Acrylated Silicones Suitable for SLA 3D [email protected], 416-424-4567 x y Reactive...
Transcript of Acrylated Silicones Suitable for SLA 3D [email protected], 416-424-4567 x y Reactive...
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Acrylated Silicones Suitable
for SLA 3D Printing
Bob Ruckle and Tom Seung-Tong Cheung
Siltech Corp, Toronto, ON
[email protected], 845–592-4075
[email protected], 416-424-4567
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x y
Reactive Silicones
x y
x y
x y
x y
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Hydroxy
Acrylate
Acrylate
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Acrylated Silicone Types
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Linear, Di-functional
Extender
Pendant, Multi-functional
Cross-Linker
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Acrylated Silicones
Name Type Equivalent Weight
Lin 650 Linear Di-functional 650
Lin 1000 Linear Di-functional 1000
Lin 1200 Linear Di-functional 1200
Lin 2500 Linear Di-functional 2500
Pen 300 Multi-Functional 300
Pen 600 Multi-Functional 600
Pen 1000 Multi-Functional 1000
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Experimental
• Materials are cured in a TA Instrument AR-G2
Rheometer using:
– 150 mW/cm2 LCD UV lamp at 365nm
– UV lamp turned on at 300 sec. for 600 sec.
– Strain Set at 0.05% with normal force control
• Properties measured with an Instron 1122
according to ASTM D412 using separately cured
dumbbells.
• Dumbbells were 3D printed with a SLA type 3D
printer from Full Spectrum Laser
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Pegasus Touch from FSL3D
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Formulations
5% 10% 20% 30%
Sartomer CN 991 8.40% 7.96% 7.07% 6.18% Laromer UA-9072 47.08% 44.58% 39.61% 34.64% Laromer LR-8887 34.40% 32.57% 28.94% 25.31% Sartomer SR833S 3.91% 3.70% 3.29% 2.88% Silicone Acrylate 5.00% 10.04% 20.07% 30.10% TPO 1.04% 0.98% 0.87% 0.76% Silmer ACR Di-10 0.17% 0.17% 0.15% 0.13% Total 100.00% 100.00% 100.00% 100.00%
1. Soft Formulation
2. Proprietary In-House Hard Formulation
3. Commercial Resin from Printer Manufacturer
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3D Printed Dumbbells
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0
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5
0%
5%
10%
20%
30%
5%
10%
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%
30%
5%
10%
20%
30%
5%
10%
20%
30%
control Lin 650 Lin 2500 Lin 1000 PEN 600
rating
Flexibility Tackiness
Flexibility and Tack in Soft
Formulation Less Tack
More Flex
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Elongation and Strain in Soft
Formulation
0
10
20
30
40
50
60
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0
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30
40
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60
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0%
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control Lin 650 Lin 2500 Lin 1000 PEN 600
% kPa
Avg Strain 2 at Abs.Peak
Avg Extension %at peak
More Flex
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Stress and Energy in Soft
Formulation
0
100
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1000
0
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0%
5%
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30%
5%
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20%
30%
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10%
20%
30%
5%
10%
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control Lin 650 Lin 2500 Lin 1000 PEN 600
mJ/mm kPa Max Tensile Stress at Abs.Peak (kPa)
Max Total Energy/Thickness(mJ/mm)
More Strength
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Tensile Strength In-House Hard
Formulation
0
5000
10000
15000
20000
25000
PEN 300 PEN 1000 LIN 1200 LIN 1000
kPa
Tensile Str.
More Strength
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Elongation and Energy
In-House Hard Formulation
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PEN 300 PEN 1000 LIN 1200 LIN 1000
mJ/m %
% Elongation Total energy
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Elongation and Bending of PEN
300 in Commercial Formulation 0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.00.0%
0.5%
1.0%
1.5%
2.0%
2.5%
3.0%
3.5%
4.0%
4.5%
5.0%
Control 5% 10% 20% 30% 40%
cm
Extension % at Break Bending distance , cm
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0
5000
10000
15000
20000
25000
30000
35000
400000
10
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60
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Control 5% 10% 20% 30% 40%
Hardness Shore D Tensile stress at Break(kPa)
Stress and Hardness of PEN
300 in Commercial Formulation
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Stress and Hardness in
Commercial Formulation
50
55
60
65
70
75
80
85
900
10000
20000
30000
40000
50000
60000
0 10% 20% 30% 10% 20% 30% 10% 20% 30%
Control Pen 1000 Lin 1200 Lin 1000
Shore D kPa Tensile stress at Abs Peak (kPa) Hardness (Shore D)
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Elongation and Bending vs. Use
Level: Commercial Formulation
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0 10% 20% 30% 10% 20% 30% 10% 20% 30%
Control Pen 1000 Lin 1200 Lin 1000
cm %
Extension% at Peak Bending distance (cm)
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• Starting to have success adding flexibility
and elongation to commercial formulation
• Hardness is compromised
Summary
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• More Formulation
• Minimize Hardness Loss
Future Work