A
Continuum Surelite I-20 Nd:YAG pulsed laser is employed for
pulsed laser polymerisation (PLP) experiments. The laser is
capable of delivering three wavelengths: 1024 nm, 532 nm and
355 nm. The wavelength predominantly employed is 355 nm, which
provides a pulse energy up to 40 mJ per pulse with a beam
diameter of 6 mm.
Pulsing rates of up to 20 Hz are possible, as well as external
control of the laser firing for single-shot experiments.
An isothermal block maintains the reaction cell at a constant
temperature. This cell employs a recirculating fluid and includes
a feedback loop through a thermocouple attached to the side
of the reaction cell. Using this cell, it is possible to carry
out PLP experiments over a wide range of temperatures, from
-50 to +65°C. Above 65°C, a different controlled-temperatures
system enables experiments up to 120°C.
