DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2002 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

CPP: Chemische Physik und Polymerphysik

CPP 4: Poster: Dynamik in polymeren Systemen

CPP 4.2: Poster

Monday, March 11, 2002, 13:30–15:00, B

Short Time Dynamics of a Realistic Model of a Polybutadiene Melt — •Stephan Krushev and Wolfgang Paul — Institut für Physik, Universität Mainz

We study through molecular dynamics the short time behavior of a melt of polybutadiene (PBD) for different temperatures above Tg. Through a comparison of the chemically realistic (CRC) model and a structurally equivalent freely rotating chain (FRC) model we study the effect of rotational barriers on the dynamics of this polymer. The dynamical correlation functions show a plateau similar to the cage effect in glassy dynamics, but they violate the factorization theorem of mode coupling theory. Thus four particle interactions, that constitute the torsional stiffness, cause an effect similar to glassy dynamics, that differs significantly from known patterns for simple liquids and simple polymers.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2002 > Regensburg