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

Dario Cavallo; Daniela Mileva; Giuseppe Portale; Li Zhang; Luigi Balzano; Giovanni C Alfonso; René Androsch

doi:10.1021/mz300349z

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

ACS Macro Lett. 2012 Aug 21;1(8):1051-1055. doi: 10.1021/mz300349z. Epub 2012 Aug 2.

Authors

Dario Cavallo¹, Daniela Mileva², Giuseppe Portale³, Li Zhang⁴, Luigi Balzano⁵, Giovanni C Alfonso⁴, René Androsch²

Affiliations

¹ Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
² Center of Engineering Sciences, Martin-Luther-University Halle-Wittenberg, D-06099 Halle/Saale, Germany.
³ DUBBLE CRG, European Synchrotron Radiation Facility, Netherlands Organization for Scientific Research (NWO), BP 220, F-38043, Grenoble Cedex, France.
⁴ Department of Chemistry and Industrial Chemistry, University of Genova, via Dodecaneso, 31-16146 Genova, Italy.
⁵ Material Science Center, DSM Ahead, P.O. Box 18, 6160MD, Geleen, The Netherlands.

PMID: 35607036
DOI: 10.1021/mz300349z

Abstract

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.