Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (03): 44-49.doi: 10.13475/j.fzxb.20210310006

• Fiber Materials • Previous Articles     Next Articles

Effect of thermal conductive structure on non-isothermal crystallization behavior of polyethylene terephthalate

XU Xiaotong1, JIANG Zhenlin1,2,3(), ZHENG Qinchao1, ZHU Keyu1, WANG Chaosheng3, KE Fuyou3   

  1. 1. School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
    2. Research Center for Advanced Mirco-and Nano-Fabrication Materials, Shanghai University of Engineering Science, Shanghai 201620, China
    3. Key Laboratory of High Performance Fibers & Products, Ministry of Education, Donghua University, Shanghai 201620, China
  • Received:2021-03-29 Revised:2021-10-21 Online:2022-03-15 Published:2022-03-29
  • Contact: JIANG Zhenlin E-mail:jiangzhenlin@sues.edu.cn

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Abstract:

The thermal conductive structure in polyethylene terephthalate will affect the processability of fiber materials and textiles, and various properties of the fiber. Polyethylene terephthalate (PET) composite containing carbon nanotubes (CNTs) and graphene (GR) was prepared by fusion mixing, and the non-isothermal crystallization kinetics of PET was studied by differential scanning calorimetry. The results show that doped carbon nanotubes and graphene act as nucleators in PET, and the increase in their mass fraction promotes the crystallization temperature, crystallization rate and crystallinity. The crystalline activation energies of pure PET, PETs doped with carbon nanotubes and graphene were -95.23、-160.27 and -176. 79 kJ/mol, respectively, calculated using Kissinger method. The increase of the absolute value of crystallization activation energy promotes the movement of macromolecule chain and accelerates the exothermic process of crystallization. The results show that CNTs and GR promote the crystallization rate and nucleation of PET, and the 2-D sheet thermal conductivity of graphene favors PET crystallization.

Key words: polyethylene terephthalate, graphene, carbon nanotube, non-isothermal crystallization kinetics, thermal conductive structure

CLC Number: 

  • TQ342

Fig.1

Non-isothermal crystallization curves of PET、PET/CNTs and PET/GR"

Tab.1

Non-isothermal crystallization parameters of PET,PET/CNTs and PET/GR"

样品名称 Φ/(℃·min-1) T0/℃ Te/℃ Tp/℃ t/min t1/2/min ΔHc/(J·g-1)
PET 10 206.29 178.71 196.29 28.12 24.12 44.88
20 197.66 159.33 183.35 23.04 21.20 41.66
30 192.28 142.29 174.27 21.44 19.45 42.20
PET/CNTs 10 212.55 193.47 205.76 26.51 23.13 44.40
20 204.54 177.06 195.57 22.33 19.61 42.70
30 202.20 173.73 193.26 19.11 18.38 44.00
PET/GR 10 209.21 188.29 202.64 26.23 23.09 44.28
20 202.75 179.17 195.10 21.67 19.64 44.97
30 198.66 173.47 190.70 19.86 18.52 44.83

Fig.2

Relationship between relative crystallinity and temperature"

Fig.3

Relationship between relative crystallinity and time"

Fig.4

Ozawa index m(a)and lgK(T)(b) curves of PET,PET/CNTs and PET/GR at different temperatures"

Fig.5

Non-isothermal crystallization activation energy of PET,PET/CNTs and PET/GR"

Tab.2

Crystallization activation energy of CNTs/PET,GR/PET with different contents"

质量分数/% ΔE/(kJ·mol-1)
PET/CNTs PET/GR
0.25 -160.27 -176.79
1.00 -133.11 -187.32
2.00 -127.80 -132.65
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