Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Networks   The two approaches to analyzing the large strain behavior of rubbery networks
are phenomenologically, using strain energy functions drawn from continuum
mechanics, and molecular models, which apply statistical mechanics to compute
the effect of chain orientation on the entropy. The early rubber elasticity
models ignored intermolecular interactions, whereas later developments
("constraint models") included the effect of entanglements or steric
constraints on the mechanical stress. These constitutive equations for rubber
elasticity are compared to experimental results, and the connection of network
elasticity to the relaxation behaviour is discussed. For conventional
elastomers there is a compromise between stiffness and strength. Different
methods to circumvent this limitation are described. Examples are given of the
properties obtained with novel network architectures, including
interpenetrating networks, double networks, bimodal networks, miscible
heterogeneous networks, and deswollen networks.

30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
18
The categories of this paper are: econ