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题名: Low temperature heat capacities and thermal analysis of N-(p-methylphenyl)-N '-(2-pyridyl)urea
作者: Lu, QY;  Song, YJ;  Meng, SH;  Xing, J;  Tan, ZC
关键词: N-(p-methylphenyl)-N '-(2-pyridyl)urea ;  adiabatic calorimetry ;  thermodynamic function ;  thermal analysis
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2002-02-01
DOI: 10.3866/PKU.WHXB20020215
卷: 18, 期:2, 页:166-169
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Heat capacities of N-(p-methylphenyl)-N'-(2-pyridyl) urea were determined by low temperature adiabatic calorimetry in the temperature range of 80 to 370 K. It is found that there is no heat anomaly in this temperature region. With the experimental heat capacities thermodynamic functions were calculated. To investigate the thermal stability and decomposition characteristics of N-(p-methylphenyl)-N'-(2-pyridyl) urea, DSC and TG experiments were carried out. The results indicated that N-(p-methylphenyl)-N'-(2-pyridyl)urea started to melt at 153 degreesC and the melting peak located at 173.86 degreesC. The melting enthalpy is 204.45 kJ (.) mol(-1). The decomposition peak of N-(p-methylphenyl)-N'-(2-pyridyl)urea was found at 226.11 degreesC from DSC curve. This result is similar with that from TG and DTG experiment, in which the weight loss peak was determined as 227.2 degreesC.
关键词[WOS]: CALORIMETER
语种: 英语
WOS记录号: WOS:000173613600015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139149
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Beijing Inst Petrochem Technol, Dept Chem Engn, Beijing 102600, Peoples R China
3.China Natl Petr Corp, Lubricat Co, Dalian Technol Ctr, Dalian 116031, Peoples R China

Recommended Citation:
Lu, QY,Song, YJ,Meng, SH,et al. Low temperature heat capacities and thermal analysis of N-(p-methylphenyl)-N '-(2-pyridyl)urea[J]. ACTA PHYSICO-CHIMICA SINICA,2002,18(2):166-169.
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