  In Particle and Nuclear Physics research and related applications, organic
scintillators provide a cost-effective technology for the detection of ionising
radiation. The next generation of experiments in this field is driving
fundamental research and development on these materials, demanding improved
light yield, radiation hardness, and fast response. Common materials such as
PEN and PET have been found to offer scintillation properties competitive to
commercial alternatives without the use of dopants. Motivated by their
complementarity in terms of light yield, radiation hardness, and response time,
there is an increasing interest in investigating PET:PEN mixtures to ascertain
whether they exhibit synergistic blending. This paper presents results from the
systematic development of samples of PET, PEN, and PET:PEN mixtures with varied
mass proportions. The manufacturing technique, involving injection moulding of
granule raw material, is detailed. The effects of doping the polymer base
substrate with fluorescent dopants are explored. Finally, the emission spectra
of the different material compositions and their relative light output are
presented.
