The study of the crystallinity effect on the structural change of nylon 11 exposed to high-pressure hydrogen gas

被引：1

作者：

Ohyama, Keiko ^{[1
]}

Kaneko, Fumitoshi ^{[3
]}

Fujiwara, Hirotada ^{[4
]}

Nishimura, Shin ^{[1
,2
]}

机构：

[1] Res Ctr Hydrogen Ind Use & Storage HYDROGENIUS, Fukuoka, Japan

[2] Kyushu Univ, Fac Engn, 744 Motooka,Nishi ku, Fukuoka 8190395, Japan

[3] Osaka Univ, Fac Sci, 1-1 Machikaneyama cho, Toyonaka, Osaka 5600043, Japan

[4] Japan CERI, Chem Evaluat & Res Inst, 1600 Shimotakano, Sugito, Saitama 3450043, Japan

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 78卷

关键词：

Wide -angle X-ray diffraction (WAXD); Small -angle X-ray scattering (SAXS); Nylon; High -pressure hydrogen; Crystallinity; Void; X-RAY; RUBBER;

D O I：

10.1016/j.ijhydene.2024.06.243

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study was specifically focused on how different degrees of crystallinity affect the structural changes in crystalline polymers when exposed to high-pressure hydrogen gas. Four nylon 11 samples with different crystallinities were prepared and subsequently exposed to 90 MPa hydrogen gas for one day, followed by rapid decompression. The differences in structure before and immediately after exposure, as well as the structural recovery process over approximately several days, were investigated mainly by wide-angle X-ray diffraction (WAXD) and smallangle X-ray scattering (SAXS). For all nylon 11 samples, the WAXD results indicated increased crystallinity due to exposure, while the SAXS results indicated void formation during the depressurization process. The SAXS results also indicated that the voids gradually shrank with time after decompression and that the time dependence of shrinkage was strongly correlated with crystallinity.

引用

页码：460 / 469

页数：10

共 45 条

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