Non-isothermal crystallization of monomer casting polyamide 6/functionalized MWNTs nanocomposites |
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Authors: | Shangchang Qiu Yuying Zheng Anran Zeng Yong Guo Baoming Li |
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Affiliation: | (1) College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, 350108, Fujian, China;(2) College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, Fujian, China; |
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Abstract: | Monomer casting polyamide 6(MCPA6)/toluene 2,4-diisocyanate functionalized multi-walled carbon nanotubes (MWNTs-NCO) nanocomposites
were prepared via in situ anionic ring opening polymerization, and the non-isothermal crystallization behavior of the nanocomposites
were investigated by differential scanning calorimetry with various cooling rates. The commonly used Avrami, Ozawa, Mo, and
Urbanovici–Segal models were employed to analyze the non-isothermal crystallization data and the validity of the models on
the process of MCPA6 and its nanocomposites was discussed, where Mo and Urbanovici–Segal models could well describe the non-isothermal
crystallization process for the samples. The results revealed that MWNTs could accelerate the crystallization process of MCPA6,
attributing to the nucleating effect of the nanofillers. Finally, the effective energy barrier for non-isothermal crystallization
was evaluated as a function of the relative crystallinity by applying an isoconversional method. |
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