Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Boson peak, elasticity, and glass transition temperature in polymer
  glasses: Effects of the rigidity of chain bending   The excess low-frequency vibrational spectrum, called boson peak, and
non-affine elastic response are the most important particularities of glasses.
Herein, the vibrational and mechanical properties of polymeric glasses are
examined by using coarse-grained molecular dynamics simulations, with
particular attention to the effects of the bending rigidity of the polymer
chains. As the rigidity increases, the system undergoes a glass transition at a
higher temperature (under a constant pressure), which decreases the density of
the glass phase. The elastic moduli, which are controlled by the decrease of
the density and the increase of the rigidity, show a non-monotonic dependence
on the rigidity of the polymer chain that arises from the non-affine component.
Moreover, a clear boson peak is observed in the vibrational density of states,
which depends on the macroscopic shear modulus $G$. In particular, the boson
peak frequency is scaled as $\omega_\mathrm{BP} \propto \sqrt{G}$. These
results provide a positive correlation between the boson peak, shear
elasticity, and the glass transition temperature.

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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
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The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: math