干摩擦条件下氧化锌对丁腈橡胶摩擦磨损行为的影响
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摘要
运用环-块摩擦磨损试验机研究了不同类型氧化锌对丁腈橡胶干摩擦磨损性能的影响。将不同类型氧化锌加入丁腈橡胶,对试样进行常规制备,磨损后橡胶表面分子结构利用红外光谱仪进行分析。结果表明,与添加普通氧化锌、纳米氧化锌和改性普通氧化锌的胶料相比,添加改性纳米氧化锌胶料表现出了优异的耐摩擦磨损性能。其磨损量为0.021g,仅为添加普通氧化锌胶料磨损量的1/4;摩擦系数为0.4,是添加4种氧化锌胶料中最低的;且胶料仅发生了磨粒磨损,未出现其他更为严重的磨损形式。文章对于添加不同类型氧化锌胶料摩擦磨损性能出现差异的原因进行了分析。分析结果表明,摩擦生热导致的硫化返原是造成胶料磨损程度不同的根本原因。即摩擦生热引起多硫键断裂及主链改性,造成胶料交联密度的下降,降低了胶料的耐摩擦磨损性能。
The friction and wear behavior of nitrile-butadiene rubber( NBR) filled with different kinds of zinc oxide( ZnO) were studied through ring-on-block tester under dry sliding. Based on samples preparation,the molecular structure of worn surface was measured by FT-IR. The results show that,compared with NBR containing conventional ZnO( c-ZnO),nano-ZnO( n-ZnO),and modified c-ZnO,NBR containing modified n-ZnO exhibits more outstanding wear resistance. Its wear loss is 0. 021 g,which is a quarter of wear loss of NBR containing c-ZnO. The frictional coefficient of NBR containing modified n-ZnO is the lowest( about 0. 4). There is no else worn form except for abrasive wear about NBR containing modified n-ZnO. The reason for the variation of friction and wear behavior of NBR containing different kinds of ZnO was discussed. The analysis results indicate that cure reversion induced by the generation of heat by friction is the root cause of the difference about friction and wear behavior. Namely,the decrease of crosslinking density results from breakage of multi sulfur bond and main chain modification caused by frictional heat,which results in reduction of the wear resistance.
The friction and wear behavior of nitrile-butadiene rubber( NBR) filled with different kinds of zinc oxide( ZnO) were studied through ring-on-block tester under dry sliding. Based on samples preparation,the molecular structure of worn surface was measured by FT-IR. The results show that,compared with NBR containing conventional ZnO( c-ZnO),nano-ZnO( n-ZnO),and modified c-ZnO,NBR containing modified n-ZnO exhibits more outstanding wear resistance. Its wear loss is 0. 021 g,which is a quarter of wear loss of NBR containing c-ZnO. The frictional coefficient of NBR containing modified n-ZnO is the lowest( about 0. 4). There is no else worn form except for abrasive wear about NBR containing modified n-ZnO. The reason for the variation of friction and wear behavior of NBR containing different kinds of ZnO was discussed. The analysis results indicate that cure reversion induced by the generation of heat by friction is the root cause of the difference about friction and wear behavior. Namely,the decrease of crosslinking density results from breakage of multi sulfur bond and main chain modification caused by frictional heat,which results in reduction of the wear resistance.
引文
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[2]Delpassand M.Progressing cavity pump design optimization for abrasive applications[J].J.Pet.Technol.,1997(7):731-732.
[3]Zhang S W.State-of-the-art of polymer tribology[J].Trib.Int.,1998,31:49-60.
[4]Voort J V,Bahadur S.The growth and bonding of transfer film and the role of Cu S and PTFE in the tribological behavior of PEEK[J].Wear,1995,183:212-221.
[5]张爱波,徐金鹏,郑亚萍.纳米氧化锌在NBR中的应用研究[J].橡胶工业,2003,50(8):477-478.Zhang A B,Xu J P,Zheng Y P.The application research of nanoZn O in NBR[J].China Rubber Industry,2003,50(8):477-478.
[6]杨清芝.现代橡胶工艺学[M].北京:中国石化出版社,1997.
[7]孙霞容,栗付平,蒋洪罡,等.不同氧化锌对天然橡胶疲劳性能影响的研究[J].弹性体,2007,17(6):46-49.Sun X R,Li F P,Jiang H G,et al.Effect of different zinc oxides on the properties of NR[J].China Elastomerics,2007,17(6):46-49.
[8]Stamhnis J E,Groenewoud W M,Madsen J.Two types of SSBRblends for tire tread application[J].Plast.Rubber Process.Appl.,1989,11:93-98.
[9]Huneau B,Verron E.Mechanism of fatigue crack growth in carbon black filled natural rubber[J].Macromolecules,2004,37:5011-5017.
[10]Baeka D K.Fretting behavior of a rubber coating effect of temperature and surface roughness variations[J].Wear,2008,265:620-625.
[11]黄琛,范汝良,张隐西.硫化返原对NR硫化胶结构与性能的影响[J].橡胶工业,2001,48(2):69-74.Huang C,Fan R L,Zhang Y X.Effect of reversion on structure and properties of NR vulcanizates[J].China Rubber Industry,2001,48(2):69-74.
[12]张安强,林雅铃,罗晓琪,等.硫化胶中游离氧化锌含量的测定[J].橡胶工业,2010,57(4):247-250.Zhang A Q,Lin Y L,Luo X Q,et al.The determination of content on free zinc oxide in vulcanized rubber[J].China Rubber Industry,2010,57(4):247-250.