Wiśniewska Paulina, Zedler Łukasz, Formela Krzysztof
Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
Polymers (Basel). 2021 Nov 20;13(22):4014. doi: 10.3390/polym13224014.
In this paper, ground tire rubber was modified with dicumyl peroxide and a variable content (in the range of 0-15 phr) of ethylene-vinyl acetate copolymers characterized by different vinyl acetate contents (in the range of 18-39 wt.%). Modification of ground tire rubber was performed via an auto-thermal extrusion process in which heat was generated during internal shearing of the material inside the extruder barrel. The processing, performance properties, and storage stability of modified reclaimed ground tire rubber were evaluated based on specific mechanical energy, infrared camera images, an oscillating disc rheometer, tensile tests, equilibrium swelling, gas chromatography combined with a flame ionization detector, and gas chromatography with mass spectrometry. It was found that the developed formulas of modified GTR allowed the preparation of materials characterized by tensile strengths in the range of 2.6-9.3 MPa and elongation at break in the range of 78-225%. Moreover, the prepared materials showed good storage stability for at least three months and satisfied processability with commercial rubbers (natural rubber, styrene-butadiene rubber).
在本文中，用过氧化二异丙苯和不同醋酸乙烯酯含量（18 - 39 wt.%）的乙烯 - 醋酸乙烯酯共聚物的可变含量（0 - 15 phr范围内）对磨碎轮胎橡胶进行改性。磨碎轮胎橡胶的改性通过自热挤出工艺进行，在该工艺中，物料在挤出机机筒内部的内剪切过程中产生热量。基于比机械能、红外热像仪图像、振荡盘流变仪、拉伸试验、平衡溶胀、气相色谱 - 火焰离子化检测器联用以及气相色谱 - 质谱联用，对改性再生磨碎轮胎橡胶的加工性能、性能特性和储存稳定性进行了评估。结果发现，所开发的改性磨碎轮胎橡胶配方能够制备出拉伸强度在2.6 - 9.3 MPa范围内且断裂伸长率在78 - 225%范围内的材料。此外，所制备的材料显示出至少三个月的良好储存稳定性，并且与商用橡胶（天然橡胶、丁苯橡胶）具有良好的加工性能。
