Probing Hidden Phase Transitions in Plastic Crystal Succinonitrile
Source abstract
Abstract
A hidden phase transition in plastic crystal (PC) succinonitrile (SN) was revealed during slow heating. SN exhibits trans (0 D) and gauche (5.45 D) conformers. Synchrotron small- and wide-angle X-ray scattering (SWAXS) measurements detected the splitting of Bragg reflections near the melting point, indicating a symmetry reduction. Upon heating, the cubic PC phase transformed into a lower-symmetry crystal, namely a distinct ferro-like ordered phase (hereafter f C), which remained stable over the repeated thermal cycles. During the gradual PC– f C transition, additional diffuse scattering was observed in addition to orientational short-range-order diffuse scattering. Such a phase transition remains inaccessible under conventional heating rates (∼5 K/min) and is exclusively revealed by ultralow-rate (0.2 K/min) synchrotron SWAXS.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Liquid Crystal Research Advancements · Polymer crystallization and properties · Material Dynamics and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering
National Defense Academy
Department of Chemistry, Graduate School of Science
Chiba University
Department of Fundamental Energy Science, Graduate School of Energy Science
Kyoto University
Department of Materials and Life Sciences
Sophia University
Funding
Ministry of Education, Culture, Sports, Science and Technology
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