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Synthesis of Poly (D,L-lactic Acid-co-glycolic Acid-co-ε-caprolactone) Terpolyesters by Direct Polycondensation 直接缩聚法合成聚(D, l -乳酸-共乙醇酸-共ε-己内酯)三聚聚酯
Current Research in Chemistry Pub Date : 2010-01-01 DOI: 10.3923/CRC.2010.10.17
Y. Baimark, M. Srisa-ard, A. Puntumchai
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引用次数: 6
SYNTHESIS AND CHARACTERIZATION OF A BIMETALLIC OXALATE BASED MAGNET: [(C4H9)4P][M(II)Cr(ox)3] M(II) =Mn, Fe, Co, Ni, Cu [(C4H9)4P][M(II)Cr(ox)3] M(II) =Mn, Fe, Co, Ni, Cu双金属草酸盐基磁体的合成与表征
Current Research in Chemistry Pub Date : 2009-01-07 DOI: 10.3923/CRC.2009.1.7
F. Martak, D. Onggo, Ismunandar, A. Nugroho, N. Mufti, B. Yamin
{"title":"SYNTHESIS AND CHARACTERIZATION OF A BIMETALLIC OXALATE BASED MAGNET: [(C4H9)4P][M(II)Cr(ox)3] M(II) =Mn, Fe, Co, Ni, Cu","authors":"F. Martak, D. Onggo, Ismunandar, A. Nugroho, N. Mufti, B. Yamin","doi":"10.3923/CRC.2009.1.7","DOIUrl":"https://doi.org/10.3923/CRC.2009.1.7","url":null,"abstract":"The mixed-metal [(C4H9)4P][M(II)Cr(ox)3] M(II) = Mn(1), Fe(2), Co(3), Ni(4), Cu(5) and ox is oxalate, has been prepared. X-ray powder diffraction patterns and their Rietveld refinement show that all the compounds along the series are isostructural and siglephased. X-ray powder diffraction profiles are indexed in hexagonal and P63 space group. The magnetic susceptibility data obey Curie-Weiss law in temperature 300-5 K with a positive constans of 15,1 (1), 13.5 (2), 12.7 (3), 12.0 (4) and 11.0 K (5). The temperature dependence of the molar magnetizatior exhibits a magnetic phase transition at Tc = 12 K (1), 11 (2), 10 (3), 8(4), 7 K (5). At low temperature, the compounds complex exhibit long-range ordered magnetic behavior.","PeriodicalId":10941,"journal":{"name":"Current Research in Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91344077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Effect of Chitosan Molecular Weights on Characteristics of Silk Fibroin/Chitosan Blend Films 壳聚糖分子量对丝素/壳聚糖共混膜性能的影响
Current Research in Chemistry Pub Date : 2009-01-01 DOI: 10.3923/CRC.2009.8.14
Y. Baimark, P. Srihanam, Y. Srisuwan
{"title":"Effect of Chitosan Molecular Weights on Characteristics of Silk Fibroin/Chitosan Blend Films","authors":"Y. Baimark, P. Srihanam, Y. Srisuwan","doi":"10.3923/CRC.2009.8.14","DOIUrl":"https://doi.org/10.3923/CRC.2009.8.14","url":null,"abstract":"","PeriodicalId":10941,"journal":{"name":"Current Research in Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82416370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety 含双偶氮苯片段的两系非对称液晶二聚体的合成与表征
Current Research in Chemistry Pub Date : 2009-01-01 DOI: 10.3923/CRC.2009.15.21
A. Salisu, M. A. Rahman, S. Silong, Rahman Lutfor, M. Ahmad
{"title":"Synthesis and characterization of two series of non-symmetric liquid crystal dimer containing bisazobenzene moiety","authors":"A. Salisu, M. A. Rahman, S. Silong, Rahman Lutfor, M. Ahmad","doi":"10.3923/CRC.2009.15.21","DOIUrl":"https://doi.org/10.3923/CRC.2009.15.21","url":null,"abstract":"Two series of calamitic non-symmetric liquid crystalline dimer compound containing bisazobenzene moiety and a rather short alkoxybiphenyl linked by flexible spacers 4-propyloxy-[4-biphenyloxyalkyl]-4`-(4-phenylazo)azobenzene has been synthesized and characterized by spectroscopic methods. The transition temperatures and phase behaviours were studied by Differential Scanning Calorimetry (DSC), Polarizing Optical Microscopy (POM) and X-Ray Diffraction (XRD) study. The synthesized compounds exhibited enantiotropic liquid crystal phase with dimer (D1) containing pentyl flexible alkyl spacer showing smectic A and smectic C phases and dimer (D2) with hexyl spacer exhibitig SmA and nemetic phases respectively and the stability of the smectic layer depends on the spacer length for the compounds studied.","PeriodicalId":10941,"journal":{"name":"Current Research in Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90246048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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