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首页> 外文期刊>Polymers for advanced technologies >Dichlorocarbene modified butadiene rubber ( DCBRDCBR ): Preparation, kinetic study, and its properties in natural rubber/ DCBRDCBR blend vulcanizates
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Dichlorocarbene modified butadiene rubber ( DCBRDCBR ): Preparation, kinetic study, and its properties in natural rubber/ DCBRDCBR blend vulcanizates

机译：二氯甲烷改性丁二烯橡胶（ dcbr dcbr）：自然橡胶/ dcbr

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>Dichlorocarbene modified butadiene rubber (DCBR) was prepared via the addition of the dichlorocarbene group in the presence of 2 phase transfer agents (cetyltrimethylammonium bromide and tetraethylammonium chloride). The effects of the reaction temperature and time, amount of dichlorocarbene precursor, and the type and amount of phase transfer agent on the chlorine content were investigated. The highest chlorine content (30%) in DCBR was obtained using 0.062?mol chloroform and 0.003?mol cetyltrimethylammonium bromide at room temperature for 19?hours although 27.9% was obtained after 12?hours. The kinetics of this dichlorocarbene modification was best described by the pseudo–first order rate law with 2 rate constants. For practical applications, the DCBR with chlorine contents of 10%, 20%, or 30% were blended with natural rubber (NR) and then vulcanized using the sulfur‐curing system. Although the polarity of DCBR was increased, a good compatibility between NR and DCBR still existed, resulting in improved mechanical properties. The oil resistance, flame retardant, and ozone resistance properties of the NR/DCBR blend vulcanizates were enhanced compared to those of a NR/butadiene rubber blend vulcanizate, which was related to the amount of chlorine incorporated into the DCBR.
机译： >通过加入二氯甲烷制备二氯甲烷改性的丁二烯橡胶（DCBR）在存在2相转移剂的存在（十六烷基三甲基溴化铵和四乙基氯化铵）的存在下。研究了反应温度和时间，二氯甲烷前体的效果，以及相转移剂对氯含量的类型和量。使用0.062摩尔氯仿获得DCBR中最高氯含量（30％），在室温下在室温下获得0.003·摩尔甲基三甲基溴化铵，但在12.9％后获得27.9％。该二氯甲烷改性的动力学是由伪第一订单率法的最佳描述，具有2个速率常数。对于实际应用，氯含量为10％，20％或30％的DCBR与天然橡胶（NR）混合，然后使用硫固化系统硫化。尽管DCBR的极性增加，但是NR和DCBR之间的良好相容性仍然存在，因此导致改善的机械性能。与NR /丁二烯橡胶共混物硫化胶相比，增强了NR / DCBR混合物硫化橡胶的耐油性，阻燃和臭氧性，其与掺入DCBR中的氯的量有关。 < /摘要>

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