Transcript Advanced UV System P-PTD 120
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Advanced UV System P-PTD120
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Advanced UV System P-PTD 120
Peltier controlled optical transparent base plate Can be combined with Peltier hood (H-PTD 200) Temperature range 0 – 120 ° C Has a holder for a UV light guide underneath External UV-source can be connected P-PTD 120 / UV: Not just for UV-Curing !
Can be used for: Flow visualization and microscopy
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Advanced UV System P-PTD 120
Features:
Fast data acquisition with DSO Software controlled shutter Sample is protected against external light sources and day light Closed system, purging with inert gas possible Temperature calibration routine with certified temperature probe Sensitive normal force control ( auto shrinkage compensation ) Auto gap control (compensation for thermal expansion of geometries) Compliance correction UV curing in combination with fast, accurate and gradient reduced temperature control Perfect system for applications where the sample first is stabilized (Gel) with UV and then cured with temperature
4 Viscoelastic Behavior
Time - dependent UV Curing
coatings polymers
UV – reactive resin, fast curing reaction
10 10 Pa 10 6 lg G' 10 4 lg 0.01
0.1
curing
1 time
t
10 s 100 10 0.1
rigid finally since G
'
> 1 GPa (already after t = 10 s) 1 lg tan 0.01
MS - PP 08 g = 0
.
02 %
ω
= 63 rad/s tan ( = 10 Hz) = G
''
/ G
'
5 Viscoelastic Behavior
Time - dependent UV Curing
10 8 Pa 10 6 lg G' 10 4
curing process
printing inks polymers
UV printing ink
at variable UV - intensities 10 2
I = 50 / 40 / 30 / 20 / 10 / 5 / 4 / 3 / 2 / 1 %
Summary:
Faster
curing process
with increasing UV light intensity I
(here for I = 1 to 50%) 0 20 40 60 80 time
t
100 120 s 140
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lg G
'
G
''
10 5 Pa 10 3 10 -1 0
curing
10 1
G '' > G '
gel point G ' = G ''
400
coatings polymers
G ' > G '' UV resin
„soft touch“, since finally G
'
= 0
.
1 MPa 50
T
bottom: plate of quartz-glass 45 °C 40 35 g = 0
.
1 %, ω = 10 rad/s, T = +23°C 800 time
t
1200 1600 s 30 2000 temperature peak: end of the exothermic crosslinking reaction
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Advanced UV System P-PTD 120
Application: Flow Visualization I
Surfactant solution with air bubbles
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Advanced UV System P-PTD 120
Application: Flow Visualization II
Tooth Paste