A novel thiourea based interfacial modifier for silica-filled natural rubber composites,Journal of Applied Polymer Science

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A novel thiourea based interfacial modifier for silica-filled natural rubber composites
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2022-12-24 , DOI: 10.1002/app.53550
Heba Kandil ₁ , Heba M. Abo‐Salem ₂

Affiliation

In this paper, a novel interfacial modifier, namely 2-hexylthiouronium bromide (HTB), for silica has been synthesized and applied into silica-filled natural rubber (NR) composites. HTB was synthesized from the reaction of thiourea with hexyl bromide at 65°C. Fourier-transform infrared (FTIR) and Proton nuclear magnetic resonance spectrometry (¹HNMR) were used to characterize the chemical structure of HTB. Different loadings of HTB were used to prepare a series of silica-filled NR composites with the aim of verifying the optimal loading of HTB. The cure characteristics, swelling, mechanical, aging and morphological properties of the resulting composites were studied and compared with the unmodified silica-filled NR composite. The thermal stability of the composites were also studied by thermogravimetric analysis. By examining the properties of the composites, it was found that the addition of HTB had a significant effect on the properties of the silica-filled NR composites, resulting in shorter scorch and cure times, as well as better swelling, mechanical, aging, and thermal properties than those of the unmodified composite. Furthermore, it was found that 2.5 phr loading of HTB was preferable to obtain a composite with superior tensile properties as its composite's tensile strength increased by 104% over the unmodified composite.

中文翻译：

用于二氧化硅填充天然橡胶复合材料的新型硫脲基界面改性剂

在本文中，合成了一种用于二氧化硅的新型界面改性剂，即 2-己基硫脲溴化物 (HTB)，并将其应用于二氧化硅填充的天然橡胶 (NR) 复合材料中。HTB 由硫脲与己基溴在 65°C 下反应合成。傅立叶变换红外 (FTIR) 和质子核磁共振光谱法 ( ¹HNMR）用于表征HTB的化学结构。使用不同的 HTB 负载量制备一系列二氧化硅填充的 NR 复合材料，目的是验证 HTB 的最佳负载量。研究了所得复合材料的固化特性、溶胀、机械、老化和形态性能，并与未改性的二氧化硅填充 NR 复合材料进行了比较。还通过热重分析研究了复合材料的热稳定性。通过检查复合材料的性能，发现添加 HTB 对二氧化硅填充的 NR 复合材料的性能有显着影响，导致更短的焦烧和固化时间，以及更好的溶胀、机械、老化和热性能优于未改性复合材料。此外，还发现 2。

更新日期：2022-12-24

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