a.Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China
b.Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing 100029, China
c.Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
E-mail lj200321039@163.com (J.L.)
E-mail wangzhaoqd@163.com (Z.W.)
收稿:2017-07-05,
录用:2017-7-18,
网络首发:2017-10-08,
纸质出版:2018-01-05
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Yang-Yang Gao, Feng-Yan Hu, Jun Liu, 等. Molecular Dynamics Simulation of the Glass Transition Temperature of Fullerene Filled
Yang-Yang Gao, Feng-Yan Hu, Jun Liu, et al. Molecular Dynamics Simulation of the Glass Transition Temperature of Fullerene Filled
Yang-Yang Gao, Feng-Yan Hu, Jun Liu, 等. Molecular Dynamics Simulation of the Glass Transition Temperature of Fullerene Filled
Yang-Yang Gao, Feng-Yan Hu, Jun Liu, et al. Molecular Dynamics Simulation of the Glass Transition Temperature of Fullerene Filled
In this work
the effect of the fullerene (C
60
) weight fraction and PB-C
60
interaction on the glass transition temperature (
T
g
) of polymer chains has been systemically investigated by adopting the united atom model of
cis
-1
4-poly(butadiene) (
cis
-PB). Various chain dynamics properties
such as atom translational mobility
bond/segment reorientation dynamics
torsional dynamics
conformational transition rate and dynamic heterogeneity of the
cis
-PB chains
are analyzed in detail. It is found that
T
g
could be affected by the C
60
weight fraction due to its inhibition effect on the mobility of the
cis
-PB chains. However
T
g
is different
which depends on different dynamics scales. Among the chain dynamics properties
T
g
is the lowest from atom translational mobility
while it is the highest from the dynamic heterogeneity. In addition
T
g
can be more clearly distinguished from the dynamic heterogeneity; however
the conformational transition rate seems to be not very sensitive to the C
60
weight fraction compared with others. For pure
cis
-PB chains
T
g
and the activation energy in this work can be compared with those of other polymers. In addition
the temperature dependence of the dynamic properties has different Arrhenius behaviors above and below
T
g
. The activation energy below
T
g
is lower than that above
T
g
. This work can help to understand the effect of the C
60
on the dynamic properties and glass transition temperature of the
cis
-PB chains from different scales.
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