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首页> 外文期刊>Journal of Applied Polymer Science >Balancing mechanical properties and processability for devulcanized ground tire rubber using industrially sized single-screw extruder
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Balancing mechanical properties and processability for devulcanized ground tire rubber using industrially sized single-screw extruder

机译：使用工业尺寸的单螺杆挤出机平衡脱硫地面轮胎橡胶的机械性能和可加工性

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Devulcanized ground tire rubber (DGTR) samples were produced using an independently developed industrially sized single-screw extruder. The DGTR was further revulcanized to produce revulcanized DGTR (RDGTR) samples. The structure and properties of the produced samples were investigated via tests and characterization of sol fraction, crosslink density, Fourier transform infrared spectroscopy spectra, X-ray photoelectron spectroscopy spectra, Mooney viscosity, curing characteristics, dynamic rheology, tensile properties, and surface morphology. The results demonstrate that the extruder can effectively break up crosslinked structure of ground tire rubber to achieve high devulcanization level (characterized by sol fraction and crosslink density), which is mainly associated with its moderate shear strength. The balance between mechanical properties and processability for the DGTR samples was analyzed. Lower ratios of main-chain to crosslink scission and good processability (mainly characterized by modest Mooney viscosity) for the DGTR samples, and high tensile strengths and elongations at break for the RDGTR samples are obtained via appropriately combining the barrel temperature and screw speed. High quality DGTR sample with tensile strength and elongations at break of up to 11 MPa and 370%, respectively, is prepared under the conditions used in this work. (C) 2016 Wiley Periodicals, Inc.
机译：脱硫的地面轮胎橡胶（DGTR）样品是使用独立开发的工业规模的单螺杆挤出机生产的。将DGTR进一步硫化，以生产硫化DGTR（RDGTR）样品。通过测试和表征溶胶分数，交联密度，傅立叶变换红外光谱，X射线光电子能谱，门尼粘度，固化特性，动态流变，拉伸性能和表面形态来测试所制备样品的结构和性能。结果表明，该挤出机可以有效地粉碎地面轮胎橡胶的交联结构，以达到较高的脱硫水平（以溶胶分数和交联密度为特征），这主要与其适度的剪切强度有关。分析了DGTR样品的机械性能和可加工性之间的平衡。通过适当组合料筒温度和螺杆转速，可以获得较低的主链与交联键断裂比率，以及DGTR样品的良好加工性能（主要表现为中等的门尼粘度），以及RDGTR样品的高拉伸强度和断裂伸长率。在这项工作中使用的条件下，制备的高质量DGTR样品的拉伸强度和断裂伸长率分别高达11 MPa和370％。 （C）2016威利期刊公司

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