Mesophase-Mediated Crystallization of Poly(butylene-2,6-naphthalate): An Example of Ostwald's Rule of Stages.

Autor:	Cavallo D; Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands., Mileva D; Center of Engineering Sciences, Martin-Luther-University Halle-Wittenberg, D-06099 Halle/Saale, Germany., Portale G; DUBBLE CRG, European Synchrotron Radiation Facility, Netherlands Organization for Scientific Research (NWO), BP 220, F-38043, Grenoble Cedex, France., Zhang L; Department of Chemistry and Industrial Chemistry, University of Genova, via Dodecaneso, 31-16146 Genova, Italy., Balzano L; Material Science Center, DSM Ahead, P.O. Box 18, 6160MD, Geleen, The Netherlands., Alfonso GC; Department of Chemistry and Industrial Chemistry, University of Genova, via Dodecaneso, 31-16146 Genova, Italy., Androsch R; Center of Engineering Sciences, Martin-Luther-University Halle-Wittenberg, D-06099 Halle/Saale, Germany.
Jazyk:	angličtina
Zdroj:	ACS macro letters [ACS Macro Lett] 2012 Aug 21; Vol. 1 (8), pp. 1051-1055. Date of Electronic Publication: 2012 Aug 02.
DOI:	10.1021/mz300349z
Abstrakt:	The investigation of poly(butylene-2,6-naphthalate) crystallization by means of chip-calorimetry and ultrafast wide-angle X-ray diffraction (WAXD) revealed the existence of two possible mechanisms. The formation of the stable triclinic α-phase occurs directly from the undercooled melt at low cooling rates/high crystallization temperature. At higher cooling rates a two-stage route is observed: crystallization is preceded by the formation of a mesomorphic phase from the isotropic melt. The monotropic behavior of poly(butylene-2,6-naphthalate), becoming apparent only under severe cooling conditions, obeys the well-known Ostwald's rule of stages.
Databáze:	MEDLINE
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