Journal of Textile Research ›› 2018, Vol. 39 ›› Issue (12): 1-6.doi: 10.13475/j.fzxb.20180105706

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Nonisothermal crystallization kinetics of novel nylon-carbon chain polyamide 1211

  

  • Received:2018-01-25 Revised:2018-08-26 Online:2018-12-15 Published:2018-12-17

Abstract:

Aiming at the problems that the mechanical properties of polymer were influenced by themicrocrystalline structure, polyamide 1211 was prepared by one-step polymerization, and the mechanicalproperties of polyamide 1211 were ontrolled by controlling the microcrystalline structure thereof. The nonisothermal crystallization of polyamide 1211 was studied by differential scanning calorimeter. Nonisothermal crystallization kinetics of polyamide 1211 was studied using the Avrami equations modified by Jeziorny method and Mo method. The results obtained by Jeziorny method exhibit that the nonisothermal crystallization kinetics of polyamide 1211 comprises two stages. The Avrami index is ranged from 2. 51 to 3. 22 during the main crystallization stage process, and the crystal grows in a twodimensional disk state. In the sub crystallization stage process, the Avrami index is 0. 99 -2. 14, and the crystal grows in a one-dimensional fiber state. The cooling rate value is 14. 91 -37. 57. In addition, the activation energy of nonisothermal crystallization for polyamide 1211 acquired by Kissinger method is -115 kJ/mol.

Key words: long-carbon chain polyamide 1211, nonisothermal crystallization kinetics, crystallization activation energy, microcrystalline structure

CLC Number: 

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