Ontology highlight
ABSTRACT:
SUBMITTER: Pasquino R
PROVIDER: S-EPMC4517619 | biostudies-literature | 2013
REPOSITORIES: biostudies-literature
ACS macro letters 20130101 10
We have measured the linear rheology of critically purified ring polyisoprenes, polystyrenes and polyethyleneoxides of different molar masses. The ratio of the zero-shear viscosities of linear polymer melts <i>η<sub>0,linear</sub></i> to their ring counterparts <i>η<sub>0,ring</sub></i> at isofrictional conditions is discussed as function of the number of entanglements <i>Z</i>. In the unentangled regime <i>η<sub>0,linear</sub>/η<sub>0,ring</sub></i> is virtually constant, consistent with the ea ...[more]