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	合成橡胶工业 CHINA SYNTHETIC RUBBER INDUSTRY 2009 Vol.32 No.4 P.325-329

羧基丁腈橡胶基阻尼复合材料的相态结构及动态力学性能

刘其霞　丁新波　张慧萍　晏雄　

摘　要：研究了羧基丁腈橡胶(XNBR)/受阻酚2,2′-亚甲基双-(4-甲基-6-叔丁基苯酚) (AO-2246)复合材料的相态结构及动态力学性能,并考察了短碳纤维(SCF)的加入对复合材料动态力学性能的影响.结果表明,XNBR/AO-2246复合材料中AO-2246的质量分数存在1个临界值(40%),当AO-2246质量分数小于该临界值时,体系呈现单相形态;当AO-2246质量分数大于该临界值时,体系呈现多相形态;XNBR/AO-2246复合材料只有1个玻璃化转变峰,随着AO-2246质量分数的增加,损耗因子峰值(tan δmax)先增大后减小,玻璃化转变温度(Tg)向高温方向移动至室温;当AO-2246质量分数为50%时,tan δmax高达3.5;加入SCF后,XNBR/AO-2246复合材料的tan δmax值大幅度下降至2.5左右,但当SCF质量分数为30%时,tan δmax值升高至2.8;SCF的加入使XNBR/AO-2246复合材料的Tg略有升高,且SCF用量越大,Tg越高,同时XNBR/AO-2246复合材料的储能模量大幅度增加.
关键词：羧基丁腈橡胶;受阻酚;短碳纤维;阻尼材料;相态结构;动态力学性能
分类号：TQ333.7 　文献标识码：B
文章编号：1000-1255(2009)04-0325-05

Microphase structure and dynamic mechanical properties of carboxylated nitrile rubber-based damping composites

Liu Qixia（Key Laboratory of Textile Science and Technology,Ministry of Education,Donghua University,Shanghai 200051,China）　 Ding Xinbo（Key Laboratory of Textile Science and Technology,Ministry of Education,Donghua University,Shanghai 200051,China）　 Zhang Huiping（Key Laboratory of Textile Science and Technology,Ministry of Education,Donghua University,Shanghai 200051,China）　 Yan Xiong（Key Laboratory of Textile Science and Technology,Ministry of Education,Donghua University,Shanghai 200051,China）　

Abstract：The microphase structure and dynamic mechanical properties of carboxylated nitrile rubber(XNBR)/hindered phenol 2,2′-methylene bis(6-tert-butyl-4-methylphenol) (AO-2246) composites were studied and effect of adding short carbon fiber (SCF) on dynamic mechanical properties of composites was also investigated. The results showed that there existed a critical of mass fraction AO-2246 of 40% in the XNBR/AO-2246 composite. When the mass fraction of AO-2246 was below this critical value, the system demonstrated a single-phase morphology. However, when the mass fraction of AO-2246 was over this critical value, the system demonstrated a multiphase morphology. The XNBR/AO-2246 composite showed a single glass transition peak. With increasing AO-2246, the maximum value of loss tangent (tan δmax) firstly increased and then decreased, while the glass transition temperature (Tg) continuously shifted towards higher temperature to room temperature. When mass fraction of AO-2246 reached 50%, the tan δmax increased up to 3.5. By addition of SCF, the tan δmax of XNBR/AO-2246 composite decreased sharply to 2.5. However, when mass fraction of SCF increased up to 30%, the tan δmax increased to 2.8. BesIDes, the Tg of XNBR/AO-2246 composite was slightly raised by the addition of SCF and the Tg became higher when more SCF was added. At the same time, the storage modulus of XNBR/AO-2246 composite was remarkably increased.
Keywords：carboxylated nitrile rubber; hindered phenol; short carbon fiber; damping composite; microphase structure; dynamic mechanical property

作者简介：刘其霞(1983-),女,博士研究生.已发表论文6篇.
作者单位：刘其霞（东华大学,教育部纺织面料重点实验室,上海,200051）　
　　　　　丁新波（东华大学,教育部纺织面料重点实验室,上海,200051）　
　　　　　张慧萍（东华大学,教育部纺织面料重点实验室,上海,200051）　
　　　　　晏雄（东华大学,教育部纺织面料重点实验室,上海,200051）　

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收稿日期：2008年7月1日

修稿日期：2009年6月8日

出版日期：2009年7月15日

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