Berlin 2015 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 44: P9: Crystallization, Nucleation and Self Assembly
CPP 44.4: Poster
Mittwoch, 18. März 2015, 10:00–13:00, Poster A
Ultra-fast scanning calorimetry of polymers implying cooling up to 10,000,000 K/s — •Evgeny Zhuravlev1, Sander van Herwaarden2, Vadlamudi Madhavi3, and Christoph Schick1 — 1University of Rostock, Rostock, Germany — 2Xensor Integration, Delft, Netherlands — 3ExxonMobil Research & Engineering Company, Annandale, NJ, USA
The complexity of polymer crystallization is often demonstrated on the example of simple polyethylene molecule. But it's simplicity can become a disadvantage. The simple molecules can crystallize so fast, that few to none experimental technique is able to follow it. Especially in the region of homogeneous nucleation - approaching a glass transition temperature from the melt - a point of controversy in polymer science. Bypassing glass transition, avoiding crystallization, for the purpose of it's further investigation at any desired temperature has been challenged by ultra-fast scanning calorimetry since years. Recent achievements has extended maximum possible cooling rate of nanogram sample up 10,000,000 K/s. Further reheating of this sample at 1,000,000 K/s, showing the glass transition, cold crystallization and melting of quenched polyethylene, is reported.