Sukhareva Ksenia Valeriyevna, Sukharev Nikita Romanovich, Levina Irina Ivanovna, Offor Peter Ogbuna, Popov Anatoly Anatolyevich
Higher School of Engineering, Plekhanov Russian University of Economics, 36 Stremyanny Ln, 117997 Moscow, Russia.
Institute of Biochemical Physics Named after N.M. Emanuel, Russian Academy of Sciences, 4 Kosygin St., 119991 Moscow, Russia.
Polymers (Basel). 2023 Oct 18;15(20):4137. doi: 10.3390/polym15204137.
Traditional butyl rubber halogenation technology involves the halogenation of IIR using molecular chlorine or bromine in a solution. However, this method is technologically complex. This study investigated a novel method for the halogenation of butyl rubber to enhance its stability and resistance to thermal oxidation and aggressive media. The butyl rubber was modified through mechanochemical modification, induced by solvent swelling in a polychlorinated n-alkane solution. During the modification, samples were obtained with chlorine content ranging from 3 to 15%. After extraction, the halogen content was quantitatively determined with the oxygen flask combustion method and X-ray photoelectron spectroscopy. It was shown that for samples with total chlorine content of up to 6%, there was almost no leaching of chlorine from the samples. The chemical structure of the extracted rubbers was ascertained using FT-IR and H NMR spectroscopy, and it was demonstrated that all samples showed absorption peaks and signals typical for chlorobutyl rubbers. It was observed that modification with polychlorinated n-alkanes improved the thermal and oxidative stability (the oxygen absorption rate decreased by 40%) and chemical resistance, estimated by the degree of swelling, which decreased with the increase in the chlorine content. This technology allows the production of a chlorinated rubber solution that can be directly used by rubber goods manufacturers and suppliers.
传统的丁基橡胶卤化技术涉及在溶液中使用分子氯或溴对异丁烯-异戊二烯橡胶（IIR）进行卤化。然而，这种方法工艺复杂。本研究探索了一种卤化丁基橡胶的新方法，以提高其稳定性以及对热氧化和侵蚀性介质的耐受性。丁基橡胶通过在多氯代正构烷烃溶液中溶剂溶胀引发的机械化学改性进行改性。在改性过程中，获得了氯含量范围为3%至15%的样品。萃取后，采用氧瓶燃烧法和X射线光电子能谱法定量测定卤素含量。结果表明，对于总氯含量高达6%的样品，几乎没有氯从样品中浸出。使用傅里叶变换红外光谱（FT-IR）和核磁共振氢谱（H NMR）确定萃取橡胶的化学结构，结果表明所有样品均显示出氯丁橡胶典型的吸收峰和信号。观察到用多氯代正构烷烃改性提高了热稳定性和氧化稳定性（吸氧率降低了40%）以及耐化学性，通过溶胀度评估，溶胀度随氯含量的增加而降低。该技术能够生产出可直接供橡胶制品制造商和供应商使用的氯化橡胶溶液。
