in both types of composites leads to a significant increase of the remanent magnetic induction.
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来源期刊
Acta Chimica Slovaca
Acta Chimica Slovaca CHEMISTRY, MULTIDISCIPLINARY-
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12.50%
发文量
11
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