Table 1. List of the tested IR absorbers1:
IR Absorber
Mineralogical
composition
Fe2O3
µm
name
NS I
Nepheline syenite
Particle size
SiO2 :60.8%
0.06%
2.6
0.07%
6.7
0.03%
5
Al2O3 : 23.5%
Na2O : 10.9%
K2O :.4.9%
NS I
Nepheline syenite
SiO2 :60.8%
Al2O3 : 23.5%
Na2O : 10.9%
K2O :.4.9%
AS
Aluminium silicate
SiO2 :82%
Al2O3 : 9.5%
CR
Cristobalite
SiO2 : 99.5%
0.03%
5
TL
Talk
SiO2 :62.1%
0.12%
15
0.6%
6.2
2%
0.8
MgO : 30.7%
CC
Calcinated china
clay
OC
SiO2 :55%
Al2O3 : 42%
Bentonite (Organo
SiO2 :55%
treated clays/
Al2O3 : 20.5%
(precursor for
Na2O : 3%
nanocomposites)
MgO :.2.5%
Mineral composition, size and iron content were taken from the supplier’s specifications
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1
Figure 1. Absorption curves of the different absorbers in the mid IR region
3
CR
OC
TL
AS
NS
2.5
Absorbance
2
1.5
1
0.5
0
750
850
950
1050
1150
1250
1350
Wavelength (cm-1)
Figure 2. Transmission curves of the different absorbers in the mid IR region
comparative to non filled LDPE
100
90
80
Transmission, %
70
60
50
40
LDPE
NS
CC
AS
TL
CR
OC
30
20
10
0
1430
1380
1330
1280
1230
1180
1130
1080
1030
980
930
880
830
780
730
Wavenumber, cm-1
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Figure 3. Thermisity of the IR absorbers at different film thickness
Thermicity, 5% IR absorber
45
NS
AS
CR
TL
CC
OC
40
thermicity
35
30
25
20
15
10
90
110
130
150
170
190
210
Film thikness (µm)
Table 2. Thermisity of the IR absorbers at different concentration
IR absorber
NS I
NS II
CC
AS
TL
CR
OC
PE_LD
Thermicity, %
5% IR
10% IR
absorber
absorber
38
37
32
39
40
33
39
64
27
28
17
26
28
18
30
64
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Figure 4. Thermisity of the LDPE film filled with the 5% of the IR absorber
5% IR absorber, 150 mkm PE films
31
OC
22
CC
31
TL
22.5
CR
AS
OC
CC
TL
CR
AS
NS II
NS I
24
28
NS II
29
NS I
10
15
20
25
30
35
Thermicity,%
Figure 5. Forward scattering of the visible light by LDPE film filled with the 5% of
the IR absorber
5% IR Absorber, 150mkm PE film
33
OC
35
CC
44
TL
36
CR
AS
34
NS II
34
OC
CC
TL
CR
AS
NS II
NS I
28
NS I
10
15
20
25
30
35
40
45
Haze, %
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50
Figure 6. Carbonyl peak area development as function of the QUV exposure time
CR
NSII
CC
NS I
TL
AS
OC
20
Carbonyl peak
15
10
5
0
0
50
100
150
200
250
300
350
400
450
500
QUV (h.)
550
1
500
0.9
0.8
450
0.7
0.6
350
0.5
300
0.4
250
0.3
200
0.2
150
0.1
100
0
NS I
CC
AS
TL
CR
OC
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Fe2O3 content
QUV exposure time
400
Figure 8. Blocking efficiency of BZT and IR absorber compounded LDPE films as
function of the QUV exposure time
110
100
Blocking efficiancy
90
80
70
BZT
NS
CR
CC
TL
AS
60
50
40
0
200
400
600
800
1000
1200
Exposure time (h.)
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