人工气候老化对三元乙丙橡胶性能与结构的影响
Effects of Artificial Weathering on Properties and Structure of Ethylene-Propylene-Diene Monomer(EPDM)
摘 要
利用紫外老化试验箱对三元乙丙橡胶(EPDM)进行人工加速老化试验,采用色度计、光泽度仪、电子万能试验机和傅立叶变换红外光谱仪研究了人工气候老化对EPDM的颜色、光泽度、力学性能和化学结构的影响.结果表明,老化初期EPDM表面颜色随老化时间的延长逐渐变黄变亮,光泽度增加,18天后色差变化很小,光泽度开始下降.老化过程中发生交联反应,拉伸强度随老化时间的延长和交联密度的增加而增大.红外光谱显示有>C=O和C-O-C的生成,说明在紫外人工气候条件下,EPDM的降解产物为羰基化物和醚或酯.
人工气候老化
交联密度
红外光谱
ethylene-propylene-diene monomer(EPDM)
artificial weathering
crosslink density
FR spectroscopy
Abstract
The effects of artificial weathering on the properties and structure of ethylene-propylene-diene monomer(EPDM) were studied through spectrophotometer,gloss meter,microscopy,computer-controlled tensile testing and specular reflectance Fourier transform infra red(SR-FTIR) spectroscopy.The results showed that with increasing the aging time,the surface of EPDM turned to yellow and lighter and the gloss increased in the initial stage of aging,and then the gloss decreased.The tensile strength increased with increase of crosslink density.FTIR spectra implied the formation of carbonyl groups in the artificial weathering environment.
中图分类号 TQ333.4
所属栏目 试验研究
基金项目 国家自然科学基金重点资助项目(No.50533060);国家自然科学基金资助项目(No.50571013);国家科技基础条件平台建设项目(No.2005DKA10400)
收稿日期 2007/10/13
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引用该论文: ZHAO Quan-lin,LI Xiao-gang,GAO Jin. Effects of Artificial Weathering on Properties and Structure of Ethylene-Propylene-Diene Monomer(EPDM)[J]. Corrosion & Protection, 2008, 29(10): 569～572
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参考文献
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【3】Ehsani M,Borsi H,Gockenbach E,et al.An investigation of dynamic mechanical,thermal,and electrical properties of housing materials for outdoor polymeric insulators[J].European Polymer Journal,2004,40(11):2495-2503.
【4】Atkinson S.Combined metallocene and gas-phase technology creates high mooney EPDM[J].Sealing Technology,2003(1):10-12.
【5】Rajeev R S,De S K,Bhowmick A K,et al.Studies on thermal degradation of short melamine fibre reinforced EPDM,Maleated EPDM and Nitrile Rubber Composites[J].Polymer Degradation and Stability,2003,79(3):449-463.
【6】Yue L,Wang W J,Xiao W D.The effect of decabromodiphenyl oxide and antimony trioxide on the flame retardation of ethylene-propylene-diene copolymer/polypropylene blends[J].Polymer Degradation and Stability,2004,86(1):69-73.
【7】Pticek A,Hrnjak M Z,Jelencic J,et al.Study of the effect of structure of ethylene-propylene-diene-graft-polystyrene copolymers on their physical properties[J].Polymer Degradation and Stability,2005,90(2):319-325.
【8】Cheng M,Chen W N.Experimental investigation of the stress-stretch behavior of EPDM rubber with loading rate effects[J].International Journal of Solids and Structures,2003,40(18):4749-4768.
【9】Ghosh P,Chakrabarti A.Effect of incorporation of conducting carbon black as filler on melt rheology and relaxation behaviour of ethylene-propylene-diene monomer(EPDM)[J].European Polymer Journal,2000,36(3):607-617.
【10】Zheng H,Zhang Y,Peng Z L,et al.Influence of clay modification on the structure and mechanical properties of EPDM/montmorillonite nanocomposites[J].Polymer Testing,2004,23(2):217-223.
【11】Gijsman P.New synergists for hindered amine light stabilizers[J].Polymer,2002;43(5):1573-1579.
【12】Snijders E A,Boersma A,Baarle B,et al.Effect of dicumyl peroxide crosslinking on the UV stability of EPDM elastomers containing 5-ethylene-2-norbornene(ENB)[J].Polym Degrad Stab,2005;89(3):484-491.
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