INVESTIGADORES
VEGA Daniel Alberto
artículos
Título:
Arm retraction potential of branched polymers in the absence of dynamic dilution
Autor/es:
VEGA DA; GOMEZ LR; ROTH LE; RESSIA J; VILLAR MA; VALLES EM
Revista:
PHYSICAL REVIEW LETTERS
Referencias:
Año: 2005 vol. 95 p. 166002 - 166006
ISSN:
0031-9007
Resumen:
We study the stress relaxation of model polymer networks containing low contents of star shaped and
linear dangling polymers. As compared with their melts, the behavior of star and dangling polymers leads
to a dynamic response with unprecedented large relaxation times. By comparing data of star melts with
those corresponding to stars and dangling chains residing in polymer networks, we were able to identify
the effects of dynamic dilution clearly. Since in polymer networks the dynamic dilution effect is
suppressed, we were able by the first time to experimentally test the validity of the potential for arm
retraction proposed by Pearson and Helfand.