Thermodynamic investigation on para-alkyl chain-substituted phenylbicyclohexyl-type liquid crystals with difluorooxymethylene bridge
文献类型：期刊论文
| 作者 | Du, Jie1,2; Wang, Xuelin2; Tan, Zhicheng3; Zou, Guanglong2 |
| 刊名 | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 128期号:1页码:271-277 |
| 关键词 | Heat Capacity Liquid Crystal Thermodynamic Functions Physical Properties Measurement System (Ppms) Phase Transition N-ccxb(f f)-f |
| ISSN号 | 1388-6150 |
| DOI | 10.1007/s10973-016-5852-5 |
| 文献子类 | Article |
| 英文摘要 | We report the results of the study of thermodynamic properties for two difluorooxymethylene-bridged fluorinated liquid crystals. Isobaric heat capacities of the compounds were measured using a Quantum Design Physical Properties Measurement System with heat capacity measurement in the range of 1.9-300 K. Heat capacities of two compounds increased with the temperature increment, and no any thermal anomalies were observed in the whole temperature region, and also the heat capacity values of 5-CCXB(F,F)-F are larger than that of 3-CCXB(F,F)-F due to molecular weight difference even though they are homologs. Standard thermodynamic properties of the liquid crystals were evaluated from the experimental heat capacity temperature dependencies. From the heat capacity results, the standard molar entropies and enthalpies at 298.15 K were determined to be (657.32 +/- 6.57), (741.81 +/- 7.42) J K-1 mol(-1) and (97.17 +/- 0.97), (108.89 +/- 1.09) kJ K-1 mol(-1) for n-CCXB(F,F)-F (n = 3, 5), respectively. Finally, the phase transition sequences and thermodynamical stability of these two fluorinated liquid crystals were performed by differential scanning calorimetry measurements in the temperature range of 253-373 K. |
| WOS关键词 | TEMPERATURE HEAT-CAPACITY ; ENTROPY |
| WOS研究方向 | Thermodynamics ; Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000396056500026 |
| 出版者 | SPRINGER |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169290]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Zou, Guanglong |
| 作者单位 | 1.Guiyang Univ, Coll Chem & Mat Engn, Guiyang 550005, Peoples R China 2.Guizhou Minzu Univ, Sch Chem & Environm Sci, Guiyang 550025, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Jie,Wang, Xuelin,Tan, Zhicheng,et al. Thermodynamic investigation on para-alkyl chain-substituted phenylbicyclohexyl-type liquid crystals with difluorooxymethylene bridge[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2017,128(1):271-277. |
| APA | Du, Jie,Wang, Xuelin,Tan, Zhicheng,&Zou, Guanglong.(2017).Thermodynamic investigation on para-alkyl chain-substituted phenylbicyclohexyl-type liquid crystals with difluorooxymethylene bridge.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,128(1),271-277. |
| MLA | Du, Jie,et al."Thermodynamic investigation on para-alkyl chain-substituted phenylbicyclohexyl-type liquid crystals with difluorooxymethylene bridge".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 128.1(2017):271-277. |
入库方式： OAI收割
来源：大连化学物理研究所
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