Chiral probes of time scale and length scale of motion in polycarbonate melts and glasses

Ji Woong Park, Mark D. Ediger, Mark M. Green

Research output: Contribution to journalConference article

Abstract

The racemization kinetics of polycarbonate (PC) probes in dilute solution of decalin were studied. The racemization in PC showed considerable deviation from the kinetics in small molecule solvents in all cases except for the smallest probe BNO. Shorter time scale of probe motion resulted in kinetics closer to the exponential of the physical aging, which were the cause of the non-exponential kinetics observed in the thermal racemization. Since the time scale of probe motion in the photo-racemization was shorter than in the thermal-racemization, it intersects that the segmental relaxation time of the PC at a higher temperature and started slowing deviation from first order kinetics at higher temperature.

Original languageEnglish (US)
Pages (from-to)955-956
Number of pages2
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume41
Issue number1
StatePublished - Mar 2000
EventThe San Francisco Meeting - San Francisco, CA, USA
Duration: Mar 26 2000Mar 31 2000

ASJC Scopus subject areas

  • Polymers and Plastics

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