Synthesis and radioprotective properties of certain diol lipids
作者:L. A. Chechulina、S. M. Puchkova、A. P. Novikova、Z. M. Baskakova、V. I. Vysokov、G. B. Afanas'eva
DOI:10.1007/bf00770450
日期:1985.3
Naudet,M.; Derbesy,M., Bulletin de la Societe Chimique de France, 1963, p. 173
作者:Naudet,M.、Derbesy,M.
DOI:——
日期:——
Schlenk,W., Justus Liebigs Annalen der Chemie, 1969, vol. 727, p. 1 - 9
作者:Schlenk,W.
DOI:——
日期:——
Staudinger; Schwalenstoecker, Chemische Berichte, 1935, vol. 68, p. 729
作者:Staudinger、Schwalenstoecker
DOI:——
日期:——
Monotropic Polymorphism in Ester-Based Phase Change Materials from Fatty Acids and 1,4-Butanediol
作者:S. Cabus、K. Bogaerts、J. Van Mechelen、M. Smet、B. Goderis
DOI:10.1021/cg400339z
日期:2013.8.7
This article reports on the synthesis, thermal behavior, and morphology of phase change materials based on diesters from 1,4-butanediol with palmitic (BD16), stearic (BD18), or behenic (BD22) acid. The crystalline contents and melting enthalpies of all substances exceed 90% and 180 J/g, respectively. The molecules display monotropic polymorphism. The metastable beta' form is built from outstretched molecules, whereas the denser, stable beta form is composed of molecules with a kinked conformation. BD18 and BD22 crystallize into the beta' form during cooling. Only BD18 transforms into the beta form during subsequent heating via a solid-solid transition. The resistance of BD22 to convert into the beta form is believed to originate from the lack of mobility associated with longer aliphatic chains. In contrast, the polymorphic conversion is thought to be very efficient and to take place during cooling for the shorter BD16 molecules. The hypothesis is put forward that the original BDI6 beta' nuclei are rapidly overgrown by the beta phase by which crystal growth is postponed to larger supercooling where the beta phase can grow from the melt. Consequently, BD16 only occurs in the beta form. The melt crystallization of BD18 and BD22 into the beta' form hardly requires any supercooling.