A nonequilibrium constitutive equation for the stress-strain behavior of water-absorbed poly(methyl methacrylate)-based materials
A nonequilibrium constitutive equation for the stress-strain behavior of water-absorbed poly(methyl methacrylate)-based materials
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DOI：
10.1002/pen.26372
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发表时间：
2023-05-23
影响因子：
3.2
通讯作者：
Nitta，Koh-hei
中科院分区：
文献类型：
--
作者：
Ito，Asae;Shin，Arisa;Nitta，Koh-hei
本文研究了三氟甲磺酸锂（LiCF 3SO 3）掺杂聚甲基丙烯酸甲酯（PMMA）的吸水性对其拉伸行为的影响。结果表明，由于PMMA/LiCF_3SO_3体系具有良好的吸水性，可以通过控制体系中盐的含量来控制体系的含水量。此外，有人发现，干燥的PMMA/LiCF 3SO 3是更脆的相比，一个原始的PMMA;然而，PMMA/LiCF 3SO 3样品含有高水位表现出高的可拉伸性。使用动力学机制表示脆性到韧性的转变，在该动力学机制中，在盐周围积累的水点遍布整个样品试样并拉伸至均匀吸水的条件。
In this work, the water absorption effects on the tensile behavior of a poly(methyl methacrylate) (PMMA) doped with lithium trifluoromethanesulfonate (LiCF3SO3) was investigated. It was found that the water content in the PMMA/LiCF3SO3system could be controlled using the salt content because of the system's remarkable water absorbability. Moreover, it was found that a dried PMMA/LiCF3SO3is more brittle compared to a pristine PMMA; however, PMMA/LiCF3SO3samples containing high water level demonstrated high drawability. The brittle‐to‐ductile transition was represented using a kinetic mechanism in which water spots accumulated around salts were spread throughout a whole sample specimen and stretched to a homogeneously water‐absorbed condition.