文献类型：期刊文献

英文题名：Effect of SiO2 Particles on the Crystallization and Formation of Hydrogen Bonding in Biobased Polyamide 56

作者：Xun, Zijing[1];He, Guocheng[1];Huang, Yu[1];Yu, Ruobing[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：4

期号：7

起止页码：4949

外文期刊名：ACS APPLIED POLYMER MATERIALS

收录：;EI(收录号：20223112458805);WOS:【SCI-EXPANDED(收录号:WOS:000821941200001)】；

语种：英文

外文关键词：biobased PA56; crystallization; SiO2; in situ FTIR; 2D-IR spectra; hydrogen bonding

摘要：As PA56 cannot have 100% intermolecular hydrogen bonds (HBs) regardless of how the molecular chains are arranged, the crystallization properties of PA56 are not as good as those of petroleum-based nylon. To replace petroleum-based nylon and broaden the applications, it is necessary to improve the crystallization properties of PA56 and elaborate the relationship between crystallization and hydrogen bonding. In this work, nano-SiO2 with different particle sizes was chosen as the nucleation agent of biobased PA56, and the isothermal and nonisothermal crystallization of PA56 were investigated by differential scanning calorimetry (DSC). It was shown that SiO2 can significantly improve the crystallization properties of PA56 composites, especially for SiO2 with a smaller size. Furthermore, the influence of SiO2 on the formation of hydrogen bonds during the crystallization process was also studied by in situ Fourier transform infrared (FTIR) spectroscopy. The addition of SiO2 into PA56 plays a role in the increase of the conversion of the free carbonyl group to the hydrogen-bonded carbonyl group, which accelerates the formation of intermolecular HBs. The increase of HBs may be the factor for the improvement of the crystallization rate.