Page 71 - 《橡塑技术与装备》2023年6期

理论与研究 张小萍 等·超声波脱硫新工艺制备轮胎胶粉再生胶及其性能研究

未施加超声波条件下的脱硫程度 ；其原因在于该条件 2020, 36(09):22–25.
[2] 崔小明 . 2019 年我国合成橡胶进口情况分析 [J]. 中国橡胶 ,
下的机筒温度显著高于未施加超声波条件下的温度，
2020, 36(06):26–31.
GTR 的分子热运动加剧，体系黏度下降，导致 GTR [3] 王雪盼 , 卢娜 , 辛振祥 . 再生胶的研究现状及发展前景 [J]. 橡
受到的螺杆剪切作用力减弱，GTR 虽受到一定强度 塑技术与装备 , 2018, 44(13):23–26.
[4] 史金炜，张立群，江宽，等．废橡胶脱硫再生技术及新型再
的超声波脱硫作用，但其显著减弱的螺杆剪切作用对
生剂研究进展 [J]．中国材料进展，2012，31(04):47–54.
GTR 的脱硫影响更大，因而 8 μ ｍ超声波振幅作用下 [5] Isayev A I., Chen J, Tukachinsky A. Novel ultrasonic
的 DGTR 的脱硫程度最低。随超声波振幅进一步增加， technology for devulcanization of waste rubbers[J]. Rubber
脱硫程度显著提升，当超声波振幅为 13 μm 时，脱硫 Chemistry and Technology, 1995, 68(2):267–280.
[6] Tukachinsky A, Schworm D, Isayev A I. Devulcanization
程度最高。
of waste tire rubber by powerful ultrasound[J]. Rubber
（3）当超声波振幅为 8 μm 时，DGTR 硫化胶 Chemistry and Technology, 1996, 69(1):92–103.
的拉伸强度及断裂伸长率最大，分别为 8.26 MPa 及 [7] 张小萍，Isayev A I, 丛后罗 , 等 . 超声波振幅对轮胎胶粉超
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拉伸强度最低，为 4.90 MPa。其原因主要是在 13 μm [8] Isayev A I, Liang T, Lewis M T. Effect of particle size on
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中含有更多的二维线性高分子和可发生硫化交联的活
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参考文献 ：
[1] 崔小明 . 我国天然橡胶进口现状及发展预测 [J]. 中国橡胶 ,

Preparation of tire rubber powder recycled rubber by a new process of
ultrasonic desulfurization and its performance study

Zhang Xiaoping , Wei Bangfeng , Zhang Hangtian , Kou Zhenyang 1
3
1,2
1
(1.Xuzhou College of Industrial Technology, Rubber Recycling Engineering Technology R&D Center of Jiangsu
Province, Xuzhou 221140, Jiangsu, China;
2. Department of Polymer Engineering, The University of Akron, Akron, OH 44325-0301, USA;
3. Xuzhou Armour Rubber Co. LTD., Xuzhou 221011, Jiangsu, China)

Abstract: A co-rotating twin screw extruder with a loaded ultrasonic generator was used for ultrasonic
desulfurization of 40 mesh waste tire rubber powder (GTR). The gel content, rheological properties,
vulcanization properties and mechanical properties of desulfurized GTR (DGTR) vulcanizates without ultrasonic
and with different ultrasonic amplitudes were compared. The results indicate that, the gel content, viscosity
and storage modulus of DGTR obtained under the action of ultrasonic amplitude of 13 um are the lowest,
indicating that the number of crosslinked bonds broken is the largest and the degree of desulfurization is the
highest under this condition. The desulfurization degree of DGTR obtained under the action of 8 um ultrasonic
amplitude is the lowest, but the tensile strength and elongation at break of its vulcanizate are the highest at
the same amount of vulcanizing agent, with 8.26 MPa and 192%, respectively.
Key words: ultrasonic desulfurization; tire rubber powder; gel content; rheological properties; sulfurization
characteristics; mechanical property
(R-03)

2023 第 49 卷 ·23·
年