Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Decreased Thermal Conductivity of Polyethylene Chain Influenced by Short
  Chain Branching   In this paper, we have studied the effect of short branches on the thermal
conductivity of a polyethylene (PE) chain. With a reverse non-equilibrium
molecular dynamics method applied, thermal conductivities of the pristine PE
chain and the PE-ethyl chain are simulated and compared. It shows that the
branch has a positive effect to decrease the thermal conductivity of a PE
chain. The thermal conductivity of the PE-ethyl chain decreases with the number
density increase of the ethyl branches, until the density becomes larger than
about 8 ethyl per 200 segments, where the thermal conductivity saturates to be
only about 40% that of a pristine PE chain. Because of different weights,
different types of branching chains will cause a different decrease of thermal
conductivities, and a heavy branch will leads to a lower thermal conductivity
than a light one. This study is expected to provide some fundamental guidance
to obtain a polymer with a quite low thermal conductivity.

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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: nlin