non-isothermal crystallization behaviors of n,n,n',n'-tetraphenylbenzidine (tpb)
DESCRIPTION
Non-isothermal Crystallization Behaviors of N,N,N',N'-Tetraphenylbenzidine (TPB). Reporter : Xiaosi Ma Tutor : Prof. Shirong Wang School of chemical engineering and technology, Tianjin University, China. Outline. 1. Introduction. 2. Results and Disscusion. 3. Conclusion. 1. - PowerPoint PPT PresentationTRANSCRIPT
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Non-isothermal Crystallization Behaviors of N,N,N',N'-Tetraphenylbenzidine (TPB)
Reporter : Xiaosi MaTutor : Prof. Shirong Wang
School of chemical engineering and technology, Tianjin University, China
![Page 2: Non-isothermal Crystallization Behaviors of N,N,N',N'-Tetraphenylbenzidine (TPB)](https://reader035.vdocument.in/reader035/viewer/2022062816/56814bd9550346895db8b18c/html5/thumbnails/2.jpg)
Outline
1
2
3
Introduction
Results and Disscusion
Conclusion
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1 Introduction
thin and light
flexional
wide viewing angle
low operating voltage
fast response
self-luminous
high luminous efficiency
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1 Introduction
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1 Introduction
high mobility
good film forming ability
appropriate energy level of
HOMO and LUMO
high thermal stability
Hole transporting materials
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1 Introduction
Carbazole derivatives Pyrazoline derivatives Hydrazone derivatives
Styrene derivatives Triphenylamine derivatives
N
NNN NN N
NN N
N NN
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Result
2 Results and Discussion
80 100 120 140 160 180
100 120 140 160 180
0
1
2
Hea
t Flo
w (W
/g)
Temperature (°C)
20 /min℃
Exot
herm
al
Temperature (°C)
5 /min℃7.5 /min℃
10 /min℃
15 /min℃
20 /min℃
30 /min℃
Fig. 1 The cold crystallization curves of TPB
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Jeziorny method
2 Results and Discussion
-2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0-4
-3
-2
-1
0
1
2
5 /min℃ 7 /min℃ 10 /min℃ 15 /min℃ 20 /min℃ 30 /min℃
ln[-l
n(1-X t
)]
ln t
Φ/(oC•min-1) 5 7.5 10 15 20 30
n 3.39 4.23 3.75 2.85 3.39 3.23
Zc 0.96 1.00 1.01 1.03 1.05 1.09
Fig. 2 The Avrami curves of TPB
Tab. 1 The Jeziorny parameters of TPB
Avrami equationln[- ln(1- Xt)] = ln Zt + nln
t
Jeziorny equationln Zc = ln Zt /Φ
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Ozawa method
2 Results and Discussion
1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4
-4
-3
-2
-1
0
1
2
X t
ln Φ
125 ℃
126 ℃
127 ℃
128 ℃
129 ℃130 ℃131 ℃132 ℃ 133 ℃
135 ℃137 ℃
T/oC 128 129 130 131 132 133
K 17 77 161 276 424 788
m 1.51 1.89 2.01 2.06 2.08 2.18
Fig. 3 The Ozawa curves of TPB
Tab. 2 The Ozawa parameters of TPB
Ozawa equation
ln[-ln(1-Xt)]=lnK–mlnΦ
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Mo method
2 Results and Discussion
-2.0 -1.5 -1.0 -0.5 0.0 0.5 1.01.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
10% 30% 50% 70% 90%
ln Φ
ln t
relative crystallinity( %) 10 30 50 70 90
F(T) 4.53 6.75 8.33 9.68 11.82
Fig. 6 The Mo curves of TPB
Tab. 3 The Mo parameters of TPB
Mo equation
lnΦ = ln F(T) -αln t
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XRD
2 Results and Discussion
100 120 140 160 180 200
0
1
2
Hea
t Flo
w (W
/g)
Temperature (°C)
cold crystallization peak
exothermic peak
20 oC/min
0 5 10 15 20 25 30 35 40 45
2 θ (°)
TPB sample
cold crystallization at 160 oC
cold crystallization at 130 oC
Fig. 7 The DSC curve of TPB Fig. 8 The XRD patterns of TPB
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3 Conclusion
2
2
1
The nucleation type is affected by the heating rate
The crystallization rate of TPB increases with the heating rate
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Acknowledgment
Financial Support
13
National Natural Science Found-ation of China (21176180)
National High Technology Research and Development Program of China (2012AA030607)
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Thanks for your
attention!