Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure of hybrid polymer by numerical simulation: example of
  $(Si(CH_3)_2)_n(OSiO)_p(OH)_q$   The structure depends on the mechanism of hydrolyse and polycondensation in
the case sol-gel process used to obtain hybrid polymers containing uniquely
covalent bonds. We computed by a tight binding calculation taking into account
hybridization, the total electronic energy of different structures (amorphous,
fractal and linear) of $(Si-(CH_3)_2)_n-(OSiO)_p(OH)_q$. We found that the
total electronic energy of the amorphous structure was the smallest as a
function of the number of atoms contained by the structure. As the total
electronic energy is linked to the toughness of the structure, we may say that
the structure of such hybrid polymer has the highest toughness for the
amorphous structure.

28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex