力化学再生胶的制备及其结构和形貌
Preparation of Mechanochemical Reclaimed Rubber and Its Structure and Morphology
摘 要
以废旧橡胶粉为原料,制备了力化学再生胶,通过研究活化再生温度、时间以及剪切温度对再生胶中凝胶含量的影响,得到了最佳的再生工艺条件,并对废旧橡胶粉和再生胶的重均相对分子质量、氧硫元素含量、表观形貌及热分析曲线进行了分析.结果表明:最佳的力化学再生工艺条件为温度220 ℃、时间2.5 h、剪切温度70 ℃;力化学法主要破坏硫交联键,能在较大程度上保持橡胶主链的完整;与废胶粉相比,力化学再生胶表面氧元素的质量分数由23.62%增至26.89%,硫元素的质量分数由1.37%降至1.07%;力化学再生胶的表面形貌极不规整,且呈相互粘结的塑性状态,其热稳定性弱于废胶粉的.
再生工艺参数
废旧橡胶粉
mechanochemical method
regeneration process parameter
waste rubber powder
Abstract
Mechanochemical reclaimed rubber was prepared by taking waste rubber as raw material.The best regeneration process conditions were obtained by studying the effects of activation regeneration temperature,time and shearing temperature on gel content in reclaimed rubber,and weight average molecular mass,the contents of sulfur and oxygen elements,surface morphhology and thermal analysis curves of waste rubber and reclaimed rubbers were analyzed.The results show that the best process condition were as follows:activation regeneration temperature of 220 ℃,time of 2.5 h and shearing temperature of 70 ℃.Sulfur bonds were mainly broken by mechanochemical method and the main chains of rubber could be left intact well.The mass fraction of oxygen on mechanochemical reclaimed rubber surface could be increased from 23.62% to 26.89% after regeneration,and the mass fraction of sulfur could be decreased from 1.37% to 1.07%.The morphology of the mechanochemical reclaimed rubber was proved impressively plastic and viscous,which meant less thermal stability than the waste rubber powder.
中图分类号 TQ335 DOI 10.11973/jxgccl201507011
所属栏目 新材料 新工艺
基金项目 国家自然科学基金资助项目(51273060)
收稿日期 2015/1/20
修改稿日期 2015/3/23
网络出版日期
作者单位点击查看
备注杨罡(1989-),男,湖北咸宁人,硕士研究生.
引用该论文: YANG Gang,PENG Shao-xian,GAO Ruo-feng,ZHAO Xi-po. Preparation of Mechanochemical Reclaimed Rubber and Its Structure and Morphology[J]. Materials for mechancial engineering, 2015, 39(7): 53～57
杨罡,彭少贤,高若峰,赵西坡. 力化学再生胶的制备及其结构和形貌[J]. 机械工程材料, 2015, 39(7): 53～57
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【3】MASSEY J L,PARR J C,WAGLER T A,et al.Ultrasound devulcanization of unfilled natural rubber networks,studied via component molecular mobility[J].Polymer International,2007,56(7):860-869.
【4】杨罡,赵西坡,吴涛,等.再生橡胶性能测试与表征方法[J].弹性体,2014,24(3):65-70.
【5】TAO G L,HE Q H,XIA Y P,et al.The effect of devulcanization level on mechanical properties of reclaimed rubber by thermal-mechanical shearing devulcanization[J].Journal of Applied Polymer Science,2013,129(5):2598-2605.
【6】HASSAN M M,ALY R O,ABDEL A S E,et al.Mechanochemical devulcanization and gamma irradiation of devulcanized waste rubber/high density polyethylene thermoplastic elastomer[J].Journal of Industrial and Engineering Chemistry,2013,19(5):1722-1729.
【7】张新星,卢灿辉,梁梅.废旧轮胎橡胶的常温应力诱导固相力化学脱硫化研究[J].高分子材料科学与工程,2006,22(6):118-121.
【8】ZHANG X X,LU C H,LIANG M.Properties of natural rubber vulcanizates containing mechanochemically devulcanized ground tire rubber[J].Journal of Polymer Research,2009,16(4):411-419.
【9】BALASUBRAMANIAN M.Cure modeling and mechanical properties of counter rotating twin screw extruder devulcanized ground rubber tire-natural rubber blends[J].Journal of Polymer Research,2009,16(2):133-141.
【10】JIANG G M,ZHAO S H,LUO J Y,et al.Microbial desulfurization for NR ground rubber by thiobacillus ferrooxidans[J].Journal of Applied Polymer Science,2010,116(5):2768-2774.
【11】JEONG S O,ISAYEV A I.Continuous ultrasonic devulcanization of unfilled butadiene rubber[J].Journal of Applied Polymer Science,2004,93(3):1166-1173.
【12】LU Z X,ZHANG X X,TIAN D,et al.Mechanochemical preparation of devulcanized ground fluoroelastomers for the enhancement of the thermal stability of nitrile-butadiene rubber vulcanizates[J].Journal of Applied Polymer Science,2012,126(4):1351-1358.
【13】JIANG K,SHI J W,GE Y Y,et al.Complete devulcanization of sulfur-cured butyl rubber by using supercritical carbon dioxide[J].Journal of Applied Polymer Science,2013,127(4):2397-2406.
【14】JANA G K,DAS C K.Recycling natural rubber vulcanizates through mechanochemical devulcanization[J].Macromolecular Research,2005,13(1):30-38.
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