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Flame retardant and durable chloroprene rubber and styrene-butadiene rubber blends crosslinked with copper(I) oxide
Iranian Polymer Journal ( IF 2.4 ) Pub Date : 2020-10-31 , DOI: 10.1007/s13726-020-00881-x
Piotr Kobędza , Aleksandra Smejda-Krzewicka , Anna Olejnik , Krzysztof Strzelec

The purpose of this work was to investigate the effect of application of copper(I) oxide (Cu2O) as an unconventional crosslinking agent of chloroprene (CR) and styrene-butadiene (SBR) rubber compositions. The use of Cu2O arises from the need to limit the application of ZnO as a CR crosslinking agent. The obtained results indicate that CR/SBR blends crosslinked with Cu2O are characterized by good mechanical properties and a high degree of crosslinking The results show that the proportion of both processing rubbers, as well as the amount of copper(I) oxide, influence the crosslinking of CR/SBR blends and the properties of the vulcanizates. Performing FTIR analysis has allowed the development of a crosslinking mechanism. Crosslinking presumably takes place according to the mechanism of Friedel–Crafts alkylation reaction. Silica, chalk, china clay and nanofiller (montmorillonite modified with quaternary ammonium salt containing hydroxyl groups) were applied as fillers. Among the fillers, silica had the greatest impact on improving the properties. It is arisen from silica activity, unlike other used fillers. The AFM analysis allowed us to determine the miscibility of the rubbers and dispersion of fillers. Thermal analysis was performed to determine the changes occurring as a result of material heating. The low intensity of the peaks corresponding to the crosslinking of the CR/SBR blends may indicate a small amount of bonds formed during heating, or possibility is the formation of connections between chains with a low binding energy. The use of chalk, china clay or silica increases the thermal stability of the vulcanizates. Obtained vulcanizates were characterized by increased incombustibility. The study of combustion time in the air showed that the prepared vulcanizates did not support the burning.



中文翻译:

与氧化铜(I)交联的阻燃耐用氯丁橡胶和丁苯橡胶混合物

这项工作的目的是研究使用氧化铜(I)(Cu 2 O)作为氯丁二烯(CR)和苯乙烯-丁二烯(SBR)橡胶组合物的非常规交联剂的效果。使用的Cu 2 ö是由于需要限制ZnO的应用程序作为一个CR交联剂。所得结果表明CR / SBR共混物与Cu 2交联O具有良好的机械性能和高交联度的特征。结果表明,两种加工橡胶的比例以及氧化铜(I)的量均会影响CR / SBR共混物的交联和硫化橡胶的性能。进行FTIR分析已经允许开发交联机理。交联大概是根据Friedel-Crafts烷基化反应的机理进行的。二氧化硅,白垩,陶土和纳米填料(用含羟基的季铵盐改性的蒙脱石)用作填料。在填料中,二氧化硅对改善性能的影响最大。它是由二氧化硅活性引起的,与其他用过的填料不同。原子力显微镜的分析使我们能够确定橡胶的混溶性和填料的分散性。进行热分析以确定由于材料加热而发生的变化。与CR / SBR共混物的交联相对应的峰强度低,可能表明在加热过程中形成了少量键,或者可能是链之间形成了具有低结合能的连接。粉笔,瓷土或二氧化硅的使用可提高硫化橡胶的热稳定性。获得的硫化胶的特征在于不燃性增加。对空气中燃烧时间的研究表明,制备的硫化胶不支持燃烧。或可能是在低结合能的链之间形成连接。粉笔,瓷土或二氧化硅的使用可提高硫化橡胶的热稳定性。获得的硫化胶的特征在于不燃性增加。对空气中燃烧时间的研究表明,制备的硫化胶不支持燃烧。或可能是在低结合能的链之间形成连接。粉笔,瓷土或二氧化硅的使用可提高硫化橡胶的热稳定性。获得的硫化胶的特征在于不燃性增加。对空气中燃烧时间的研究表明,制备的硫化胶不支持燃烧。

更新日期:2020-11-02
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