Ito Asae, Shin Arisa, Nitta Koh-Hei
Polymer Physics Laboratory, Institute of Science and Engineering, Kakuma Campus, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan.
Molecules. 2022 Oct 21;27(20):7114. doi: 10.3390/molecules27207114.
We investigated the effects of water absorption on the dynamic mechanical properties of poly(methyl methacrylate) doped with various generic lithium salts, such as lithium perchlorate trihydrate (LiClO), lithium trifluoromethanesulfonate (LiCFSO), lithium nonafluorobutanesulfonate (LiCFSO), and lithium bis(trifluoromethanesulfonyl)imide (LiN(CFSO)). The rates of weight change during water absorption of lithium salt-doped samples were higher in the following order: LiClO, LiCFSO, LiCFSO, and LiN(CFSO). Interestingly, the aforementioned order was the same as the order of the terminal relaxation times in the flow region of the viscoelastic measurement in the melting-state. This implies that the water absorption of the salt-doped PMMA occurs due to the factors that affect the pinning of the PMMA molecular chains in the places.
我们研究了吸水对掺杂各种通用锂盐的聚甲基丙烯酸甲酯动态力学性能的影响，这些锂盐包括三水合高氯酸锂（LiClO）、三氟甲磺酸锂（LiCFSO）、九氟丁烷磺酸锂（LiCFSO）和双（三氟甲磺酰）亚胺锂（LiN(CFSO)）。掺杂锂盐样品在吸水过程中的重量变化率按以下顺序升高：LiClO、LiCFSO、LiCFSO和LiN(CFSO)。有趣的是，上述顺序与熔融态粘弹性测量流动区域中末端松弛时间的顺序相同。这意味着掺杂盐的聚甲基丙烯酸甲酯的吸水是由于影响聚甲基丙烯酸甲酯分子链在这些位置固定的因素所致。
