Constructing crystalline PTMO

Hi users!

I constructed single PTMO polymer using EMC
polymer.esh code is shown below

#!/usr/bin/env emc_setup.pl

# Options

ITEM    OPTIONS

project         PTMO
replace         true
field           trappe
density         0.01
temperature     0.1
number          true
focus           true
build_dir       .
shape           3

ITEM    END

# Groups

ITEM    GROUPS

Hydrogen        *H, 1,TMO:2
Hydroxy         *O, 1,TMO:1
TMO             *CCCCO*, 1,TMO:2

ITEM    END

# Clusters

ITEM    CLUSTERS

poly            alternate       1

ITEM    END


# Polymers

ITEM    POLYMERS

poly
100             TMO,5,Hydrogen,1,Hydroxy,1

ITEM    END

But I want to make crystalline PTMO using EMC which is mentioned in this paper

Lempesis, Nikolaos, Pieter J. in ‘t Veld, and Gregory C. Rutledge. “Atomistic simulation of the structure and mechanics of a semicrystalline polyether.” Macromolecules 49.15 (2016): 5714-5726.
(https://pubs.acs.org/doi/full/10.1021/acs.macromol.6b00555)

Is there some option to do this process in EMC?
Or to make crystalline structure of PTMO, it is necessary to use periodic boundary condition and optimize it using lammps?

Thank you for patient!