caa a22 4500 37892172X CHVBK 20180305123607.0 cr unu---uuuuu 161128e20040101xx s 000 0 eng 10.1351/pac200476071353 doi (NATIONALLICENCE)gruyter-10.1351/pac200476071353 Morphology of blends of self-assembling long-chain carbamate and stearic acid [Elektronische Daten] [M. Moniruzzaman, P. R. Sundararajan] The morphology of blends of two types of hydrogen-bonding systems was studied with a view to understanding the effect of blending on the extent of hydrogen bonding and changes in the morphology.One of them is the long-chain carbamate with a C18 alkyl side chain, and the other is stearic acid, which also has a C17 alkyl chain. At low concentrations, the C18 carbamate reduces the size of the crystals of stearic acid. However, the stearic acid has no effect on the morphology of the carbamate. The morphological changes are due to the disruptive packing of the alkyl chains, rather than a change in the extent of hydrogen bonding. The blends of homologous carbamates studied before [Moniruzzaman, Goodbrand, Sundararajan, J. Phys. Chem. Part B107, 8416 (2003)] are more effective in mutually controlling the spherulite size and imparting transparency than the carbamate/stearic acid blend. The presence of the carbamate as the minor component changes the ratio of the intensities of the X-ray reflections at 2 (theta)=21.6 and 2.21°. It is found that in the blends with the carbamates quenched from the melt, the stearic acid exhibits a polymorphic transition from the E to the C form in the differential scanning calorimetry (DSC) analysis. © 2013 Walter de Gruyter GmbH, Berlin/Boston Moniruzzaman M. Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada aut Sundararajan P. R. Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada aut Pure and Applied Chemistry De Gruyter 76/7-8(2004-01-01), 1353-1363 0033-4545 76:7-8<1353 2004 76 pac https://doi.org/10.1351/pac200476071353 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1351/pac200476071353 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Moniruzzaman M. Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada aut NATIONALLICENCE 700 1- Sundararajan P. R. Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada aut NATIONALLICENCE 773 0- Pure and Applied Chemistry De Gruyter 76/7-8(2004-01-01), 1353-1363 0033-4545 76:7-8<1353 2004 76 pac CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter