| 废旧轮胎胶粉应力诱导脱硫反应影响因素的研究 |
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| 引用本文： | 闫标,孟亚男,司虎,张云灿.废旧轮胎胶粉应力诱导脱硫反应影响因素的研究[J].橡胶工业,2011,58(8):460-465. |
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| 作者姓名： | 闫标 孟亚男 司虎 张云灿 |
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| 作者单位： | 南京工业大学 材料科学与工程学院,江苏南京,210009 |
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| 摘 要： | 在废旧轮胎胶粉/EPDM的熔融挤出过程中,以仲丁醇为脱硫反应促进剂,研究螺杆转速和挤出反应温度对脱硫共混物凝胶质量分数(w)、凝胶分子链结构以及SBR/脱硫共混物再硫化材料物理性能的影响。结果表明:在废旧轮胎胶粉/EPDM的熔融挤出过程中,随着螺杆转速和挤出反应温度的升高,废旧轮胎胶粉颗粒所受的机械剪切应力作用增强,引起废旧轮胎胶粉中交联网络的断裂、降解或解交联反应,导致脱硫共混物w显著减小以及SBR/脱硫共混物再硫化材料中凝胶粒子尺寸明显减小;添加仲丁醇有利于脱硫反应的进行,并具有抑制交联副反应和保护脱硫产物中双键的作用,使脱硫共混物的w进一步减小;在螺杆转速为1 000 r.min-1、挤出反应温度为240℃的条件下,SBR/脱硫共混物(添加仲丁醇)再硫化材料的拉伸强度和拉断伸长率分别为19.3 MPa和567%。
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| 关 键 词： | 废旧轮胎胶粉 应力诱导 脱硫 仲丁醇 SBR EPDM |
Study on Factors of Devulcanization of Ground Tire Rubber through Stress-induced Reaction |
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| YAN Biao,MENG Ya-nan,Si Hu and ZHANG Yun-can.Study on Factors of Devulcanization of Ground Tire Rubber through Stress-induced Reaction[J].China Rubber Industry,2011,58(8):460-465. |
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| Authors: | YAN Biao MENG Ya-nan Si Hu and ZHANG Yun-can |
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| Affiliation: | YAN Biao,MENG Ya-nan,Si Hu,ZHANG Yun-can(Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | During melt extrusion of the mixture of ground tire rubber and EPDM,2-butyl alcohol was added as devulcanization accelerator,and the effect of screw rotating speed and reaction temperature on the gel content of devulcanized blends,molecular structure of gel and physical properties of SBR/devulcanized blends was investigated.The results showed that,as the screw rotating speed and reaction temperature increased during extrusion,the mechanical shear stress on ground tire rubber enhanced,which made cross-linkin... |
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| Keywords: | ground tire rubber stress-inducement devulcanization 2-butyl alcohol SBR EPDM |
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