Eutectic effect during mesophase formation in co-carbonization of ethylene tar pitch and polystyrene  

作　　者：Cheng Xianglin Song Shulei 

机构地区：[1]Key Laboratory of Coal Processing&Efficient Utilization,Ministry of Education,China University of Mining&Technology,Xuzhou 221116,China [2]High Tech Research Institution of China University of Mining&Technology&The City of Lianyungang Xuwei New Area,Xuzhou 221116,China

出　　处：《International Journal of Mining Science and Technology》2012年第2期183-186,共4页矿业科学技术学报（英文版）

基　　金：the financial support by the Fundamental Research Funds for the Central Universities (No.2010QNA14)

摘　　要：Ethylene tar pitch was co-carbonized with waste polystyrene to prepare mesophase pitch. The character- istics of mesophase pitches were examined using polarized light optical microscopy, apparent viscome- try, Fourier transform infrared spectrometry, IH nuclear magnetic resonance spectrometry, and X-ray diffractometry. The properties of the mesophase pitch were greatly improved because of the eutectic effect. The soluble content increased from 5% to 56%, the mesophase itself increased from 32% to 100%, and the optical texture was changed from a coarse mosaic into a flow domain after the waste polystyrene was added to the ethylene tar pitch. The apparent viscosity showed that the mesophase pitch changed from thixotropic to Newtonian suggesting improved rheological behavior during co-carbonization）The increased number of alkyl groups, which are mainly methylene groups, altered the molecular structure of the mesophase pitch in a way that resulted in the eutectic effect.Ethylene tar pitch was co-carbonized with waste polystyrene to prepare mesophase pitch.The characteristics of mesophase pitches were examined using polarized light optical microscopy,apparent viscometry,Fourier transform infrared spectrometry,1H nuclear magnetic resonance spectrometry,and X-ray diffractometry.The properties of the mesophase pitch were greatly improved because of the eutectic effect.The soluble content increased from 5% to 56%,the mesophase itself increased from 32% to 100%,and the optical texture was changed from a coarse mosaic into a flow domain after the waste polystyrene was added to the ethylene tar pitch.The apparent viscosity showed that the mesophase pitch changed from thixotropic to Newtonian suggesting improved rheological behavior during co-carbonization.The increased number of alkyl groups,which are mainly methylene groups,altered the molecular structure of the mesophase pitch in a way that resulted in the eutectic effect.

关 键 词：Eutectic effectEthylene tar pitchWaste polystyreneCo-carbonizationMesophase pitch 

分 类 号：O657.33[理学—分析化学] X783.05[理学—化学]