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首页> 外文期刊>Journal of Applied Polymer Science >Devulcanization of carbon black filled natural rubber using supercritical carbon dioxide
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Devulcanization of carbon black filled natural rubber using supercritical carbon dioxide

机译：使用超临界二氧化碳对炭黑填充天然橡胶进行脱硫

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摘要

Natural rubber (NR) vulcanizates filled with various contents of carbon black were devulcanized in supercritical CO, in the presence of diphenyl disulfide as a devulcanizing reagent. The devulcanized rubbers were separated to sol and gel components using chloroform. Regardless of the carbon black content in the NR vulcanizates, sol fractions of 20-40% were obtained and the swelling ratios of the gel components were higher than the original vulcanizates. Dynamic mechanical properties of the devulcanized rubbers were also investigated. Devulcanized rubbers showed a slightly lower G' values and slightly higher tan 6 values than the initial compounds and much lower G' values and much higher tan 8 values than the vulcanizates. These results indicate that the presence of carbon black in NR vulcanizates does not disturb the devulcanization. A NR-based truck tire vulcanizate was also devulcanized. The physical properties of recycled rubber made from virgin rubber and various contents of the devulcanized tire rubber were measured. The decrease in tensile strength was only around 10% at up to 40 phr of the devulcanized tire rubber content. (C) 2004 Wiley Periodicals, Inc.
机译：在二苯二硫作为脱硫剂的情况下，将填充了各种含量炭黑的天然橡胶（NR）硫化胶在超临界CO中脱硫。用氯仿将脱硫的橡胶分离成溶胶和凝胶组分。无论NR硫化橡胶中的炭黑含量如何，均可获得20-40％的溶胶分数，并且凝胶组分的溶胀率高于原始硫化橡胶。还研究了脱硫橡胶的动态力学性能。脱硫橡胶的G'值和tan 6值比初始化合物略低，G'值和tan 8值比硫化胶低得多。这些结果表明NR硫化物中炭黑的存在不会干扰脱硫。 NR型卡车轮胎硫化胶也已脱硫。测量了由原始橡胶制成的再生橡胶的物理性能以及脱硫轮胎橡胶的各种含量。在高达40 phr的脱硫轮胎橡胶含量下，抗张强度的降低仅约为10％。 （C）2004年Wiley Periodicals，Inc.

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